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Zealandia (wildlife sanctuary)

Coordinates: 41°17′40″S 174°45′00″E / 41.29444°S 174.75000°E / -41.29444; 174.75000
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Zealandia
Zealandia from Tinakori Hill
Zealandia on the edge of suburban Wellington
Map
TypeWildlife sanctuary
LocationWellington, New Zealand
Coordinates41°17′40″S 174°45′00″E / 41.29444°S 174.75000°E / -41.29444; 174.75000
Area225 ha (560 acres)
Created1999 (1999)
Owned byWellington City Council
Operated byKarori Sanctuary Trust
OpenAll year around except 25 December
Websitewww.visitzealandia.com

Zealandia, formerly known as the Karori Wildlife Sanctuary,[1] is a protected natural area in Wellington, New Zealand, the first urban completely fenced ecosanctuary,[2] where the biodiversity of 225 ha (just under a square mile) of forest is being restored. The sanctuary was previously part of the water catchment area for Wellington, between Wrights Hill (bordering Karori) and the Brooklyn wind turbine on Polhill.

Map of Zealandia

Most of New Zealand's ecosystems have been severely modified by the introduction of land mammals that were not present during the evolution of its ecosystems, and have had a devastating impact on both native flora and fauna. The sanctuary, surrounded by a pest-exclusion fence, is a good example of an ecological island, which allows the original natural ecosystems to recover by minimising the impact of introduced flora and fauna.

The sanctuary has become a significant tourist attraction in Wellington and is responsible for the greatly increased number of sightings of species such as tūī and kākā in city's suburbs.

Sometimes described as the world's first mainland island sanctuary in an urban environment,[3][4] the sanctuary has inspired many similar projects throughout New Zealand, with predator-proof fences now protecting the biodiversity of many other areas of forest. Examples include the 7.7-hectare (19-acre) lowland podocarp forest remnant of Riccarton bush/Putaringamotu, the 98-hectare (240-acre) Bushy Park, and the 3,500-hectare (8,600-acre) Maungatautari Restoration Project enclosing an entire mountain.

History

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Visitor Centre

Historically about 60% of the Wellington region was covered with broadleaf forest. Karaka, kohekohe, ngaio and nīkau trees were common but there were also rātā, rewarewa and tawa with occasional podocarps like kahikatea and rimu.[5] The whole sanctuary valley was covered with this sort of forest until European settlement of the area and the large fires in 1850 and 1860 that cleared the land to be used for farming. The lower reservoir, retained by an earth dam, was completed in 1878.[6] Parts of the area continued to be farmed up until 1906 when the remaining catchment was purchased for the water works.[6] The upper reservoir, retained by a concrete gravity arch dam, was completed in 1908.[7] From this point, as the whole valley was a protected water catchment area for Wellington city, the slopes were re-vegetated with introduced trees and the native forest also began regenerating. The upper dam was decommissioned as a reservoir about 1991, the lower one in 1997.[6]

Jim Lynch promoted the idea of a wildlife sanctuary. The "Natural Wellington" project identified the reservoir catchment as having special significance because it is a large self-contained habitat suitable for a wide variety of native plants and animals. In 1993 a feasibility study was carried out by the Wellington regional and city councils and after public consultation in 1994, the idea of a sanctuary was given the go-ahead. The Karori Wildlife Sanctuary Trust was formed in mid-1995 to implement the proposed 'mainland island' wildlife sanctuary.[8][9] The land was transferred from the Greater Wellington Regional Council to Wellington City Council in 2004.[10] The Karori Sanctuary Trust became a council-controlled organisation of Wellington City Council in October 2016, and is part-funded by the council.[11]

Pest-exclusion fence

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A stretch of the fence

The most crucial aspect of the sanctuary is a pest-exclusion fence, designed to exclude 14 species of non-native land mammals ranging from deer to mice, which encircles the 8.6-kilometre (5.3 mi) perimeter of the sanctuary.[12] Construction of the fence was completed in late 1999 and all mammalian pests within the perimeter were then eradicated over a nine-month period. This predator-proof fence is of great conservation significance, being a world first design to bar all terrestrial mammals from mouse size up.[13]


Species to be excluded by the fence

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Stoat running off after being unable to find a way through the fence.

The fence design was arrived at after trials with the various species to be excluded.[14] Its main features are a small mesh size (to exclude animals down to the size of a mouse), a curved top-cap (to prevent animals climbing over) and an underground foot (to prevent animals burrowing underneath).[12]

  • Mesh size
    Mesh size
  • Top cap detail
    Top cap detail
  • Footer
    Footer
Example of a small defect in fence mesh

In terms of its meeting conservation goals, the sanctuary has met with considerable success due to the design of the perimeter fence. The fence and ongoing monitoring have successfully kept the sanctuary free of all but the smallest species – the house mouse. It is thought that small defects in the fence mesh (damaged during construction) allowed mice to re-enter the sanctuary. Modifications to the fence have been considered in an attempt to permanently exclude mice, but meanwhile, mouse numbers are monitored and controlled. There have been occasional breaches of the fence by weasels and rats, these occasional incursions are not unexpected (for example resulting from storm damage bringing trees down upon the fence), and are picked up by on-going monitoring with tracking tunnels.[15][16]

Restoration

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Lower Karori Reservoir looking north-east
Upper Karori Reservoir

The flora and fauna in the sanctuary are recovering from its pre-managed degraded state. Although the original primary forest has been regenerating since 1906, it is still only in the early stages of succession with small hardy trees such as mahoe dominating. Members of the original flora that are missing from the site, or rare, include large podocarp species such as rimu, matai, miro, kahikatea, and tōtara, are being re-established. Northern rātā has also virtually disappeared from the valley and a number of seedlings have been planted. A wide variety of native trees, of benefit to native fauna, is already present. This includes a mature colony of the New Zealand fuchsia (kōtukutuku) (Fuchsia excorticata).

Species

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Toutouwai, one of the many birds free to breed in the sanctuary and re-populate the surrounding environment
  • Native birds that have been released in the sanctuary since 2000 include:
    • Bellbird, New Zealand (korimako) (Anthornis melanura)
    • Brown teal (pāteke) (Anas chlorotis) (four pairs released 2000-11-03)
    • Kākā, North Island (Nestor meridionalis) (three released 2002-08-24)
    • Kākāriki, red-fronted parakeet (Cyanoramphus novaezelandiae) (23 released 2010-July-02)
    • Little spotted kiwi (kiwi pukupuku) (Apteryx owenii) (20 released 2000-07-04)
    • Pigeon, New Zealand (kererū) (Hemiphaga novaeseelandiae) (10 released 2002 to 2005)
    • Robin, North Island (toutouwai) (Petroica longipes) (40 released 2001-05-11)
    • Saddleback, North Island (tīeke) (Philesturnus rufusater) (39 released 2002-06-16)
    • Scaup, New Zealand (papango) (Aythya novaeseelandiae) (one pair released 2002-05-03)
    • Stitchbird (hihi) (Notiomystis cincta) (30 released 2005-02-17)
    • Takahē, South Island (Porphyrio hochstetteri) (two released 2011-01-28)
    • Tomtit, North Island (miromiro) (Petroica macrocephala toitoi)
    • Weka, North Island (Gallirallus australis) (four pairs released 2000-06-16)
    • Whitehead (pōpokatea) (Mohoua ochrocephala) (released 2001, 2002)
    • Rifleman (tītipounamu) (Acanthisitta chloris) (60 birds released 2019)
  • Other native animals that have been released since 2000 include:
  • Other native species that are naturalised without needing transfers from outside the area include:

Awards

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View of Wellington from Zealandia

In 2023, Zealandia won the Supreme Tourism Award at the New Zealand Tourism Awards. It also won the Airbnb Tourism Excellence Award for Small to Medium businesses. The chief executive of Tourism Industry Aotearoa, Rebecca Ingram, said about the award: “Zealandia is everything we love about tourism: protecting our wildlife, telling our unique story, thrilling visitors and beloved by its community.”[22]

References

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  1. ^ "Wildlife reserve our new Zealandia". The Dominion Post. Wellington. 3 December 2008. Retrieved 1 October 2010.
  2. ^ "Home – Zealandia". Visit Zealandia. Zealandia. Retrieved 3 October 2018. Zealandia is the world's first fully-fenced urban ecosanctuary
  3. ^ Helen Clark (7 December 2005). "Karori Wildlife Sanctuary Trust 10 year anniversary". beehive.govt.nz. Retrieved 1 August 2017.
  4. ^ Kate Guthrie (4 August 2016). "Doing the sums – what are the best predator control options?". Predator free NZ. Retrieved 1 August 2017.
  5. ^ Bain, Helen (November 2006). "Natural Capital". Forest & Bird (322). Royal Forest and Bird Protection Society of New Zealand Inc.: 33–35. ISSN 0015-7384.
  6. ^ a b c New Zealand Historic Places Trust. "Lower Karori Dam". The Register. New Zealand Historic Places Trust. Retrieved 1 August 2017.
  7. ^ "The New Reservoir". The Evening Post. LXXV (62): 3. 13 March 1908.
  8. ^ Lynch, Jim (February 1995). "Back to the Future". Forest & Bird (275). Royal Forest and Bird Protection Society of New Zealand Inc.: 12–19. ISSN 0015-7384.
  9. ^ Lynch, Jim. "Jim's story: the founding of Karori Sanctuary Trust". visitzealandia.com. Karori Wildlife sanctuary Trust. Archived from the original on 25 November 2015. Retrieved 25 November 2015.
  10. ^ "Karori Wildlife Sanctuary celebrates land transfer" (Press release). Karori Wildlife Sanctuary. Scoop. 16 September 2004. Retrieved 18 July 2023.
  11. ^ Statement of Intent 2020–2021: Karori Sanctuary Trust (PDF). Karori Sanctuary Trust. 2020. p. 23. Retrieved 18 July 2023.
  12. ^ a b "Zealandia Karori Sanctuary Wellington New Zealand Our Fence". Karori Sanctuary Trust website. Karori Wildlife Sanctuary Trust. 2011. Archived from the original on 15 March 2012. Retrieved 1 August 2017.
  13. ^ David Attenborough (November 2000). State of the Planet. BBC Natural History Unit. Retrieved 15 July 2011.
  14. ^ Karori Wildlife Sanctuary Trust (1 November 1999). "Pest Eradication – main stage complete". Press release 1 November 1999. Karori Wildlife Sanctuary Trust. p. 3. Archived from the original on 15 December 2000. Retrieved 1 August 2017. remove ... (possums, norway rats and ship rats, mice, hedgehogs, wild cats, rabbits, hares, stoats, weasels, ferrets, goats, pigs and fallow deer)
  15. ^ McIntosh-Ward, Nancy (9 July 2004). "Karori Wildlife Sanctuary Biosecurity Programme Detects Weasel". Press releases. Karori Wildlife Sanctuary Trust. Archived from the original on 13 December 2004. Retrieved 1 August 2017.
  16. ^ "Sanctuary showdown: intruder apprehended". Press releases. Karori Wildlife Sanctuary Trust. 22 February 2008. Archived from the original on 15 May 2008. Retrieved 1 August 2017.
  17. ^ Burns, Rhys J; Bell, Ben D; Haih, Amanda; Bishop, Phillip; Easton, Luke; Wren, Sally; Germano, Jennifer; Hitchmough, Rodney A; Rofe, Jeremy; Makan, Troy (2017). "Conservation status of New Zealand amphibians, 2017" (PDF). New Zealand Threat Classification Series (25): 7.
  18. ^ Louise Slocombe (21 August 2018). "Meet our Newest Arrivals". ZEALANDIA. Retrieved 17 October 2018. Two hundred kākahi (New Zealand freshwater mussels) have just been translocated from Wairarapa Moana and the Parangarahu lakes to the Upper Lake with the help of iwi partners,
  19. ^ Romijn, Richard (22 December 2004). "More species of lizards found in Karori Wildlife Sanctuary". Press releases. Karori Wildlife Sanctuary Trust. Archived from the original on 1 October 2006. Retrieved 1 August 2017.
  20. ^ Green, Kate (23 March 2021). "Zealandia reservoir to be drained to remove a tonne of pesky perch". Stuff. Retrieved 30 May 2021.
  21. ^ Johnson, Jacob (1 May 2021). "Zealandia's perch eradication project underway to get rid of 22,000 fish". TVNZ. Retrieved 30 May 2021.
  22. ^ Knell, Conor (8 November 2023). "Zealandia wins national tourism award". www.thepost.co.nz. Retrieved 12 January 2024.
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