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Ecosystem management on Amami Island, considering community processes.

奄美岛的生态系统管理，考虑到社区进程。

基本信息

批准号：
15310160
负责人：
ISHIDA Ken
金额：
$ 4.42万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15310160/
关键词：
Ecosystem Management Adaptive management Community process Food web Alien mammals Amami-oshima Island Biodiversity Ecosystem model 多来種

项目摘要

Amami-oshima Island locates about 300km south-west from Kyushu Is., and north-eastern edge of Oriental Region. There are many endemic species, such as Pentalagus furnessi, Garrulus Iidthi, Zoothera major, and Babina subaspera. In 1990's alien Herpestes javanicus expanded its distribution within this Island, and in the high density area of this alien predator mammal, the number of many endemic animal species has decreased or even disappeared. Ministry of the Environment, Japan, has been controlling H.javanicus population since 2000 and targeting its eradication from this island. There are sometimes alien Rattus rattus in the forest, which is usually an important winter prey of H.javanicus. There may be also some indirect effects of H.javanicus population change through R.rattus and other intermediate native predators on the lower prey species. There are annual fluctuation of acorns and R.rattus and several native animals depend on acorns much. The ecosystem of the forest on Amami Island is dynamic and complicated. Understanding its processes is interesting and important to conserve the nature. We investigated the animal density, observed and hypothetic food web, and present problems of its conservation in terms of the ecosystem restoration measurements.

奄美大岛位于九州西南约300公里处，和东方区东北边缘。有许多特有的物种，如Pentalagus speessi，Garrulus Iidthi，Zooothera major和Babina subaspera。20世纪90年代外来的爪哇疱疹病毒在本岛的分布范围扩大，在这种外来捕食性哺乳动物的高密度区，许多特有动物的数量减少甚至消失。日本环境省自2000年以来一直在控制爪哇血吸虫的数量，并将其从这个岛上消灭。森林中有时会有外来的鼠，这通常是一个重要的冬季猎物H.javanicus。也可能有一些间接的影响，爪哇血吸虫种群的变化，通过R.rattus和其他中间的本地捕食者对较低的猎物物种。橡子的数量有年变化，家鼠和几种当地动物对橡子的依赖性很强。奄美大岛的森林生态系统是动态的、复杂的。了解它的过程是有趣的，重要的是保护自然。我们调查了动物密度，观察和假设的食物网，并提出了生态系统恢复措施方面的保护问题。