Peregrine Falcons Enable Two Species of Colonial Seabirds to Breed Successfully by Excluding Other Aerial Predators
Peregrine Falcons Enable Two Species of Colonial Seabirds to Breed Successfully by Excluding Other Aerial Predators
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DOI：
10.1675/063.034.0110
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发表时间：
2011-03-01
期刊：
影响因子：
0.3
通讯作者：
Darvill, Rachel
中科院分区：
文献类型：
--
作者：
Hipfner, J. Mark;Morrison, Kyle W.;Darvill, Rachel
普通海雀的繁殖成功（Uria aalge）和远洋鸬鹚（Phalocrocorax pelagicus）在三角岛，不列颠哥伦比亚省，加拿大，是高从2003年至2006年;四年来一对游隼（游隼）在附近筑巢然而，在三年的时间里，（2007至2009年），白头海雕（Haliaeetus leucocephalus）捕食殖民地上的成年海鼠，并在海雕冲洗孵化的海鼠后，将海鼠卵捕食给灰翅鸥（Larus glaucescens）。因此，在2007年，这两个物种的繁殖成功率都很低，然后在2008年和2009年没有成功繁殖的Murres，也没有鸬鹚筑巢。一对猎鹰保护了成千上万的海鸟，这一点值得注意，因为它对当地的保护具有重要意义。自下而上的控制海鸟繁殖的成功已经有很好的记录，但似乎需要更好地了解的作用，自上而下的机制，作为一个结果的直接（消耗）和间接（非消耗）的影响，顶级捕食者。接收日期：2010年3月13日，接受日期：2010年8月26日。
The breeding success of Common Murres (Uria aalge) and Pelagic Cormorants (Phalocrocorax pelagicus) at Triangle Island, off British Columbia, Canada, was high from 2003 to 2006; four years in which a pair of Peregrine Falcons (Falco peregrinus) nested in the vicinity However, in three years when the falcon eyrie was inactive (2007 to 2009), adult murres were depredated on the colony by Bald Eagles (Haliaeetus leucocephalus) and murre eggs were taken by Glaucous-winged Gulls (Larus glaucescens) after eagles flushed incubating murres. Consequently, breeding success in both species was low in 2007, then in 2008 and 2009 no murres bred successfully and no cormorants built nests. That a single pair of falcons protected thousands of seabirds is noteworthy for its local conservation implications. Bottom-up control of seabird breeding success has been well documented, but there appears need for a better understanding of the role of top-down mechanisms as a result of both the direct (consumptive) and indirect (non-consumptive) effects of top predators. Received 13 March 2010, accepted 26 August 2010.