期刊
JOURNAL OF TROPICAL ECOLOGY
卷 23, 期 -, 页码 27-33出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0266467406003671
关键词
deforestation; habitat disturbance; predation; reproductive success; South-East Asia; tropics
类别
One possible mechanism underlying species losses in the tropics is an increase in predation due to habitat degradation. Relative levels of predation at three heights (ground. 1-1.5 m. > 5 in for nests and > 3 In for caterpillars) were compared across a gradient of disturbance in the Subic Bay Watershed Forest Reserve. Philippines over a 2-mo period. Four 750-m transects were established in each habitat type (closed-canopy forest, open-canopy forest, rural areas) where artificial nests and caterpillar models were placed within 10m-radius plots and checked after it 5-d exposure period. Nests in open-canopy forest were least predated (16.7%,). with predation in rural areas (58.3%) being higher than in closed-canopy forest (32.8%). Predation nests at 1-1.5 in was significantly lower than ground nests. General linear mixed model analysis suggested that effects of habitat type on nest predation differed among heights. Attacks on caterpillars increased with disturbance (46.1-59.4%), but height was not found to have a significant effect on predation. Markings on plasticine models. camera traps and live traps were used to establish possible predators. Shifts in predator dominance among the habitats were observed. vegetation cover, tree density and small mammal abundance were not correlated with mean predation in the transects.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据