Evidence of food-based competition among passerine migrants during stopover
Evidence of food-based competition among passerine migrants during stopover
复制标题
雀形目候鸟在中途停留期间以食物为基础的竞争的证据
DOI：
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发表时间：
1991
影响因子：
2.3
通讯作者：
Wang Yong
中科院分区：
文献类型：
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作者：
F. Moore;Wang Yong
在能量需求很高的时候，当地集中的迁移，脂肪耗尽的鸟类具有相似的饮食可能导致食物竞争的增加。捕食者封闭实验的结果表明，洲际雀形目移民在中途停留后，横跨墨西哥湾的迁移抑制食物丰富。此外，当有大量潜在竞争者存在时停止的移民比在低密度条件下停止的移民更慢地补充能量储备。竞争增加了食物消耗的速度，并可能降低迁移者满足其能量需求并完成成功迁移的可能性。
SummaryLocal concentrations of migrating, fat-depleted birds with similar diets can lead to increased competition for food at a time when energy demand is high. Results of a predator-exclosure experiment indicate that intercontinental passerine migrants depress food abundance during stopover following migration across the Gulf of Mexico. Moreover, migrants that stop when a high number of potential competitors are present replenish energy reserves more slowly than migrants that stop under low density conditions. Competition increase the rate of food depletion and may decrease the probability that a migrant will meet its energetic requirements and complete a successful migration.