LTREB: Long-term Community Responses to Landscape Dynamics by Birds in Amazonian Rainforest Fragments

从1979年开始，雨林砍伐在巴西亚马逊的马瑙斯附近产生了一系列森林碎片。 对这些碎片的研究始于它们仍然与森林相连的时候，对热带雨林丧失的后果产生了重要的见解。 许多鸟类物种在碎片中灭绝，导致碎片中的群落与未受干扰的森林相比有很大不同。 正如预期的那样，在1-10公顷的最小碎片中，影响最为明显，但在100公顷的较大碎片中也有物种消失。 研究还发现，碎片中的鸟类群落随着时间的推移而发生变化，以应对周围森林砍伐地区的植被重新生长或清除。 到目前为止，大多数结果都来自于一个标准化的采样程序，即在地面附近捕获（然后释放）鸟类。 在接下来的五年里，这种采样将继续下去，但将增加额外的技术来描述整个鸟类群落的片段和控制网站。 鸟类如何利用森林再生周围的碎片也将被检查。 这项研究将有助于了解30年的景观变化如何影响世界上最多样化的鸟类群落，并将提供有关再生和森林斑块管理如何使鸟类受益的信息。

Beginning in 1979, rainforest cutting produced a series of forest fragments near Manaus, in the Brazilian Amazon. Research in the fragments, which began while they were still connected to forest, has produced important insights into the consequences of rainforest loss in the tropics. Many bird species went extinct in fragments, resulting in much different communities in fragments compared to undisturbed forest. As expected, effects were most pronounced in the smallest fragments, 1-10 ha, but species were also lost from the larger 100 ha fragments. It was also found that the bird communities in the fragments changed over time in response to the regrowth or clearing of vegetation in the deforested areas surrounding them. Most results so far have come from a standardized program of sampling by catching (then releasing) birds near ground level. Over the next five years, this sampling will be continued, but additional techniques will be added to describe the entire bird community in fragments and control sites. How birds use forest regrowth surrounding fragments will also be examined. This research will contribute to an understanding of how 30 years of landscape change affects the world's most diverse bird community, and will provide information on how management of regrowth and forest patches can benefit birds.