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Large-scale habitat selection by parrots in New Caledonia

journal contribution
posted on 2023-05-17, 06:14 authored by Legault, A., Chartendrault, V, Theuerkauf, J, Rouys, S, Barre, N
Habitat studies are important for conservation, particularly for parrots, as many are threatened and their ecological requirements are often poorly known. Our aim was to contribute to the conservation of parrots in New Caledonia by examining their selection of habitat at a large scale. From 2002 to 2010, we documented 1,357 encounters with New Caledonian Parakeets (Cyanoramphus saisseti), Horned Parakeets (Eunymphicus cornutus), and New Caledonian Rainbow Lorikeets (Trichoglossus haematodus deplanchii) throughout mainland New Caledonia. We used GIS to infer habitat selection in relation to vegetation, forest cover, forest size, altitude, rainfall, and soil. New Caledonian Parakeets selected forested areas with oligotrophic soils, particularly those from ultramafic substrates. Horned Parakeets selected habitats with a high proportion of rainforest, as well as oligotrophic soils on metamorphic substrates, yet soil fertility was less important for them. Both parakeet species favoured large forests, and appeared to avoid areas with low forest cover. Altitude had a relatively minor influence upon habitat selection by parakeets. Rainbow Lorikeets favoured areas at low altitudes with minimal rainfall and mesotrophic soils, although they were not influenced by soil fertility to the same degree as the parakeets. We consider rainforests on oligotrophic soils at intermediate altitudes (200–800 m) to be most important for parrot conservation in New Caledonia, as these habitats are likely to support significant parakeet populations.

History

Publication title

Journal of Ornithology

Volume

152

Pagination

409-419

ISSN

0021-8375

Department/School

School of Natural Sciences

Publisher

Blackwell Verlag Gmbh

Place of publication

Kurfurstendamm 57, Berlin, Germany, D-10707

Rights statement

The definitive published version is available online at: http://onlinelibrary.wiley.com/

Repository Status

  • Restricted

Socio-economic Objectives

Terrestrial biodiversity

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