Understanding the factors contributing to variation in demographic parameters and their influences on population growth is fundamental to effective conservation of small populations, but this information is often not available. Among shorebirds, population growth is generally most sensitive to changes in adult survival so understanding the factors affecting this vital rate is important. We used a long‐term mark–resight dataset and Program MARK to examine the effect of management actions, initiated to improve nesting productivity, on adult survival in a threatened population of Snowy Plovers (Charadrius nivosus) in Oregon, USA. Apparent adult survival averaged 0.71 ± 0.01 (SE), but increased from 1990 to 2014. This increase coincided with a decline in use of protective nest exclosures, but initiation of lethal nest predator management. The unexpected apparent benefit to adult survival of removal of nest predators and the negative effect of protective nest exclosures highlight the importance of understanding how management practices at one life cycle stage may have unintended consequences at other life stages. Our 25‐year analysis adds to our knowledge of an intensively managed, threatened species at the northern limit of its range, but, more importantly, knowledge of the negative effect of exclosure use and the positive effect of predator management on adult survival can help inform conservation of less well‐studied species with similar life histories.

中文翻译：

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生产力管理对白雪皑皑成年人生存的影响

了解有效影响人口参数变化的因素及其对人口增长的影响，对于有效地保护小型人口至关重要，但通常无法获得此信息。在shore鸟中，种群增长通常对成年存活率的变化最敏感，因此了解影响该生命率的因素很重要。我们使用了长期标记检验数据集和Program MARK，研究了为改善套叠生产力而发起的管理行动对受威胁的Snowy Plovers（Charadrius nivosus）种群的成活率的影响。）在美国俄勒冈州。成人的表观存活平均为0.71±0.01（SE），但从1990年到2014年有所增加。这一增加与保护性筑巢物的使用减少，但开始了致命的筑巢捕食者管理。去除巢内捕食者对成年存活的出乎意料的明显好处以及保护性巢穴排除的负面影响凸显了理解一个生命周期阶段的管理实践在其他生命阶段可能产生意想不到的后果的重要性。我们经过25年的分析，增加了我们对处于其分布范围北端的集约化管理，受威胁物种的了解，但更重要的是，了解到使用排泄物的负面影响和捕食者管理对成年存活的积极影响可以帮助了解对具有相似生活史的研究较少的物种进行保护。