Winter food provisioning reduces future breeding performance in a wild bird.
Winter food provisioning reduces future breeding performance in a wild bird.
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冬季食品供应可降低野生鸟的未来繁殖表现。
DOI：
10.1038/srep02002
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发表时间：
2013
影响因子：
4.6
通讯作者：
Blount JD
中科院分区：
文献类型：
--
作者：
Plummer KE;Bearhop S;Leech DI;Chamberlain DE;Blount JD
为野生鸟类补充食物在世界范围内发生了巨大的规模，并且经常被引用为有益的人类与野生动物相互作用的典范。最近有人推测，冬季喂养可能对未来的繁殖产生负面影响，例如使低质量的个体能够进入繁殖种群。然而，缺乏证据表明冬季取食对繁殖成功有有害影响。在对蓝山雀（Cyanistes caeruleus）多年的景观尺度研究中，我们发现冬季食物补充会降低第二年春天的繁殖性能。与未喂食的鸟类相比，冬季喂食的鸟类产下的后代体重更轻，体型更小，存活率也更低。这种损害在只接受脂肪或与维生素E结合的父母中观察到，这表明补充喂养影响生殖的机制具有一定的普遍性。我们的研究结果强调了冬季食物补充对野生鸟类种群有害的潜在后果。
Supplementation of food to wild birds occurs on an enormous scale worldwide, and is often cited as an exemplar of beneficial human-wildlife interaction. Recently it has been speculated that winter feeding could have negative consequences for future reproduction, for example by enabling low quality individuals to recruit into breeding populations. However, evidence that winter feeding has deleterious impacts on reproductive success is lacking. Here, in a landscape-scale study of blue tits (Cyanistes caeruleus) across multiple years, we show that winter food supplementation reduced breeding performance the following spring. Compared to unfed populations, winter-fed birds produced offspring that weighed less, were smaller, and had lower survival. This impairment was observed in parents that had received fat only, or in combination with vitamin E, suggesting some generality in the mechanism by which supplementary feeding affected reproduction. Our results highlight the potential for deleterious population-level consequences of winter food supplementation on wild birds.