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

从1979年开始，在巴西亚马逊的玛瑙斯附近，雨林砍伐产生了一系列的森林碎片。对这些碎片的研究始于它们还与森林有关的时候，对热带雨林损失的后果产生了重要的见解。许多鸟类在碎片中灭绝，导致碎片中的群落与未受干扰的森林相比大不相同。正如预期的那样，影响在最小的片段（1-10公顷）中最为明显，但在较大的100公顷片段中也有物种消失。研究还发现，随着时间的推移，碎片上的鸟类群落随着周围毁林地区植被的再生或清除而发生变化。到目前为止，大多数结果都来自一个标准化的采样项目，即在接近地面的地方捕获（然后释放）鸟类。在接下来的五年里，这种采样将继续进行，但将增加额外的技术来描述碎片和控制地点的整个鸟类群落。鸟类如何利用碎片周围的森林再生也将被研究。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，并将提供关于如何管理再生和森林斑块使鸟类受益的信息。

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.