Saadani National Park is Tanzania 's 13th national park and has an area of 1,062 km (410 sq mi). It was officially gazetted in 2005 and is managed under the Tanzania National Parks Authority . The park is located administratively in southeast Pangani District of Tanga Region and northeast Chalinze District of Pwani Region .
139-632: Gazetted in 2005, it encompasses a preserved ecosystem including the former Saadani game reserve, the former Mkwaja ranch area, the Wami River as well as the Zaraninge Forest . In the late 1960s Saadani Village – the village after which the park has been named – and particularly its sub-village Uvinje, invited the Tanzania Wildlife Division (WD) to help them to prevent the indiscriminate killing of wildlife prevalent in
278-409: A cell wall . Newly dead animals may be covered by an exoskeleton . Fragmentation processes, which break through these protective layers, accelerate the rate of microbial decomposition. Animals fragment detritus as they hunt for food, as does passage through the gut. Freeze-thaw cycles and cycles of wetting and drying also fragment dead material. The chemical alteration of the dead organic matter
417-495: A food chain . Real systems are much more complex than this—organisms will generally feed on more than one form of food, and may feed at more than one trophic level. Carnivores may capture some prey that is part of a plant-based trophic system and others that are part of a detritus-based trophic system (a bird that feeds both on herbivorous grasshoppers and earthworms, which consume detritus). Real systems, with all these complexities, form food webs rather than food chains which present
556-619: A habitat . Ecosystem ecology is the "study of the interactions between organisms and their environment as an integrated system". The size of ecosystems can range up to ten orders of magnitude , from the surface layers of rocks to the surface of the planet. The Hubbard Brook Ecosystem Study started in 1963 to study the White Mountains in New Hampshire . It was the first successful attempt to study an entire watershed as an ecosystem. The study used stream chemistry as
695-417: A buildup of scent attracting the attention of predators, the lioness moves her cubs to a new den site several times a month, carrying them one-by-one by the nape of the neck. Usually, the mother does not integrate herself and her cubs back into the pride until the cubs are six to eight weeks old. Sometimes the introduction to pride life occurs earlier, particularly if other lionesses have given birth at about
834-609: A central role over a wide range, for example, in the slow development of soil from bare rock and the faster recovery of a community from disturbance . Disturbance also plays an important role in ecological processes. F. Stuart Chapin and coauthors define disturbance as "a relatively discrete event in time that removes plant biomass". This can range from herbivore outbreaks, treefalls, fires, hurricanes, floods, glacial advances , to volcanic eruptions . Such disturbances can cause large changes in plant, animal and microbe populations, as well as soil organic matter content. Disturbance
973-549: A closer relationship with P. leo melanochaita . Lion samples from some parts of the Ethiopian Highlands cluster genetically with those from Cameroon and Chad, while lions from other areas of Ethiopia cluster with samples from East Africa. Researchers, therefore, assume Ethiopia is a contact zone between the two subspecies. Genome -wide data of a wild-born historical lion sample from Sudan showed that it clustered with P. l. leo in mtDNA-based phylogenies, but with
1112-471: A constant lookout for circling vultures, which indicate the death or distress of an animal. Most carrion on which both hyenas and lions feed upon are killed by hyenas rather than lions. Carrion is thought to provide a large part of lion diet. Lions and spotted hyenas occupy a similar ecological niche and compete for prey and carrion; a review of data across several studies indicates a dietary overlap of 58.6%. Lions typically ignore hyenas unless they are on
1251-507: A critical role in global nutrient cycling and ecosystem function. Phosphorus enters ecosystems through weathering . As ecosystems age this supply diminishes, making phosphorus-limitation more common in older landscapes (especially in the tropics). Calcium and sulfur are also produced by weathering, but acid deposition is an important source of sulfur in many ecosystems. Although magnesium and manganese are produced by weathering, exchanges between soil organic matter and living cells account for
1390-517: A faster recovery. More severe and more frequent disturbance result in longer recovery times. From one year to another, ecosystems experience variation in their biotic and abiotic environments. A drought , a colder than usual winter, and a pest outbreak all are short-term variability in environmental conditions. Animal populations vary from year to year, building up during resource-rich periods and crashing as they overshoot their food supply. Longer-term changes also shape ecosystem processes. For example,
1529-425: A favoured position in the group, either stalking prey on the "wing", then attacking, or moving a smaller distance in the centre of the group and capturing prey fleeing from other lionesses. Males attached to prides do not usually participate in group hunting. Some evidence suggests, however, that males are just as successful as females; they are typically solo hunters who ambush prey in small bushland. They may join in
SECTION 10
#17327871047871668-470: A few reported cases of old and wounded lions falling prey to wild dogs. Most lionesses reproduce by the time they are four years of age. Lions do not mate at a specific time of year and the females are polyestrous . Like those of other cats, the male lion's penis has spines that point backward. During withdrawal of the penis, the spines rake the walls of the female's vagina, which may cause ovulation . A lioness may mate with more than one male when she
1807-454: A form that can be readily used by plants and microbes. Ecosystems provide a variety of goods and services upon which people depend, and may be part of. Ecosystem goods include the "tangible, material products" of ecosystem processes such as water, food, fuel, construction material, and medicinal plants . Ecosystem services , on the other hand, are generally "improvements in the condition or location of things of value". These include things like
1946-427: A function-based typology has been proposed to leverage the strengths of these different approaches into a unified system. Human activities are important in almost all ecosystems. Although humans exist and operate within ecosystems, their cumulative effects are large enough to influence external factors like climate. Ecosystems provide a variety of goods and services upon which people depend. Ecosystem goods include
2085-698: A general level, for example, tropical forests , temperate grasslands , and arctic tundra . There can be any degree of subcategories among ecosystem types that comprise a biome, e.g., needle-leafed boreal forests or wet tropical forests. Although ecosystems are most commonly categorized by their structure and geography, there are also other ways to categorize and classify ecosystems such as by their level of human impact (see anthropogenic biome ), or by their integration with social processes or technological processes or their novelty (e.g. novel ecosystem ). Each of these taxonomies of ecosystems tends to emphasize different structural or functional properties. None of these
2224-548: A heavier mane. On average, Asiatic lions have sparser manes than African lions. This feature likely evolved to signal the fitness of males to females. Males with darker manes appear to have greater reproductive success and are more likely to remain in a pride for longer. They have longer and thicker hair and higher testosterone levels, but they are also more vulnerable to heat stress. The core body temperature does apparently not increase regardless of sex, season, feeding time, length and colour of mane, but only surface temperature
2363-602: A high affinity to P. l. melanochaita . This result suggested that the taxonomic position of lions in Central Africa may require revision. Other lion subspecies or sister species to the modern lion existed in prehistoric times: The Panthera lineage is estimated to have genetically diverged from the common ancestor of the Felidae around 9.32 to 4.47 million years ago to 11.75 to 0.97 million years ago . Results of analyses differ in
2502-480: A key species sought for exhibition in zoological gardens across the world since the late 18th century. Cultural depictions of lions were prominent in Ancient Egypt , and depictions have occurred in virtually all ancient and medieval cultures in the lion's historic and current range. The English word lion is derived via Anglo-Norman liun from Latin leōnem (nominative: leō ), which in turn
2641-501: A kill or are being harassed, while the latter tend to visibly react to the presence of lions with or without the presence of food. In the Ngorongoro crater , lions subsist largely on kills stolen from hyenas, causing them to increase their kill rate. In Botswana's Chobe National Park, the situation is reversed as hyenas there frequently challenge lions and steal their kills, obtaining food from 63% of all lion kills. When confronted on
2780-514: A kill, hyenas may either leave or wait patiently at a distance of 30–100 m (98–328 ft) until the lions have finished. Hyenas may feed alongside lions and force them off a kill. The two species attack one another even when there is no food involved for no apparent reason. Lions can account for up to 71% of hyena deaths in Etosha National Park . Hyenas have adapted by frequently mobbing lions that enter their home ranges. When
2919-519: A kill. Crippled lions and cubs may fall victim to hyenas and leopards or be trampled by buffalo or elephants. Careless lions may be maimed when hunting prey. Nile crocodiles may also kill and eat lions, evidenced by the occasional lion claw found in crocodile stomachs. Ticks commonly infest the ears, neck and groin regions of the lions. Adult forms of several tapeworm species of the genus Taenia have been isolated from lion intestines, having been ingested as larvae in antelope meat. Lions in
SECTION 20
#17327871047873058-558: A lion makes when sniffing chemical signals and involves an open mouth with bared teeth, raised muzzle, wrinkled nose, closed eyes and relaxed ears. Lions also use chemical and visual marking; males spray urine and scrape plots of ground and objects within the territory. The lion's repertoire of vocalisations is large; variations in intensity and pitch appear to be central to communication. Most lion vocalisations are variations of growling , snarling , meowing and roaring. Other sounds produced include puffing, bleating and humming. Roaring
3197-473: A longer evolutionary history than genetically less diverse lion samples from Asia and West and Central Africa. A whole genome-wide sequence of lion samples showed that samples from West Africa shared alleles with samples from Southern Africa, and samples from Central Africa shared alleles with samples from Asia. This phenomenon indicates that Central Africa was a melting pot of lion populations after they had become isolated, possibly migrating through corridors in
3336-399: A loose pride while females associate with up to 12 other females, forming a stronger pride together with their cubs. Female and male lions associate only when mating. Coalitions of males hold territory for a longer time than single lions. Males in coalitions of three or four individuals exhibit a pronounced hierarchy, in which one male dominates the others and mates more frequently. The lion
3475-672: A means of monitoring ecosystem properties, and developed a detailed biogeochemical model of the ecosystem. Long-term research at the site led to the discovery of acid rain in North America in 1972. Researchers documented the depletion of soil cations (especially calcium) over the next several decades. Ecosystems can be studied through a variety of approaches—theoretical studies, studies monitoring specific ecosystems over long periods of time, those that look at differences between ecosystems to elucidate how they work and direct manipulative experimentation. Studies can be carried out at
3614-528: A more important role in moving nutrients around. This can be especially important as the soil thaws in the spring, creating a pulse of nutrients that become available. Decomposition rates are low under very wet or very dry conditions. Decomposition rates are highest in wet, moist conditions with adequate levels of oxygen. Wet soils tend to become deficient in oxygen (this is especially true in wetlands ), which slows microbial growth. In dry soils, decomposition slows as well, but bacteria continue to grow (albeit at
3753-433: A nomad is a "range". Males associated with a pride patrol the fringes. Both males and females defend the pride against intruders, but the male lion is better-suited for this purpose due to its stockier, more powerful build. Some individuals consistently lead the defense against intruders, while others lag behind. Lions tend to assume specific roles in the pride; slower-moving individuals may provide other valuable services to
3892-554: A nomadic phase before gaining residence in a pride. A study undertaken in the Serengeti National Park revealed that nomadic coalitions gain residency at between 3.5 and 7.3 years of age. In Kruger National Park, dispersing male lions move more than 25 km (16 mi) away from their natal pride in search of their own territory. Female lions stay closer to their natal pride. Therefore, female lions in an area are more closely related to each other than male lions in
4031-406: A number of common, non random properties in the topology of their network. The carbon and nutrients in dead organic matter are broken down by a group of processes known as decomposition. This releases nutrients that can then be re-used for plant and microbial production and returns carbon dioxide to the atmosphere (or water) where it can be used for photosynthesis. In the absence of decomposition,
4170-421: A process known as denitrification . Mycorrhizal fungi which are symbiotic with plant roots, use carbohydrates supplied by the plants and in return transfer phosphorus and nitrogen compounds back to the plant roots. This is an important pathway of organic nitrogen transfer from dead organic matter to plants. This mechanism may contribute to more than 70 Tg of annually assimilated plant nitrogen, thereby playing
4309-425: A reed-bed, a cave, or some other sheltered area, usually away from the pride. She will often hunt alone while the cubs are still helpless, staying relatively close to the den. Lion cubs are born blind, their eyes opening around seven days after birth. They weigh 1.2–2.1 kg (2.6–4.6 lb) at birth and are almost helpless, beginning to crawl a day or two after birth and walking around three weeks of age. To avoid
Saadani National Park - Misplaced Pages Continue
4448-565: A short, rounded head, a reduced neck, and round ears; males have broader heads. The fur varies in colour from light buff to silvery grey, yellowish red, and dark brown. The colours of the underparts are generally lighter. A new-born lion has dark spots , which fade as the cub reaches adulthood, although faint spots may still be seen on the legs and underparts. The tail of all lions ends in a dark, hairy tuft that, in some lions, conceals an approximately 5 mm (0.20 in)-long, hard "spine" or "spur" composed of dermal papillae. The functions of
4587-696: A significant portion of ecosystem fluxes. Potassium is primarily cycled between living cells and soil organic matter. Biodiversity plays an important role in ecosystem functioning. Ecosystem processes are driven by the species in an ecosystem, the nature of the individual species, and the relative abundance of organisms among these species. Ecosystem processes are the net effect of the actions of individual organisms as they interact with their environment. Ecological theory suggests that in order to coexist, species must have some level of limiting similarity —they must be different from one another in some fundamental way, otherwise, one species would competitively exclude
4726-408: A slower rate) even after soils become too dry to support plant growth. Ecosystems are dynamic entities. They are subject to periodic disturbances and are always in the process of recovering from past disturbances. When a perturbation occurs, an ecosystem responds by moving away from its initial state. The tendency of an ecosystem to remain close to its equilibrium state, despite that disturbance,
4865-464: A small effect on ecosystem function. Ecologically distinct species, on the other hand, have a much larger effect. Similarly, dominant species have a large effect on ecosystem function, while rare species tend to have a small effect. Keystone species tend to have an effect on ecosystem function that is disproportionate to their abundance in an ecosystem. An ecosystem engineer is any organism that creates, significantly modifies, maintains or destroys
5004-526: A system to absorb disturbance and reorganize while undergoing change so as to retain essentially the same function, structure, identity, and feedbacks is termed its ecological resilience . Ecosystems can be studied through a variety of approaches—theoretical studies, studies monitoring specific ecosystems over long periods of time, those that look at differences between ecosystems to elucidate how they work and direct manipulative experimentation. Biomes are general classes or categories of ecosystems. However, there
5143-522: A variety of scales, ranging from whole-ecosystem studies to studying microcosms or mesocosms (simplified representations of ecosystems). American ecologist Stephen R. Carpenter has argued that microcosm experiments can be "irrelevant and diversionary" if they are not carried out in conjunction with field studies done at the ecosystem scale. In such cases, microcosm experiments may fail to accurately predict ecosystem-level dynamics. Biomes are general classes or categories of ecosystems. However, there
5282-429: A year old and begin to hunt effectively when nearing the age of two. Single lions are capable of bringing down zebra and wildebeest, while larger prey like buffalo and giraffe are riskier. In Chobe National Park , large prides have been observed hunting African bush elephants up to around 15 years old in exceptional cases, with the victims being calves, juveniles, and even subadults. In typical hunts, each lioness has
5421-404: Is in heat . Lions of both sexes may be involved in group homosexual and courtship activities. Males will also head-rub and roll around with each other before mounting each other. Generation length of the lion is about seven years. The average gestation period is around 110 days; the female gives birth to a litter of between one and four cubs in a secluded den, which may be a thicket,
5560-905: Is a generalist hypercarnivore and is considered to be both an apex and keystone predator due to its wide prey spectrum. Its prey consists mainly of medium-sized to large ungulates , particularly blue wildebeest , plains zebra , African buffalo , gemsbok and giraffe . It also frequently takes common warthog despite it being much smaller. In India, chital and sambar deer are the most common wild prey, while livestock contributes significantly to lion kills outside protected areas. It usually avoids fully grown adult elephants , rhinoceros and hippopotamus and small prey like dik-dik , hyraxes , hares and monkeys . Unusual prey include porcupines and small reptiles. Lions kill other predators but seldom consume them. Young lions first display stalking behaviour at around three months of age, although they do not participate in hunting until they are almost
5699-532: Is a large cat of the genus Panthera , native to Africa and India . It has a muscular, broad-chested body ; a short, rounded head; round ears; and a dark, hairy tuft at the tip of its tail. It is sexually dimorphic ; adult male lions are larger than females and have a prominent mane. It is a social species , forming groups called prides. A lion's pride consists of a few adult males, related females, and cubs. Groups of female lions usually hunt together, preying mostly on medium-sized and large ungulates . The lion
Saadani National Park - Misplaced Pages Continue
5838-553: Is a mixture of dry savannah forest and very dry, deciduous scrub forest . In Africa, the range of the lion originally spanned most of the central African rainforest zone and the Sahara desert. In the 1960s, it became extinct in North Africa, except in the southern part of Sudan. During the mid- Holocene , around 8,000-6,000 years ago, the range of lions expanded into Southeastern and Eastern Europe, partially re-occupying
5977-953: Is affected. Unlike in other felid species, female lions consistently interact with multiple males at once. Another hypothesis suggests that the mane also serves to protect the neck in fights, but this is disputed. During fights, including those involving maneless females and adolescents, the neck is not targeted as much as the face, back, and hindquarters. Injured lions also begin to lose their manes. Almost all male lions in Pendjari National Park are either maneless or have very short manes. Maneless lions have also been reported in Senegal, in Sudan 's Dinder National Park and in Tsavo East National Park , Kenya. Castrated lions often have little to no mane because
6116-470: Is an apex and keystone predator ; although some lions scavenge when opportunities occur and have been known to hunt humans , lions typically do not actively seek out and prey on humans. The lion inhabits grasslands , savannahs , and shrublands . It is usually more diurnal than other wild cats, but when persecuted, it adapts to being active at night and at twilight . During the Neolithic period,
6255-458: Is an international synthesis by over 1000 of the world's leading biological scientists that analyzes the state of the Earth's ecosystems and provides summaries and guidelines for decision-makers. The report identified four major categories of ecosystem services: provisioning, regulating, cultural and supporting services. It concludes that human activity is having a significant and escalating impact on
6394-442: Is consumed by animals while still alive and enters the plant-based trophic system. After plants and animals die, the organic matter contained in them enters the detritus-based trophic system. Ecosystem respiration is the sum of respiration by all living organisms (plants, animals, and decomposers) in the ecosystem. Net ecosystem production is the difference between gross primary production (GPP) and ecosystem respiration. In
6533-423: Is controlled by internal factors. Therefore, internal factors not only control ecosystem processes but are also controlled by them. Ecosystems are dynamic entities—they are subject to periodic disturbances and are always in the process of recovering from some past disturbance. The tendency of an ecosystem to remain close to its equilibrium state, despite that disturbance, is termed its resistance . The capacity of
6672-569: Is followed by succession, a "directional change in ecosystem structure and functioning resulting from biotically driven changes in resource supply." The frequency and severity of disturbance determine the way it affects ecosystem function. A major disturbance like a volcanic eruption or glacial advance and retreat leave behind soils that lack plants, animals or organic matter. Ecosystems that experience such disturbances undergo primary succession . A less severe disturbance like forest fires, hurricanes or cultivation result in secondary succession and
6811-399: Is generally mutual and the recipient appears to express pleasure. The head and neck are the most common parts of the body licked; this behaviour may have arisen out of utility because lions cannot lick these areas themselves. Lions have an array of facial expressions and body postures that serve as visual gestures. A common facial expression is the "grimace face" or flehmen response , which
6950-554: Is governed by three sets of factors—the physical environment (temperature, moisture, and soil properties), the quantity and quality of the dead material available to decomposers, and the nature of the microbial community itself. Temperature controls the rate of microbial respiration; the higher the temperature, the faster the microbial decomposition occurs. Temperature also affects soil moisture, which affects decomposition. Freeze-thaw cycles also affect decomposition—freezing temperatures kill soil microorganisms, which allows leaching to play
7089-405: Is no clear distinction between biomes and ecosystems. Biomes are always defined at a very general level. Ecosystems can be described at levels that range from very general (in which case the names are sometimes the same as those of biomes) to very specific, such as "wet coastal needle-leafed forests". Biomes vary due to global variations in climate . Biomes are often defined by their structure: at
SECTION 50
#17327871047877228-516: Is no clear distinction between biomes and ecosystems. Ecosystem classifications are specific kinds of ecological classifications that consider all four elements of the definition of ecosystems : a biotic component, an abiotic complex, the interactions between and within them, and the physical space they occupy. Biotic factors of the ecosystem are living things; such as plants, animals, and bacteria, while abiotic are non-living components; such as water, soil and atmosphere. Plants allow energy to enter
7367-533: Is no evidence for gene flow between the two lineages, indicating that they did not share the same geographic area. The Eurasian and American cave lions became extinct at the end of the last glacial period without mitochondrial descendants on other continents. The modern lion was probably widely distributed in Africa during the Middle Pleistocene and started to diverge in sub-Saharan Africa during
7506-531: Is primarily achieved through bacterial and fungal action. Fungal hyphae produce enzymes that can break through the tough outer structures surrounding dead plant material. They also produce enzymes that break down lignin , which allows them access to both cell contents and the nitrogen in the lignin. Fungi can transfer carbon and nitrogen through their hyphal networks and thus, unlike bacteria, are not dependent solely on locally available resources. Decomposition rates vary among ecosystems. The rate of decomposition
7645-415: Is short and powerful; it attempts to catch prey with a fast rush and final leap, usually pulls it down by the rump, and kills with a clamping bite to the throat or muzzle . It can hold the prey's throat for up to 13 minutes, until the prey stops moving. It has a bite force from 1593.8 to 1768 Newtons at the canine tip and up 4167.6 Newtons at the carnassial notch. Lions typically consume prey at
7784-485: Is termed its resistance . The capacity of a system to absorb disturbance and reorganize while undergoing change so as to retain essentially the same function, structure, identity, and feedbacks is termed its ecological resilience . Resilience thinking also includes humanity as an integral part of the biosphere where we are dependent on ecosystem services for our survival and must build and maintain their natural capacities to withstand shocks and disturbances. Time plays
7923-590: Is the Tsavo lion pride that always has just one adult male. Prides act as fission–fusion societies , and members will split into subgroups that keep in contact with roars . Nomadic lions range widely and move around sporadically, either in pairs or alone. Pairs are more frequent among related males. A lion may switch lifestyles; nomads can become residents and vice versa. Interactions between prides and nomads tend to be hostile, although pride females in estrus allow nomadic males to approach them. Males spend years in
8062-422: Is the "best" classification. Ecosystem classifications are specific kinds of ecological classifications that consider all four elements of the definition of ecosystems : a biotic component, an abiotic complex, the interactions between and within them, and the physical space they occupy. Different approaches to ecological classifications have been developed in terrestrial, freshwater and marine disciplines, and
8201-615: Is the most social of all wild felid species, living in groups of related individuals with their offspring. Such a group is called a " pride ". Groups of male lions are called "coalitions". Females form the stable social unit in a pride and do not tolerate outside females. The majority of females remain in their birth prides while all males and some females will disperse . The average pride consists of around 15 lions, including several adult females and up to four males and their cubs of both sexes. Large prides, consisting of up to 30 individuals, have been observed. The sole exception to this pattern
8340-480: Is typically brownish and tinged with yellow, rust, and black hairs. Mutations in the genes microphthalmia-associated transcription factor and tyrosinase are possibly responsible for the colour of manes. It starts growing when lions enter adolescence, when testosterone levels increase, and reach their full size at around four years old. Cool ambient temperatures in European and North American zoos may result in
8479-426: Is unable to consume all of the kill, it rests for a few hours before continuing to eat. On hot days, the pride retreats to shade with one or two males standing guard. Lions defend their kills from scavengers such as vultures and hyenas. Lions scavenge on carrion when the opportunity arises, scavenging animals dead from natural causes such as disease or those that were killed by other predators. Scavenging lions keep
SECTION 60
#17327871047878618-512: The Narmada River in central India. Lions spend much of their time resting; they are inactive for about twenty hours per day. Although lions can be active at any time, their activity generally peaks after dusk with a period of socialising, grooming, and defecating. Intermittent bursts of activity continue until dawn, when hunting most often takes place. They spend an average of two hours a day walking and fifty minutes eating. The lion
8757-484: The Nile Basin during the early Holocene . In zoos, lions have been bred with tigers to create hybrids for the curiosity of visitors or for scientific purpose. The liger is bigger than a lion and a tiger, whereas most tigons are relatively small compared to their parents because of reciprocal gene effects. The leopon is a hybrid between a lion and leopard. The lion is a muscular, broad-chested cat with
8896-555: The resource inputs are generally controlled by external processes like climate and parent material, the availability of these resources within the ecosystem is controlled by internal factors like decomposition, root competition or shading. Other factors like disturbance, succession or the types of species present are also internal factors. Primary production is the production of organic matter from inorganic carbon sources. This mainly occurs through photosynthesis . The energy incorporated through this process supports life on earth, while
9035-435: The "tangible, material products" of ecosystem processes such as water, food, fuel, construction material, and medicinal plants . They also include less tangible items like tourism and recreation, and genes from wild plants and animals that can be used to improve domestic species. Ecosystem services , on the other hand, are generally "improvements in the condition or location of things of value". These include things like
9174-775: The Asiatic lion population. In 2017, the Cat Classification Task Force of the Cat Specialist Group revised lion taxonomy , and recognises two subspecies based on results of several phylogeographic studies on lion evolution , namely: However, there seems to be some degree of overlap between both groups in northern Central Africa. DNA analysis from a more recent study indicates that Central African lions are derived from both northern and southern lions, as they cluster with P. leo leo in mtDNA-based phylogenies whereas their genomic DNA indicates
9313-629: The Late Pleistocene. Lion populations in East and Southern Africa became separated from populations in West and North Africa when the equatorial rainforest expanded 183,500 to 81,800 years ago. They shared a common ancestor probably between 98,000 and 52,000 years ago. Due to the expansion of the Sahara between 83,100 and 26,600 years ago, lion populations in West and North Africa became separated. As
9452-566: The Ngorongoro Crater were afflicted by an outbreak of stable fly ( Stomoxys calcitrans ) in 1962, resulting in lions becoming emaciated and covered in bloody, bare patches. Lions sought unsuccessfully to evade the biting flies by climbing trees or crawling into hyena burrows; many died or migrated and the local population dropped from 70 to 15 individuals. A more recent outbreak in 2001 killed six lions. Captive lions have been infected with canine distemper virus (CDV) since at least
9591-521: The Park. Spatial analysis on the area of the former Saadani Game reserve, illustrates TANAPA's strategy to gazette Saadani's prime coastal lands as if they have always been a part of the SGR. The total extent of SGR is said to have been approximately 209 km (81 sq mi), however, the SGR official gazette document states that it comprised approximately 300 km (120 sq mi), The vagueness of
9730-464: The Saadani landscape, but it is only recently that state-managed conservation has become a growing concern among the villages adjacent to the park. In the late 1990s, Mr. Domician Njao, from Tanzania National Parks Authority (TANAPA) came in to "upgrade" the reserve to a National Park, and create the first and only coastal national park of Tanzania. In doing so, park authorities redrew the boundaries of
9869-481: The absence of disturbance, net ecosystem production is equivalent to the net carbon accumulation in the ecosystem. Energy can also be released from an ecosystem through disturbances such as wildfire or transferred to other ecosystems (e.g., from a forest to a stream to a lake) by erosion . In aquatic systems , the proportion of plant biomass that gets consumed by herbivores is much higher than in terrestrial systems. In trophic systems, photosynthetic organisms are
10008-697: The adjacent Timbavati Private Game Reserve in eastern South Africa. They were removed from the wild in the 1970s, thus decreasing the white lion gene pool . Nevertheless, 17 births have been recorded in five prides between 2007 and 2015. White lions are selected for breeding in captivity. They have reportedly been bred in camps in South Africa for use as trophies to be killed during canned hunts . African lions live in scattered populations across sub-Saharan Africa. The lion prefers grassy plains and savannahs , scrub bordering rivers, and open woodlands with bushes. It rarely enters closed forests. On Mount Elgon ,
10147-424: The age of two. When a new male lion takes over a pride, adolescents both male and female may be evicted. Lions may live 12–17 years in the wild. Although adult lions have no natural predators, evidence suggests most die violently from attacks by humans or other lions. Lions often inflict serious injuries on members of other prides they encounter in territorial disputes or members of the home pride when fighting at
10286-402: The amount of energy available to the ecosystem. Parent material determines the nature of the soil in an ecosystem, and influences the supply of mineral nutrients. Topography also controls ecosystem processes by affecting things like microclimate , soil development and the movement of water through a system. For example, ecosystems can be quite different if situated in a small depression on
10425-504: The amount of light available, the amount of leaf area a plant has to capture light (shading by other plants is a major limitation of photosynthesis), the rate at which carbon dioxide can be supplied to the chloroplasts to support photosynthesis, the availability of water, and the availability of suitable temperatures for carrying out photosynthesis. Energy and carbon enter ecosystems through photosynthesis, are incorporated into living tissue, transferred to other organisms that feed on
10564-544: The animal's expressive movements are highly developed. The most common peaceful, tactile gestures are head rubbing and social licking , which have been compared with the role of allogrooming among primates. Head rubbing, nuzzling the forehead, face and neck against another lion appears to be a form of greeting and is seen often after an animal has been apart from others or after a fight or confrontation. Males tend to rub other males, while cubs and females rub females. Social licking often occurs in tandem with head rubbing; it
10703-595: The area. From this partnership Saadani village and the Wildlife Division established the Saadani Game Reserve (SGR), with the agreement to respect the land rights of the coastal sub-villages of Saadani, including Uvinje and Porokanya sub-villages, while also addressing the needs of wildlife. As such, conservation interventions in the Saadani landscape have taken place since the mid-1960s and have been supported by villagers traditionally inhabiting
10842-499: The attack. They take advantage of factors that reduce visibility; many kills take place near some form of cover or at night. One study in 2018 recorded a lion running at a top speed of 74.1 km/h (46.0 mph). The lion accelerates at the start of the chase by 9.5 m/s² , whereas zebras, wildebeest and Thomson's gazelle accelerate by 5 m/s², 5.6 m/s² and 4.5 m/s², respectively; acceleration appears to be more important than steady displacement speed in lion hunts. The lion's attack
10981-835: The best driest months with peak temperatures reaching up to 29C. The best period for visits is the dry season, although the Park remains attractive year-round. Saadani's wildlife population is increasing during recent years after it has been gazetted as a National Park and was a hunting block beforehand. Wildlife in Saadani includes four of the Big Five, namely lions , African bush elephants , Cape buffaloes and leopards . Masai giraffes , Lichtenstein's hartebeest , waterbucks , blue wildebeests , bohor reedbucks , common and red duikers , Dik-Diks , yellow baboons , vervet monkeys , blue monkeys , Colobus monkeys , mongooses , genets , porcupines , sable antelopes , warthogs , hippopotamuses , crocodiles , nile monitors are also found in
11120-447: The biodiversity of the world ecosystems, reducing both their resilience and biocapacity . The report refers to natural systems as humanity's "life-support system", providing essential ecosystem services. The assessment measures 24 ecosystem services and concludes that only four have shown improvement over the last 50 years, 15 are in serious decline, and five are in a precarious condition. Lion The lion ( Panthera leo )
11259-408: The carbon makes up much of the organic matter in living and dead biomass, soil carbon and fossil fuels . It also drives the carbon cycle , which influences global climate via the greenhouse effect . Through the process of photosynthesis, plants capture energy from light and use it to combine carbon dioxide and water to produce carbohydrates and oxygen . The photosynthesis carried out by all
11398-460: The cause of the decline is not fully understood, habitat loss and conflicts with humans are the greatest causes for concern. One of the most widely recognised animal symbols in human culture, the lion has been extensively depicted in sculptures and paintings, on national flags, and in literature and films. Lions have been kept in menageries since the time of the Roman Empire and have been
11537-548: The central motivation in park community-conflicts, and suggest that deeply rooted spatial-cultural territorial connections are as essential as and perhaps even more important to people's collective welfare than material benefits. To this day, park governance and management approaches have been unable to gain the support of surrounding villages, which traditionally have been very conservation minded, for addressing poaching and for collaboratively sustaining landscape level conservation efforts. All of which are desperately needed to combat
11676-458: The coastal lands without coming to an agreement with the leaders at that time, who have reiterated that they did not agree to giving coastal lands to TANAPA. In summary, the SNP boundaries and lands have been officially contested by District authorities and no less than 6 villages, while at least 4 adjacent villages are engaged in higher level advocacy to have park boundaries reassessed. However, of all
11815-432: The combustion of fossil fuels, ammonia gas which evaporates from agricultural fields which have had fertilizers applied to them, and dust. Anthropogenic nitrogen inputs account for about 80% of all nitrogen fluxes in ecosystems. When plant tissues are shed or are eaten, the nitrogen in those tissues becomes available to animals and microbes. Microbial decomposition releases nitrogen compounds from dead organic matter in
11954-418: The concept to draw attention to the importance of transfers of materials between organisms and their environment. He later refined the term, describing it as "The whole system, ... including not only the organism-complex, but also the whole complex of physical factors forming what we call the environment". Tansley regarded ecosystems not simply as natural units, but as "mental isolates". Tansley later defined
12093-411: The cubs varies—one male could patiently let the cubs play with his tail or his mane, while another may snarl and bat the cubs away. Pride lionesses often synchronise their reproductive cycles and communal rearing and suckling of the young, which suckle indiscriminately from any or all of the nursing females in the pride. The synchronisation of births is advantageous because the cubs grow to being roughly
12232-403: The dead organic matter would accumulate in an ecosystem, and nutrients and atmospheric carbon dioxide would be depleted. Decomposition processes can be separated into three categories— leaching , fragmentation and chemical alteration of dead material. As water moves through dead organic matter, it dissolves and carries with it the water-soluble components. These are then taken up by organisms in
12371-655: The ecosystem or to gradual disruption of biotic processes and degradation of abiotic conditions of the ecosystem. Once the original ecosystem has lost its defining features, it is considered "collapsed ". Ecosystem restoration can contribute to achieving the Sustainable Development Goals . An ecosystem (or ecological system) consists of all the organisms and the abiotic pools (or physical environment) with which they interact. The biotic and abiotic components are linked together through nutrient cycles and energy flows. "Ecosystem processes" are
12510-421: The flow of energy through a lake was the primary driver of the ecosystem. Hutchinson's students, brothers Howard T. Odum and Eugene P. Odum , further developed a "systems approach" to the study of ecosystems. This allowed them to study the flow of energy and material through ecological systems. Ecosystems are controlled by both external and internal factors. External factors, also called state factors, control
12649-458: The forests of eastern North America still show legacies of cultivation which ceased in 1850 when large areas were reverted to forests. Another example is the methane production in eastern Siberian lakes that is controlled by organic matter which accumulated during the Pleistocene . Ecosystems continually exchange energy and carbon with the wider environment . Mineral nutrients, on
12788-534: The group. Alternatively, there may be rewards associated with being a leader that fends off intruders; the rank of lionesses in the pride is reflected in these responses. The male or males associated with the pride must defend their relationship with the pride from outside males who may attempt to usurp them. Dominance hierarchies do not appear to exist among individuals of either sex in a pride. Asiatic lion prides differ in group composition. Male Asiatic lions are solitary or associate with up to three males, forming
12927-570: The hunting of large, slower-moving prey like buffalo; and even hunt them on their own. Moderately-sized hunting groups generally have higher success rates than lone females and larger groups. Lions are not particularly known for their stamina. For instance, a lioness's heart comprises only 0.57% of her body weight and a male's is about 0.45% of his body weight, whereas a hyena's heart comprises almost 1% of its body weight. Thus, lions run quickly only in short bursts at about 48–59 km/h (30–37 mph) and need to be close to their prey before starting
13066-691: The landscape, versus one present on an adjacent steep hillside. Other external factors that play an important role in ecosystem functioning include time and potential biota , the organisms that are present in a region and could potentially occupy a particular site. Ecosystems in similar environments that are located in different parts of the world can end up doing things very differently simply because they have different pools of species present. The introduction of non-native species can cause substantial shifts in ecosystem function. Unlike external factors, internal factors in ecosystems not only control ecosystem processes but are also controlled by them. While
13205-410: The language used in the reserve's official gazette, but also TANAPA's early interventions to develop its own map of the reserve, and its interests in Saadani's sub-villages’ prime coastal lands have come to challenge Saadani's coastal sub-villages’ rights to lawfully inhabit their traditional territories, and have led to chronic political and other battles to demand presently gazetted park lands rescinded,
13344-722: The lion has been recorded up to an elevation of 3,600 m (11,800 ft) and close to the snow line on Mount Kenya . Savannahs with an annual rainfall of 300 to 1,500 mm (12 to 59 in) make up the majority of lion habitat in Africa, estimated at 3,390,821 km (1,309,203 sq mi) at most, but remnant populations are also present in tropical moist forests in West Africa and montane forests in East Africa. The Asiatic lion now survives only in and around Gir National Park in Gujarat, western India. Its habitat
13483-810: The lion population in Kenya's Masai Mara National Reserve declined, the spotted hyena population increased rapidly. Lions tend to dominate cheetahs and leopards, steal their kills and kill their cubs and even adults when given the chance. Cheetahs often lose their kills to lions or other predators. A study in the Serengeti ecosystem revealed that lions killed at least 17 of 125 cheetah cubs born between 1987 and 1990. Cheetahs avoid their competitors by hunting at different times and habitats. Leopards, by contrast, do not appear to be motivated by an avoidance of lions, as they use heavy vegetation regardless of whether lions are present in an area and both cats are active around
13622-544: The lion ranged throughout Africa and Eurasia, from Southeast Europe to India, but it has been reduced to fragmented populations in sub-Saharan Africa and one population in western India . It has been listed as Vulnerable on the IUCN Red List since 1996 because populations in African countries have declined by about 43% since the early 1990s. Lion populations are untenable outside designated protected areas. Although
13761-423: The living and dead plant matter, and eventually released through respiration. The carbon and energy incorporated into plant tissues (net primary production) is either consumed by animals while the plant is alive, or it remains uneaten when the plant tissue dies and becomes detritus . In terrestrial ecosystems , the vast majority of the net primary production ends up being broken down by decomposers . The remainder
13900-551: The location of the hunt but sometimes drag large prey into cover. They tend to squabble over kills, particularly the males. Cubs suffer most when food is scarce but otherwise all pride members eat their fill, including old and crippled lions, which can live on leftovers. Large kills are shared more widely among pride members. An adult lioness requires an average of about 5 kg (11 lb) of meat per day while males require about 7 kg (15 lb). Lions gorge themselves and eat up to 30 kg (66 lb) in one session. If it
14039-471: The maintenance of hydrological cycles , cleaning air and water, the maintenance of oxygen in the atmosphere, crop pollination and even things like beauty, inspiration and opportunities for research. Many ecosystems become degraded through human impacts, such as soil loss , air and water pollution , habitat fragmentation , water diversion , fire suppression , and introduced species and invasive species . These threats can lead to abrupt transformation of
14178-408: The maintenance of hydrological cycles, cleaning air and water, the maintenance of oxygen in the atmosphere, crop pollination and even things like beauty, inspiration and opportunities for research. While material from the ecosystem had traditionally been recognized as being the basis for things of economic value, ecosystem services tend to be taken for granted. The Millennium Ecosystem Assessment
14317-491: The mid-1970s. CDV is spread by domestic dogs and other carnivores; a 1994 outbreak in Serengeti National Park resulted in many lions developing neurological symptoms such as seizures. During the outbreak, several lions died from pneumonia and encephalitis . Feline immunodeficiency virus and lentivirus also affect captive lions. When resting, lion socialisation occurs through a number of behaviours;
14456-537: The other hand, are mostly cycled back and forth between plants, animals, microbes and the soil. Most nitrogen enters ecosystems through biological nitrogen fixation , is deposited through precipitation, dust, gases or is applied as fertilizer . Most terrestrial ecosystems are nitrogen-limited in the short term making nitrogen cycling an important control on ecosystem production. Over the long term, phosphorus availability can also be critical. Macronutrients which are required by all plants in large quantities include
14595-509: The other. Despite this, the cumulative effect of additional species in an ecosystem is not linear: additional species may enhance nitrogen retention, for example. However, beyond some level of species richness, additional species may have little additive effect unless they differ substantially from species already present. This is the case for example for exotic species . The addition (or loss) of species that are ecologically similar to those already present in an ecosystem tends to only have
14734-403: The overall structure of an ecosystem and the way things work within it, but are not themselves influenced by the ecosystem. On broad geographic scales, climate is the factor that "most strongly determines ecosystem processes and structure". Climate determines the biome in which the ecosystem is embedded. Rainfall patterns and seasonal temperatures influence photosynthesis and thereby determine
14873-471: The park. Since 2005, the protected area is considered a Lion Conservation Unit. Ecosystem An ecosystem (or ecological system ) is a system that environments and their organisms form through their interaction. The biotic and abiotic components are linked together through nutrient cycles and energy flows. Ecosystems are controlled by external and internal factors . External factors such as climate , parent material which forms
15012-490: The park. This despite numerous communications taking place since the early 2000s where village leaders continuously reiterate that Uvinje lands have never been a part of the reserve and that they will not vacate their lands . Important park establishment documents illustrate that TANAPA's argument for gazetting lands from two Saadani coastal sub-villages is that they have always being part of the former game reserve, an argument that seem to have allowed them to move forward gazetting
15151-434: The phylogenetic relationship of the lion; it was thought to form a sister group with the jaguar that diverged 3.46 to 1.22 million years ago , but also with the leopard that diverged 3.1 to 1.95 million years ago to 4.32 to 0.02 million years ago . Hybridisation between lion and snow leopard ancestors possibly continued until about 2.1 million years ago. The lion-leopard clade
15290-405: The plants in an ecosystem is called the gross primary production (GPP). About half of the gross GPP is respired by plants in order to provide the energy that supports their growth and maintenance. The remainder, that portion of GPP that is not used up by respiration, is known as the net primary production (NPP). Total photosynthesis is limited by a range of environmental factors. These include
15429-612: The previous males associated with a pride, the victors often kill any existing young cubs , perhaps because females do not become fertile and receptive until their cubs mature or die. Females often fiercely defend their cubs from a usurping male but are rarely successful unless a group of three or four mothers within a pride join forces against the male. Cubs also die from starvation and abandonment, and predation by leopards, hyenas and wild dogs. Male cubs are excluded from their maternal pride when they reach maturity at around two or three years of age, while some females may leave when they reach
15568-585: The primary nutrients (which are most limiting as they are used in largest amounts): Nitrogen, phosphorus, potassium. Secondary major nutrients (less often limiting) include: Calcium, magnesium, sulfur. Micronutrients required by all plants in small quantities include boron, chloride, copper, iron, manganese, molybdenum, zinc. Finally, there are also beneficial nutrients which may be required by certain plants or by plants under specific environmental conditions: aluminum, cobalt, iodine, nickel, selenium, silicon, sodium, vanadium. Until modern times, nitrogen fixation
15707-413: The primary producers. The organisms that consume their tissues are called primary consumers or secondary producers — herbivores . Organisms which feed on microbes ( bacteria and fungi ) are termed microbivores . Animals that feed on primary consumers— carnivores —are secondary consumers. Each of these constitutes a trophic level. The sequence of consumption—from plant to herbivore, to carnivore—forms
15846-589: The rainforest decreased and thus gave rise to more open habitats, lions moved from West to Central Africa. Lions from North Africa dispersed to southern Europe and Asia between 38,800 and 8,300 years ago. Extinction of lions in southern Europe, North Africa and the Middle East interrupted gene flow between lion populations in Asia and Africa. Genetic evidence revealed numerous mutations in lion samples from East and Southern Africa, which indicates that this group has
15985-457: The range of the now extinct cave lion . In Hungary , the modern lion was present from about 4,500 to 3,200 years Before Present . In Ukraine , the modern lion was present from about 6,400 to 2,000 years Before Present. In Greece, it was common, as reported by Herodotus in 480 BC; it was considered rare by 300 BC and extirpated by AD 100. In Asia the lion once ranged in regions where climatic conditions supported an abundance of prey. It
16124-443: The reestablishment of land rights to traditional inhabitants, and to demand from TANAPA to honour commitments made earlier by Wildlife Division. By law, setting aside areas for conservation has to be consulted on, at least to some extent, with affected villages. However, it was not until late in 2005 that the village of Saadani and leaders of its Uvinje sub-village realized that the full extent of Uvinje's lands were gazetted as part of
16263-488: The removal of the gonads inhibits testosterone production. Rarely, both wild and captive lionesses have manes. Increased testosterone may be the cause of maned lionesses reported in northern Botswana. The white lion is a rare morph with a genetic condition called leucism , which is caused by a double recessive allele . It is not albino; it has normal pigmentation in the eyes and skin. White lions have occasionally been encountered in and around Kruger National Park and
16402-475: The reserve to include Uvinje's and Porokanya's prime coastal lands as if they have always been a part of the reserve in so doing changing the agreement with those villagers. Compelling research shows how after this TANAPA proceeded to gazette most of Saadani's coastal lands as part of the Saadani National Park in 2005, arguing that they have always being a part of the former reserve and belonged to
16541-429: The same area. The evolution of sociability in lions was likely driven both by high population density and the clumped resources of savannah habitats. The larger the pride, the more high-quality territory they can defend; "hotspots" being near river confluences , where the cats have better access to water, prey and shelter (via vegetation). The area occupied by a pride is called a "pride area" whereas that occupied by
16680-420: The same size and have an equal chance of survival, and sucklings are not dominated by older cubs. Weaning occurs after six or seven months. Male lions reach maturity at about three years of age and at four to five years are capable of challenging and displacing adult males associated with another pride. They begin to age and weaken at between 10 and 15 years of age at the latest. When one or more new males oust
16819-406: The same time of day. In addition, there is no evidence that lions affect leopard abundance. Leopards take refuge in trees, though lionesses occasionally attempt to climb up and retrieve their kills. Lions similarly dominate African wild dogs , taking their kills and dispatching pups or adult dogs. Population densities of wild dogs are low in areas where lions are more abundant. However, there are
16958-420: The same time. When first introduced to the rest of the pride, lion cubs lack confidence when confronted with adults other than their mother. They soon begin to immerse themselves in the pride life, however, playing among themselves or attempting to initiate play with the adults. Lionesses with cubs of their own are more likely to be tolerant of another lioness's cubs than lionesses without cubs. Male tolerance of
17097-425: The sevenfold increase in poaching activity being faced by the park in the last seven years. No less than 10 of the 17 villages adjacent to the park have their own community-conserved areas, equivalent to no less than 20% of area identified as park lands. Despite the level of environmental awareness of these adjacent villages and the importance of corridors and ecosystem connectivity to successful ecological conservation,
17236-409: The soil and topography , control the overall structure of an ecosystem but are not themselves influenced by the ecosystem. Internal factors are controlled, for example, by decomposition , root competition, shading, disturbance, succession, and the types of species present. While the resource inputs are generally controlled by external processes, the availability of these resources within the ecosystem
17375-611: The soil, react with mineral soil, or are transported beyond the confines of the ecosystem (and are considered lost to it). Newly shed leaves and newly dead animals have high concentrations of water-soluble components and include sugars , amino acids and mineral nutrients. Leaching is more important in wet environments and less important in dry ones. Fragmentation processes break organic material into smaller pieces, exposing new surfaces for colonization by microbes. Freshly shed leaf litter may be inaccessible due to an outer layer of cuticle or bark , and cell contents are protected by
17514-511: The soil, where plants, fungi, and bacteria compete for it. Some soil bacteria use organic nitrogen-containing compounds as a source of carbon, and release ammonium ions into the soil. This process is known as nitrogen mineralization . Others convert ammonium to nitrite and nitrate ions, a process known as nitrification . Nitric oxide and nitrous oxide are also produced during nitrification. Under nitrogen-rich and oxygen-poor conditions, nitrates and nitrites are converted to nitrogen gas ,
17653-483: The spatial extent of ecosystems using the term " ecotope ". G. Evelyn Hutchinson , a limnologist who was a contemporary of Tansley's, combined Charles Elton 's ideas about trophic ecology with those of Russian geochemist Vladimir Vernadsky . As a result, he suggested that mineral nutrient availability in a lake limited algal production . This would, in turn, limit the abundance of animals that feed on algae. Raymond Lindeman took these ideas further to suggest that
17792-422: The spur are unknown. The tuft is absent at birth and develops at around 5 + 1 ⁄ 2 months of age. It is readily identifiable at the age of seven months. Its skull is very similar to that of the tiger, although the frontal region is usually more depressed and flattened and has a slightly shorter postorbital region and broader nasal openings than those of the tiger. Due to the amount of skull variation in
17931-454: The system through photosynthesis , building up plant tissue. Animals play an important role in the movement of matter and energy through the system, by feeding on plants and on one another. They also influence the quantity of plant and microbial biomass present. By breaking down dead organic matter , decomposers release carbon back to the atmosphere and facilitate nutrient cycling by converting nutrients stored in dead biomass back to
18070-413: The tiger in size. The size and weight of adult lions vary across its range and habitats. Accounts of a few individuals that were larger than average exist from Africa and India. The male lion's mane is the most recognisable feature of the species. It may have evolved around 320,000–190,000 years ago. It grows downwards and backwards, covering most of the head, neck, shoulders, and chest. The mane
18209-421: The transfers of energy and materials from one pool to another. Ecosystem processes are known to "take place at a wide range of scales". Therefore, the correct scale of study depends on the question asked. The term "ecosystem" was first used in 1935 in a publication by British ecologist Arthur Tansley . The term was coined by Arthur Roy Clapham , who came up with the word at Tansley's request. Tansley devised
18348-407: The two species, usually only the structure of the lower jaw can be used as a reliable indicator of species. The skeletal muscles of the lion make up 58.8% of its body weight and represent the highest percentage of muscles among mammals. The lion has a high concentration of fast twitch muscle fibers, giving them quick bursts of speed but less stamina. Among felids, the lion is second only to
18487-725: The villages, it is Saadani which faces the greatest challenges on the gazetting of a large part of its coastal territory which, by all accounts, has been done unilaterally. Saadani is also the village with the largest strip of coastal land. At present, and after more than a decade of institutional struggles, Saadani village has resisted TANAPA's various approaches to take possession of the now sub-village's gazetted territory and have consistently demanded that their land rights be restored, and continue to reiterate that they are not going to give their traditional territory for any amount of compensation money. Such community assertions and actions certainly challenge traditional conceptions of economic gain as
18626-465: The villages’ conservation efforts have not been linked to park efforts but at present represent a threat to park authorities. For park authorities, it is within villages’ conserved areas where more often than not poaching is seen to be taking place. The Park experiences an Eastern African coastal climate with bimodal rainfall, which ranges 800 – 1200mm annually. Long rains fall from March to June and short ones from October to December. February and July are
18765-400: Was a borrowing from Ancient Greek λέων léōn . The Hebrew word לָבִיא lavi may also be related. The generic name Panthera is traceable to the classical Latin word 'panthēra' and the ancient Greek word πάνθηρ 'panther'. Felis leo was the scientific name used by Carl Linnaeus in 1758, who described the lion in his work Systema Naturae . The genus name Panthera
18904-593: Was coined by Lorenz Oken in 1816. Between the mid-18th and mid-20th centuries, 26 lion specimens were described and proposed as subspecies, of which 11 were recognised as valid in 2005. They were distinguished mostly by the size and colour of their manes and skins. In the 19th and 20th centuries, several lion type specimens were described and proposed as subspecies , with about a dozen recognised as valid taxa until 2017. Between 2008 and 2016, IUCN Red List assessors used only two subspecific names: P. l. leo for African lion populations, and P. l. persica for
19043-520: Was distributed in the Asian and African Palearctic since at least the early Pliocene . The earliest fossils recognisable as lions were found at Olduvai Gorge in Tanzania and are estimated to be up to 2 million years old. Estimates for the divergence time of the modern and cave lion lineages range from 529,000 to 392,000 years ago based on mutation rate per generation time of the modern lion. There
19182-951: Was present in the Caucasus until the 10th century. It lived in Palestine until the Middle Ages and in Southwest Asia until the late 19th century. By the late 19th century, it had been extirpated in most of Turkey. The last live lion in Iran was sighted in 1942, about 65 km (40 mi) northwest of Dezful , although the corpse of a lioness was found on the banks of the Karun river in Khuzestan province in 1944. It once ranged from Sind and Punjab in Pakistan to Bengal and
19321-679: Was the major source of nitrogen for ecosystems. Nitrogen-fixing bacteria either live symbiotically with plants or live freely in the soil. The energetic cost is high for plants that support nitrogen-fixing symbionts—as much as 25% of gross primary production when measured in controlled conditions. Many members of the legume plant family support nitrogen-fixing symbionts. Some cyanobacteria are also capable of nitrogen fixation. These are phototrophs , which carry out photosynthesis. Like other nitrogen-fixing bacteria, they can either be free-living or have symbiotic relationships with plants. Other sources of nitrogen include acid deposition produced through
#786213