Habitat selection and population trends in terrestrial bird species of Robinson Crusoe Island: habitat generalists versus forest specialists
Habitat selection and population trends in terrestrial bird species of Robinson Crusoe Island: habitat generalists versus forest specialists
复制标题
鲁滨逊漂流岛陆生鸟类的栖息地选择和种群趋势:栖息地通才与森林专家
DOI:
10.1007/s10531-011-0109-x
复制
发表时间:
2011
影响因子:
3.4
通讯作者:
Römer
中科院分区:
文献类型:
--
作者:
Vergara;Römer
Habitat loss and degradation on oceanic islands are key processes leading to population decline of endemic birds and facilitating the establishment of invasive bird species. In this study, carried out in the Robinson Crusoe Island, we assessed density and habitat selection of terrestrial bird species, including juan fernandez firecrown and juan fernandez tit-tyrant, two endemics, as well as green-backed firecrown and austral thrush, which apparently originate from the mainland. Results show that perturbed habitats contained a low density of the endemic species whereas the mainland species were significantly more abundant in perturbed scrub habitats. Bird species show different habitat selection patterns, with endemics selecting for native forest and mainland species selecting for perturbed habitats, or using them at random. Bird species experienced temporal trends in their overall population sizes, with the endemic tit-tyrant suffering a significant decline in its population size of about 63% between 1994 and 2009. Only mainland species exhibited temporal changes in habitat use, significantly reducing their densities in the preferred scrub habitats, possibly as a response to decreased habitat quality. Thrushes apparently were able to compensate the population decrease in one non native habitat type by using native forests, a habitat giving them the opportunity of preying on nests of endemic species. We conclude that endemic bird species behave as specialists whereas the mainland species must be treated as invasive generalists on Robinson Crusoe Island.
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DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
E. Hagen
通讯作者:
E. Hagen
DOI:
--
发表时间:
2000
期刊:
影响因子:
--
作者:
J. Jiménez
通讯作者:
J. Jiménez
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
P. Vergara;J. Pizarro;S. Castro
通讯作者:
S. Castro
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
Guillermo C. Amico;Marcelo A. Aizen
通讯作者:
Marcelo A. Aizen
影响因子:
8.8
作者:
Clark, JS
通讯作者:
Clark, JS