DISPERSAL OF MELASTOME SEEDS BY FRUIT‐EATING BIRDS OF TROPICAL FOREST UNDERSTORY
DISPERSAL OF MELASTOME SEEDS BY FRUIT‐EATING BIRDS OF TROPICAL FOREST UNDERSTORY
复制标题
热带森林林下食果鸟类对油菜种子的传播
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
J. Blake
中科院分区：
文献类型：
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作者：
Bette A. Loiselle;J. Blake
鸟类通过以下方式直接影响种子传播：（1）它们带走的种子数量以及（2）这些种子沉积的地点和条件。传播有效性是种子传播的这些质量和数量组成部分的综合。在这项研究中，确定了六种鸟类为野牡丹科四种灌木去除的种子数量和种子沉积模式。鸟类在种子传播的数量和质量方面存在差异。对种子传播的数量成分贡献最大的鸟类物种并不总是与对质量成分贡献最大的鸟类物种相同。因此，要评估食果动物的生态作用及其作为种子传播者的有效性，需要整合涉及种子传播的各种过程（去除、沉积等）。与冠层树木相比，灌木显然具有相对较小的种子传播者，这使得它们更容易受到种子传播者灭绝的影响。
Birds directly affect seed dispersal through (1) the number of seeds they remove and (2) where and in what condition those seeds are deposited. Dispersal effectiveness is a composite of these quality and quantity components of seed dispersal. In this study, number of seeds removed and patterns of seed deposition by six bird species were determined for four shrubs in the Melastomataceae. Bird species differed in both quantity and quality components of seed dispersal. Bird species that contributed most to the quantity component of seed dispersal were not always the same as those that contributed most to the quality component. Thus, to evaluate the ecological roles of frugivores and their effectiveness as seed dispersers requires integration across various processes involved in seed dispersal (removal, deposition, etc.). In contrast to canopy trees, shrubs apparently have a relatively small set of seed dispersers, which makes them more vulnerable to the extinction of a seed disperser.