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83-597: The Hokianga is an area surrounding the Hokianga Harbour , also known as the Hokianga River , a long estuarine drowned valley on the west coast in the north of the North Island of New Zealand . The original name, still used by local Māori , is Te Kohanga o Te Tai Tokerau ("the nest of the northern people") or Te Puna o Te Ao Marama ("the wellspring in the world of light"). The full name of

166-728: A DBE in 1981 and a member of the Order of New Zealand in 1991. She had returned to Panguru in the Hokianga in 1983. She died there on 26 March 1994 at the age of 98. Bishop Jean Baptiste Pompallier (1802-1871), was the first Roman Catholic bishop in New Zealand. His first mission station was situated at Pūrākau in the Hokianga from 1839 until 1915. He celebrated the first mass on NZ 'terra firma' at Tōtara Point, Hokianga, in 1838. His remains were reinterred in Motuti, Hokianga, in 2002 after

249-465: A general geographic region, or merely gave a waka name. Initiatives like the Iwi Helpline are trying to make it easier for people to identify their iwi , and the proportion who "don't know" dropped relative to previous censuses. Some established pan-tribal organisations may exert influence across iwi divisions. The Rātana Church, for example, operates across iwi divisions, and

332-414: A generally recognised territory ( rohe ), but many of these overlap, sometimes completely. This has added a layer of complication to the long-running discussions and court cases about how to resolve historical Treaty claims. The length of coastline emerged as one factor in the final (2004) legislation to allocate fishing-rights in settlement of claims relating to commercial fisheries. Iwi can become

415-748: A group), Ngāti Poneke (Māori who have migrated to the Wellington region), and Ngāti Rānana (Māori living in London). Ngāti Tūmatauenga ("Tribe of Tūmatauenga ", the god of war) is the official Māori-language name of the New Zealand Army , and Ngā Opango ("Black Tribe") is a Māori-language name for the All Blacks . In the southern dialect of Māori, Ngāti and Ngāi become Kāti and Kāi , terms found in such iwi as Kāti Māmoe and Kāi Tahu (also known as Ngai Tahu). Each iwi has

498-573: A harsh environment for organisms. Sediment often settles in intertidal mudflats which are extremely difficult to colonize. No points of attachment exist for algae , so vegetation based habitat is not established. Sediment can also clog feeding and respiratory structures of species, and special adaptations exist within mudflat species to cope with this problem. Lastly, dissolved oxygen variation can cause problems for life forms. Nutrient-rich sediment from human-made sources can promote primary production life cycles, perhaps leading to eventual decay removing

581-399: A nationwide hīkoi. Opononi became famous throughout New Zealand during 1955 and 1956 due to the exploits of a bottlenose dolphin (nicknamed " Opo "). Opo was a wild dolphin who started following fishing boats around Opononi in early 1955 after her mother had been killed, and would swim daily in the bay close to town. She was originally named "Opononi Jack", based on Pelorus Jack , since she

664-529: A number of coastal water bodies such as coastal lagoons and brackish seas. A more comprehensive definition of an estuary is "a semi-enclosed body of water connected to the sea as far as the tidal limit or the salt intrusion limit and receiving freshwater runoff; however the freshwater inflow may not be perennial, the connection to the sea may be closed for part of the year and tidal influence may be negligible". This broad definition also includes fjords , lagoons , river mouths , and tidal creeks . An estuary

747-449: A particular hapu may have belonged to different iwi at different times, the tension caused by the social and economic power moving from the iwi down rather than from the hapu up, and the fact that many iwi do not recognise spouses and adoptees who do not have kinship links. In the 2006 census, 16 per cent of the 643,977 people who claimed Māori ancestry did not know their iwi . Another 11 per cent did not state their iwi , or stated only

830-438: A prospective vehicle for ideas and ideals of self-determination and/or tino rangatiratanga . Thus does Te Pāti Māori mention in the preamble of its constitution "the dreams and aspirations of tangata whenua to achieve self-determination for whānau , hapū and iwi within their own land". Some Tūhoe envisage self-determination in specifically iwi -oriented terms. Increasing urbanisation of Māori has led to

913-480: A situation where a significant percentage do not identify with any particular iwi . The following extract from a 2000 High Court of New Zealand judgment discussing the process of settling fishing rights illustrates some of the issues: ... 81 per cent of Maori now live in urban areas, at least one-third live outside their tribal influence, more than one-quarter do not know their iwi or for some reason do not choose to affiliate with it, at least 70 per cent live outside

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996-462: A symbolic march – to protest against the loss of Māori land for which she is best remembered. The march, from the northern tip of the North Island to Parliament in Wellington at the other end of the island made her nationally recognised, with her determined figure, no longer strong in body but strong in mana and will, walking at the head of the march from Te Hapua to Wellington. She was made

1079-471: A title that failed to endear him to Ngāpuhi. His project collapsed, but it highlighted to the Colonial Service the need to protect against rival European powers. The year after de Thierry arrived, another Frenchman, Bishop Jean Baptiste Pompallier , arrived, with the aim of establishing a Catholic mission. He found the southern shores firmly in the hands of Methodist and Anglican missionaries, but

1162-408: A type of ecosystem in some estuaries that have been negatively impacted by eutrophication. Cordgrass vegetation dominates the salt marsh landscape. Excess nutrients allow the plants to grow at greater rates in above ground biomass, however less energy is allocated to the roots since nutrients is abundant. This leads to a lower biomass in the vegetation below ground which destabilizes the banks of

1245-563: A well-mixed water column and the disappearance of the vertical salinity gradient . The freshwater-seawater boundary is eliminated due to the intense turbulent mixing and eddy effects . The lower reaches of Delaware Bay and the Raritan River in New Jersey are examples of vertically homogeneous estuaries. Inverse estuaries occur in dry climates where evaporation greatly exceeds the inflow of freshwater. A salinity maximum zone

1328-657: A while during the 1970s and 1980s, there was little economic base for the area, and it became a haven for alternative lifestylers . In recent years, however, tourism has been revived in the region. Attractions such as the great kauri trees of the Waipoua Forest (including the country's largest tree, Tane Mahuta ), the historic waterfront villages of Kohukohu and Rawene , cafes, the Horeke basalts , beaches, historic buildings, nature walks, horse trekking, boat trips, and fishing are bringing more visitors every year. In 2002

1411-436: A wholly marine embayment to any of the other estuary types. The most important variable characteristics of estuary water are the concentration of dissolved oxygen, salinity and sediment load. There is extreme spatial variability in salinity, with a range of near-zero at the tidal limit of tributary rivers to 3.4% at the estuary mouth. At any one point, the salinity will vary considerably over time and seasons, making it

1494-477: A wide effect on the surrounding water bodies.  In turn, this can decrease fishing industry sales in one area and across the country. Production in 2016 from recreational and commercial fishing contributes billions of dollars to the United States' gross domestic product (GDP). A decrease in production within this industry can affect any of the 1.7 million people the fishing industry employs yearly across

1577-548: Is a bar across the mouth. In its upper reaches the Rangiora Narrows separate the mouths of the Waihou and Mangamuka Rivers from the lower parts of the harbour. 12,000 years ago, the Hokianga was a river valley flanked by steep bush-clad hills. As the last ice age regressed, the dramatic rise in sea level slowly flooded the valley turning it into a tidal saltwater harbour with abundant sheltered deep water anchorages. This

1660-455: Is a dynamic ecosystem having a connection to the open sea through which the sea water enters with the rhythm of the tides . The effects of tides on estuaries can show nonlinear effects on the movement of water which can have important impacts on the ecosystem and waterflow. The seawater entering the estuary is diluted by the fresh water flowing from rivers and streams. The pattern of dilution varies between different estuaries and depends on

1743-679: Is both singular and plural in the Māori language, and is typically pluralised as such in English. Iwi groups trace their ancestry to the original Polynesian migrants who, according to tradition, arrived from Hawaiki . Some iwi cluster into larger groupings that are based on whakapapa (genealogical tradition) and known as waka (literally ' canoes ' , with reference to the original migration voyages ). These super-groupings are generally symbolic rather than logistical. In pre-European times, most Māori were allied to relatively small groups in

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1826-513: Is derived from the Latin word aestuarium meaning tidal inlet of the sea, which in itself is derived from the term aestus , meaning tide. There have been many definitions proposed to describe an estuary. The most widely accepted definition is: "a semi-enclosed coastal body of water, which has a free connection with the open sea, and within which seawater is measurably diluted with freshwater derived from land drainage". However, this definition excludes

1909-411: Is formed, and both riverine and oceanic water flow close to the surface towards this zone. This water is pushed downward and spreads along the bottom in both the seaward and landward direction. Examples of an inverse estuary are Spencer Gulf , South Australia, Saloum River and Casamance River , Senegal. Estuary type varies dramatically depending on freshwater input, and is capable of changing from

1992-566: Is less restricted, and there is a slow but steady exchange of water between the estuary and the ocean. Fjord-type estuaries can be found along the coasts of Alaska , the Puget Sound region of western Washington state , British Columbia , eastern Canada, Greenland , Iceland , New Zealand, and Norway. These estuaries are formed by subsidence or land cut off from the ocean by land movement associated with faulting , volcanoes , and landslides . Inundation from eustatic sea-level rise during

2075-589: Is the Colorado River Delta in Mexico, historically covered with marshlands and forests, but now essentially a salt flat. Iwi Iwi ( Māori pronunciation: [ˈiwi] ) are the largest social units in New Zealand Māori society . In Māori , iwi roughly means ' people ' or ' nation ' , and is often translated as " tribe ", or "a confederation of tribes". The word

2158-646: Is the whitefish species from the European Alps . Eutrophication reduced the oxygen levels in their habitats so greatly that whitefish eggs could not survive, causing local extinctions. However, some animals, such as carnivorous fish, tend to do well in nutrient-enriched environments and can benefit from eutrophication. This can be seen in populations of bass or pikes. Eutrophication can affect many marine habitats which can lead to economic consequences. The commercial fishing industry relies upon estuaries for approximately 68 percent of their catch by value because of

2241-748: The Holocene Epoch has also contributed to the formation of these estuaries. There are only a small number of tectonically produced estuaries; one example is the San Francisco Bay , which was formed by the crustal movements of the San Andreas Fault system causing the inundation of the lower reaches of the Sacramento and San Joaquin rivers . In this type of estuary, river output greatly exceeds marine input and tidal effects have minor importance. Freshwater floats on top of

2324-473: The Holocene epoch with the flooding of river-eroded or glacially scoured valleys when the sea level began to rise about 10,000–12,000 years ago. Estuaries are typically classified according to their geomorphological features or to water-circulation patterns. They can have many different names, such as bays , harbors , lagoons , inlets , or sounds , although some of these water bodies do not strictly meet

2407-610: The Mandovi estuary in Goa during the monsoon period. As tidal forcing increases, river output becomes less than the marine input. Here, current induced turbulence causes mixing of the whole water column such that salinity varies more longitudinally rather than vertically, leading to a moderately stratified condition. Examples include the Chesapeake Bay and Narragansett Bay . Tidal mixing forces exceed river output, resulting in

2490-640: The Mid-Atlantic coast, and Galveston Bay and Tampa Bay along the Gulf Coast . Bar-built estuaries are found in a place where the deposition of sediment has kept pace with rising sea levels so that the estuaries are shallow and separated from the sea by sand spits or barrier islands. They are relatively common in tropical and subtropical locations. These estuaries are semi-isolated from ocean waters by barrier beaches ( barrier islands and barrier spits ). Formation of barrier beaches partially encloses

2573-638: The Māngungu Mission near Horeke where 3000 were waiting. The second signing of the Treaty of Waitangi took place on 12 February 1840. With the appropriate signatures (and a few inappropriate entries) Hobson could immediately claim support from the biggest tribe in the country. While the fate of the country was being signed into history, the axemen of Hokianga scarcely missed a beat. At any one time, as many as 20 ships could be loading Hokianga timber. Whole hillsides, suddenly bared of vegetation, began to slip into

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2656-728: The Māori King Movement , though principally congregated around Waikato / Tainui , aims to transcend some iwi functions in a wider grouping. Many iwi operate or are affiliated with media organisations. Most of these belong to Te Whakaruruhau o Nga Reo Irirangi Māori (the National Māori Radio Network), a group of radio stations which receive contestable Government funding from Te Māngai Pāho (the Māori Broadcast Funding Agency) to operate on behalf of iwi and hapū . Under their funding agreement,

2739-497: The Providence responded first, and with missionary Thomas Kendall as guide and translator, crossed the bar and entered the harbour in 1822. His was the first European ship to do so, and it sailed away with the first shipment of timber from the Hokianga. His success inspired a strong following—the deforestation of Hokianga had begun and would be complete by the turn of the century. The only disincentive to Hokianga's exploitation

2822-734: The Severn Estuary in the United Kingdom and the Ems Dollard along the Dutch-German border. The width-to-depth ratio of these estuaries is typically large, appearing wedge-shaped (in cross-section) in the inner part and broadening and deepening seaward. Water depths rarely exceed 30 m (100 ft). Examples of this type of estuary in the U.S. are the Hudson River , Chesapeake Bay , and Delaware Bay along

2905-478: The black-tailed godwit , rely on estuaries. Two of the main challenges of estuarine life are the variability in salinity and sedimentation . Many species of fish and invertebrates have various methods to control or conform to the shifts in salt concentrations and are termed osmoconformers and osmoregulators . Many animals also burrow to avoid predation and to live in a more stable sedimental environment. However, large numbers of bacteria are found within

2988-638: The Hokianga, among them notably Motukauri Pã, located on a headland at the end of a tombolo between the Motuti River and Whangapapatiki Creek mouths. Wesleyan (and, later, Anglican ) missionaries were guided along the Ngāpuhi walking tracks to make their own discovery of Hokianga and its accessible timber resources. Their reports soon reached merchant captains in the Bay of Islands. Captain James Herd of

3071-412: The Hokianga, notably Ruapapaka Island , Motukaraka Island , and To Motu Island , the latter being the site of a former pā . As the Hokianga is a drowned valley, it is the mouth of numerous "tributaries", many of which retain the name river while effectively being bays or inlets. Clockwise from the mouth of the Hokianga, these include: The area around the harbour is divided in three by the estuary. To

3154-477: The Hokianga. Dame Whina Cooper was born at Te Karaka, Hokianga on 9 December 1895, the daughter of a leader of the Te Rarawa iwi . From an early age she showed an interest in local community affairs and politics, and her flair and abilities led to her becoming the undisputed Māori leader of the northern Hokianga by her mid-30s. In 1949 she moved to Auckland , and by 1951 she was elected first president of

3237-496: The Motukaraka Dairy Factory was carried there by a fleet of about fifty locally-built launches which criss-crossed the harbour daily, creating in the process a service for both passengers and freight. For half a century, the communities on both sides of the harbour were linked internally by sea transport, before improved roads in the 1950s finally displaced this energetic flotilla and the harbour once again divided

3320-578: The Surgeon Superintendent of Rawene Hospital, mounted and armed guards stood at all crossroads to turn back would-be visitors and thus restrict the spread of the disease between settlements. Travellers wishing to enter Hokianga were simply stopped at the boundary. The rule was simple: anyone could leave, but no one could enter. The local epidemic lasted six weeks and a significant number died. Each community attended to its own, and mass burials were commonplace. Few Maori deaths were recorded –

3403-400: The United States. Estuaries are incredibly dynamic systems, where temperature, salinity, turbidity, depth and flow all change daily in response to the tides. This dynamism makes estuaries highly productive habitats, but also make it difficult for many species to survive year-round. As a result, estuaries large and small experience strong seasonal variation in their fish communities. In winter,

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3486-513: The above definition of an estuary and could be fully saline. Many estuaries suffer degeneration from a variety of factors including soil erosion , deforestation , overgrazing , overfishing and the filling of wetlands. Eutrophication may lead to excessive nutrients from sewage and animal wastes; pollutants including heavy metals , polychlorinated biphenyls , radionuclides and hydrocarbons from sewage inputs; and diking or damming for flood control or water diversion. The word "estuary"

3569-499: The area, he declared that this would be the place of his return, leaving several things behind—including the bailer of his canoe. Later, Kupe's grandson Nukutawhiti returned from Hawaiki to settle in Hokianga. In the 14th century, the great chief Puhi landed just south of the Bay of Islands . The tribe of Puhi, Ngāpuhi , slowly extended westwards to reach the west coast and to colonise both sides of Hokianga. Māori regard Hokianga as one of

3652-452: The bottom where they are harmless. Historically the oysters filtered the estuary's entire water volume of excess nutrients every three or four days. Today that process takes almost a year, and sediment, nutrients, and algae can cause problems in local waters. Some major rivers that run through deserts historically had vast, expansive estuaries that have been reduced to a fraction of their former size, because of dams and diversions. One example

3735-539: The burial-areas of the ancestors . Māori author Keri Hulme 's novel The Bone People (1985) has a title linked directly to the dual meaning of bone and "tribal people". Many iwi names begin with Ngāti or with Ngāi (from ngā āti and ngā ai respectively, both meaning roughly ' the offspring of ' ). Ngāti has become a productive morpheme in New Zealand English to refer to groups of people: examples are Ngāti Pākehā ( Pākehā as

3818-540: The coastal settlements in the Hokianga and is where the base of Hokianga's community owned health services ( Hauora Hokianga) is located, on top of the hill at the Hokianga Hospital. The influenza pandemic reached Hokianga in September 1918, and remote Waiotemarama was one of the first settlements to succumb. A soup kitchen was organised in each community. On the instructions of Dr George McCall Smith ,

3901-420: The community. By 1914, a rustic telephone system linked some of the Hokianga communities with each other and with the outside world. A government-subsidised, weekly coastal shipping service ran between Onehunga and Hokianga, bringing in freight and taking away butter. The communities of Horeke and Rawene are the second- and third-oldest European settlements in New Zealand. Rawene is still the most important of

3984-409: The dissolved oxygen from the water; thus hypoxic or anoxic zones can develop. Nitrogen is often the lead cause of eutrophication in estuaries in temperate zones. During a eutrophication event, biogeochemical feedback decreases the amount of available silica . These feedbacks also increase the supply of nitrogen and phosphorus, creating conditions where harmful algal blooms can persist. Given

4067-401: The effects of modifying the estuarine circulation. Fjord -type estuaries are formed in deeply eroded valleys formed by glaciers . These U-shaped estuaries typically have steep sides, rock bottoms, and underwater sills contoured by glacial movement. The estuary is shallowest at its mouth, where terminal glacial moraines or rock bars form sills that restrict water flow. In the upper reaches of

4150-601: The estuary impacted by human activities, and over time may shift the basic composition of the ecosystem, and the reversible or irreversible changes in the abiotic and biotic parts of the systems from the bottom up. For example, Chinese and Russian industrial pollution, such as phenols and heavy metals, has devastated fish stocks in the Amur River and damaged its estuary soil. Estuaries tend to be naturally eutrophic because land runoff discharges nutrients into estuaries. With human activities, land run-off also now includes

4233-424: The estuary, the depth can exceed 300 m (1,000 ft). The width-to-depth ratio is generally small. In estuaries with very shallow sills, tidal oscillations only affect the water down to the depth of the sill, and the waters deeper than that may remain stagnant for a very long time, so there is only an occasional exchange of the deep water of the estuary with the ocean. If the sill depth is deep, water circulation

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4316-776: The estuary, with only narrow inlets allowing contact with the ocean waters. Bar-built estuaries typically develop on gently sloping plains located along tectonically stable edges of continents and marginal sea coasts. They are extensive along the Atlantic and Gulf coasts of the U.S. in areas with active coastal deposition of sediments and where tidal ranges are less than 4 m (13 ft). The barrier beaches that enclose bar-built estuaries have been developed in several ways: Fjords were formed where Pleistocene glaciers deepened and widened existing river valleys so that they become U-shaped in cross-sections. At their mouths there are typically rocks, bars or sills of glacial deposits , which have

4399-619: The first walking tracks were opened at the Wairere Boulders allowing a close inspection of the basalt rocks in the Wairere valley. Hokianga offers varied and interesting accommodation for all styles and budgets for travelers who prefer a quieter holiday than the busier east coast offers. A visit to the Hokianga is to see what New Zealand was like in previous decades with unspoiled landscapes. Three iconic and very different figures in New Zealand history have been closely associated with

4482-609: The fish community is dominated by hardy marine residents, and in summer a variety of marine and anadromous fishes move into and out of estuaries, capitalizing on their high productivity. Estuaries provide a critical habitat to a variety of species that rely on estuaries for life-cycle completion. Pacific Herring ( Clupea pallasii ) are known to lay their eggs in estuaries and bays, surfperch give birth in estuaries, juvenile flatfish and rockfish migrate to estuaries to rear, and anadromous salmonids and lampreys use estuaries as migration corridors. Also, migratory bird populations, such as

4565-467: The form of hapū ( ' sub-tribes ' ) and whānau ( ' family ' ). Each iwi contains a number of hapū ; among the hapū of the Ngāti Whātua iwi, for example, are Te Uri-o-Hau , Te Roroa , Te Taoū , and Ngāti Whātua-o-Ōrākei . Māori use the word rohe to describe the territory or boundaries of iwi. In modern-day New Zealand , iwi can exercise significant political power in

4648-400: The great biodiversity of this ecosystem. During an algal bloom , fishermen have noticed a significant increase in the quantity of fish. A sudden increase in primary productivity causes spikes in fish populations which leads to more oxygen being utilized. It is the continued deoxygenation of the water that then causes a decline in fish populations. These effects can begin in estuaries and have

4731-506: The growing New Zealand Māori population tried to keep a connection to their culture, family history, spirituality, community, language and iwi . The Victoria University of Wellington Te Reo Māori Society campaigned for Māori radio, helping to set up Te Reo o Poneke, the first Māori-owned radio operation, using airtime on Wellington student-radio station Radio Active in 1983. Twenty-one iwi radio stations were set up between 1989 and 1994, receiving Government funding in accordance with

4814-642: The harbour is Te Hokianga-nui-a-Kupe  — "the place of Kupe's great return". The Hokianga is in the Far North District , which is in the Northland Region . The area is 120 kilometres (75 mi) northwest of Whangārei City—and 40 kilometres (25 mi) west of Kaikohe —by road. The estuary extends inland for 30 kilometres (19 mi) from the Tasman Sea . It is navigable for small craft for much of its length, although there

4897-467: The harbour, choking its tributaries with mud. The relationship between Māori and Pākehā (European) settlers was frequently tense, never more so than during the Dog Tax War of the 1890s, which largely centred around Hokianga. By 1900, the bulk of the forest had sailed over the bar and the little topsoil that remained was turned to dairy farming for butter production. Most of the cream delivered to

4980-420: The impacts do not end there. Plant death alters the entire food web structure which can result in the death of animals within the afflicted biome . Estuaries are hotspots for biodiversity , containing a majority of commercial fish catch, making the impacts of eutrophication that much greater within estuaries. Some specific estuarine animals feel the effects of eutrophication more strongly than others. One example

5063-614: The management of land and of other assets. For example, the 1997 Treaty of Waitangi settlement between the New Zealand Government and Ngāi Tahu , compensated that iwi for various losses of the rights guaranteed under the Treaty of Waitangi of 1840. As of 2019 the tribe has collective assets under management of $ 1.85 billion. Iwi affairs can have a real impact on New Zealand politics and society. A 2004 attempt by some iwi to test in court their ownership of

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5146-525: The many chemicals used as fertilizers in agriculture as well as waste from livestock and humans. Excess oxygen-depleting chemicals in the water can lead to hypoxia and the creation of dead zones . This can result in reductions in water quality, fish, and other animal populations. Overfishing also occurs. Chesapeake Bay once had a flourishing oyster population that has been almost wiped out by overfishing. Oysters filter these pollutants, and either eat them or shape them into small packets that are deposited on

5229-422: The marine environment, such as plastics , pesticides , furans , dioxins , phenols and heavy metals . Such toxins can accumulate in the tissues of many species of aquatic life in a process called bioaccumulation . They also accumulate in benthic environments, such as estuaries and bay muds : a geological record of human activities of the last century. The elemental composition of biofilm reflect areas of

5312-575: The marsh causing increased rates of erosion . A similar phenomenon occurs in mangrove swamps , which are another potential ecosystem in estuaries. An increase in nitrogen causes an increase in shoot growth and a decrease in root growth. Weaker root systems cause a mangrove tree to be less resilient in seasons of drought, which can lead to the death of the mangrove. This shift in above ground and below ground biomass caused by eutrophication could hindered plant success in these ecosystems. Across all biomes, eutrophication often results in plant death but

5395-455: The new Māori Women's Welfare League. The league's success was largely due to Whina's efforts, and she became well known throughout the country. In 1957 she stepped down as president and the annual conference rewarded her with the title Te Whaea o te Motu ("Mother of the Nation"). Whina Cooper continued to work for the community throughout the 1960s, but it was her 1975 leadership of a hīkoi –

5478-527: The northern side was ripe for conversion. His remains, recently claimed by Ngāpuhi, lie buried where the mission began. Today the harbour, like the Reformation itself, stands between Protestant and Catholic. The lawyer and naturalist Sir Walter Lawry Buller was born in Hokianga in 1838. Within six days of the Waitangi signing , Governor Hobson , keen to secure full Ngāpuhi support, trekked across to

5561-440: The now off-balance nitrogen cycle , estuaries can be driven to phosphorus limitation instead of nitrogen limitation. Estuaries can be severely impacted by an unbalanced phosphorus cycle, as phosphorus interacts with nitrogen and silica availability. With an abundance of nutrients in the ecosystem, plants and algae overgrow and eventually decompose, which produce a significant amount of carbon dioxide. While releasing CO 2 into

5644-481: The oldest settlements in Aotearoa , and it remains a heartland for the people. Rahiri, the 17th-century founder of the Ngāpuhi iwi , was born at Whiria pā to the south of the harbour, where a monument stands to his memory. In the course of expansion, Ngāpuhi created and maintained over centuries a complex network of walking tracks, many of which evolved into today's roads. More than a dozen pā sites lie close to

5727-577: The schooner Isabella de Fraine , lost with all eight crew in July 1928 after capsizing on the bar at the entrance to the harbour. In 1837, a French adventurer, the self-titled Baron Charles de Thierry , sailed with 60 settlers into this hive of export activity to claim an immense tract of land that he believed he had purchased 15 years earlier in exchange for 36 axes. He was eventually granted about 1,000 acres (4 km) at Rangiahua where he set up his colony, declaring himself "Sovereign Chief of New Zealand",

5810-399: The seabed and foreshore areas polarised public opinion (see New Zealand foreshore and seabed controversy ). In Māori and in many other Polynesian languages , iwi literally means ' bone ' derived from Proto-Oceanic * suRi ₁ meaning ' thorn, splinter, fish bone ' . Māori may refer to returning home after travelling or living elsewhere as "going back to the bones" — literally to

5893-427: The seawater in a layer that gradually thins as it moves seaward. The denser seawater moves landward along the bottom of the estuary, forming a wedge-shaped layer that is thinner as it approaches land. As a velocity difference develops between the two layers, shear forces generate internal waves at the interface, mixing the seawater upward with the freshwater. An examples of a salt wedge estuary is Mississippi River and

5976-411: The sediment which has a very high oxygen demand. This reduces the levels of oxygen within the sediment often resulting in partially anoxic conditions, which can be further exacerbated by limited water flow. Phytoplankton are key primary producers in estuaries. They move with the water bodies and can be flushed in and out with the tides . Their productivity is largely dependent upon the turbidity of

6059-620: The south are the settlements of Waimamaku , Ōmāpere , Opononi , Pakanae , Koutu , Whirinaki , Rawene , Omanaia , Waima , and Taheke ; to the north are Broadwood , Pawarenga , Panguru , Mitimiti , and Rangi Point ; and at the top of the harbour upstream from the narrows are Horeke , Kohukohu , and Mangamuka . According to Te Tai Tokerau tradition, Kupe and Ngāhue , the legendary Polynesian navigators and explorers , settled in Hokianga in approximately 925 AD, after their journey of discovery from Hawaiki aboard their waka (canoe) named Matahorua and Tāwhirirangi . When Kupe left

6142-483: The stations must produce programmes in the local Māori language and actively promote local Māori culture. A two-year Massey University survey of 30,000 people published in 2003 indicated 50 per cent of Māori in National Māori Radio Network broadcast areas listened to an iwi station. An Auckland University of Technology study in 2009 suggested the audience of iwi radio stations would increase as

6225-408: The traditional tribal territory and these will have difficulties, which in many cases will be severe, in both relating to their tribal heritage and in accessing benefits from the settlement. It is also said that many Maori reject tribal affiliation because of a working-class unemployed attitude, defiance and frustration. Related but less important factors, are that a hapu may belong to more than one iwi,

6308-486: The true impact of the epidemic on Maori is unknown. The first major industry of the region was based around the kauri trees, both logging and the gum, the strong thick resin which came from the trees. After the forests started to thin, dairying and cheese production took over as the mainstay of the economy, but they too fell away after the closure of the Motukaraka Dairy Cooperative in 1953. For

6391-456: The volume of freshwater, the tidal range, and the extent of evaporation of the water in the estuary. Drowned river valleys are also known as coastal plain estuaries. In places where the sea level is rising relative to the land, sea water progressively penetrates into river valleys and the topography of the estuary remains similar to that of a river valley. This is the most common type of estuary in temperate climates. Well-studied estuaries include

6474-453: The water and atmosphere, these organisms are also intaking all or nearly all of the available oxygen creating a hypoxic environment and unbalanced oxygen cycle . The excess carbon in the form of CO 2 can lead to low pH levels and ocean acidification , which is more harmful for vulnerable coastal regions like estuaries. Eutrophication has been seen to negatively impact many plant communities in estuarine ecosystems . Salt marshes are

6557-835: The water. The main phytoplankton present are diatoms and dinoflagellates which are abundant in the sediment. A primary source of food for many organisms on estuaries, including bacteria , is detritus from the settlement of the sedimentation. Of the thirty-two largest cities in the world in the early 1990s, twenty-two were located on estuaries. As ecosystems, estuaries are under threat from human activities such as pollution and overfishing . They are also threatened by sewage, coastal settlement, land clearance and much more. Estuaries are affected by events far upstream, and concentrate materials such as pollutants and sediments. Land run-off and industrial, agricultural, and domestic waste enter rivers and are discharged into estuaries. Contaminants can be introduced which do not disintegrate rapidly in

6640-699: Was made law, but on 9 March she was found dead in a rock crevice at Koutu Point. It is suspected that she was killed accidentally by fishermen fishing with gelignite . Her death was reported nationwide, and she was buried with full Māori honours in a special plot next to the town hall. There are composite (years 1–15) schools at Opononi , Panguru and Broadwood . There are also primary schools at Mangamuka , Horeke , Kohukohu , Matihetihe , Omanaia , Pawarenga , Rawene , Waimā , Whirinaki , and Umawera . 35°31′33″S 173°22′43″E  /  35.5258°S 173.3786°E  / -35.5258; 173.3786 Estuary Most existing estuaries formed during

6723-445: Was presumed to be male. Unlike the majority of dolphins, she had no qualms about human company, and would perform stunts for locals, play with objects like beach balls and beer bottles, and allow children to swim alongside her and make contact. The dolphin became a local celebrity but news of her soon spread, and visitors from throughout the country would come to watch her. On 8 March 1956 official protection for Opo, requested by locals,

6806-550: Was the harbour bar. Of the hundreds of ships that successfully negotiated it, records show that 16 were lost. Most came to grief when leaving fully laden, becoming caught in the wind shadow cast by South Head, where deep water lay. A temporary lull or change in wind direction could cause a sailing ship to lose steerage way and be swept onto the rocky shore. In 1828, the missionary schooner Herald , built by Henry Williams and sailed by Gilbert Mair , foundered while trying to enter Hokianga Harbour. The last recorded shipwreck involved

6889-453: Was the harbour that the explorer Kupe left from, and in 1822 it was home to the first European timber entrepreneurs. southern right whales possibly frequented the bay historically, prior to significant depletion of the species caused by commercial and illegal hunting. Today, large whales are rarely seen in the bay, although the harbour is a well-regarded area in which to watch smaller dolphins and killer whales . Numerous small islands dot

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