Landscape effects on nest site selection and nest success of Northern Lapwing Vanellus vanellus in lowland wet grasslands
Landscape effects on nest site selection and nest success of Northern Lapwing Vanellus vanellus in lowland wet grasslands
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DOI：
10.1080/00063657.2016.1262816
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发表时间：
2017-02-24
期刊：
影响因子：
0.7
通讯作者：
Smart, Jennifer
中科院分区：
文献类型：
--
作者：
Bertholdt, Nikolas P.;Gill, Jennifer A.;Smart, Jennifer
胶囊：北方麦鸡避免在小的林地斑块附近筑巢，但巢捕食率并不随到林地斑块的距离而变化，这可能是因为它们避开了危险区域，也可能是因为它们认为巢捕食风险并不反映实际风险。我们量化了林地斑块的分布和结果的麦鸡巢在四个潮湿的草地sites映射巢分布和监测巢outcomes.Results：麦鸡巢显着进一步从树林比预期的机会。无论是巢捕食率，也没有发生在夜间（因此主要是哺乳动物的捕食者）或白天（主要是鸟类的捕食者）捕食的概率变化与距离林地patchs.Conclusions：高水平的巢和小鸡捕食在潮湿的草地景观限制繁殖涉禽种群的自我维持的能力。因此，确定可管理的景观功能，影响捕食率是保护研究的一个重要焦点。麦鸡避免靠近林地繁殖，但由于巢捕食率不随距离林地斑块而变化，它们的去除可能会增加合适的筑巢栖息地面积，但不太可能对生产力产生实质性影响。
Capsule: Northern Lapwing Vanellus vanellus avoid nesting close to small woodland patches but nest predation rates do not vary with distance to woodland patches, either because risky areas are avoided or perceived nest predation risk does not reflect actual risk.Aims: To explore the effects of woodland patches in wet grassland landscapes on nest distribution and success of Lapwings.Methods: We quantified the effect of woodland patches on the distribution and outcome of Lapwing nests across four wet grassland sites by mapping nest distribution and monitoring nest outcomes.Results: Lapwing nested significantly further from woods than expected by chance. Neither nest predation rates nor the probability of predation occurring at night (thus primarily mammalian predators) or day (primarily avian predators) varied in relation to distance from woodland patches.Conclusions: High levels of nest and chick predation in wet grassland landscapes limit the capacity for breeding wader populations to be self-sustaining. Consequently, identifying manageable landscape features that influence predation rates is an important focus of conservation research. Lapwing avoid breeding close to woodland but, as nest predation rates do not vary with distance from woodland patches, their removal may increase the area of suitable nesting habitat but is unlikely to substantially influence productivity.