Opportunities for growth and survival of aquatic organisms are spatially and temporally variable as habitat conditions across watersheds respond to interacting climatic, geomorphic, and hydrologic conditions. As conservation efforts often focus on identifying and protecting critical habitats, it is important to understand how this spatial and temporal variation in habitat quality affects the production dynamics of populations. Here, we use microchemical records preserved in otoliths to reconstruct juvenile habitat‐use by sockeye salmon that survived to spawn in a single population on the Alaska Peninsula. Successful individuals demonstrated a diverse array of juvenile behavioral strategies both within and among years. Importantly, the dominant juvenile behavioral strategy used by successful individuals changed among years, suggesting shifts in the relative benefits of different rearing habitats. The growth benefits of remaining in a more productive rearing lake were greatest in warm years indicating environmental influence on relative habitat quality. However, we found no strong relationship between the amount of growth accumulated in the productive rearing lake and overall population productivity across years. These results highlight the dynamic nature of habitat conditions and the beneficial effect of maintaining connectivity between diverse habitats for population productivity. When short‐term studies are used to demonstrate the relative values of different habitats to species of conservation concern, there is a distinct risk of under‐valuing habitats that may be critically important under alternative environmental conditions. In particular, land‐use decisions that reduce the range of habitat options available to species may erode a population’s ability to withstand environmental change over the long term.

中文翻译：

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分流特征与气候强迫之间的相互作用影响幼鲑的栖息地获利能力

随着跨流域的生境条件对相互作用的气候，地貌和水文条件的响应，水生生物生长和生存的机会在空间和时间上是可变的。由于保护工作通常侧重于确定和保护重要的栖息地，因此了解栖息地质量的这种时空变化如何影响种群的生产动态非常重要。在这里，我们使用保存在耳石中的微化学记录来重建红鲑鱼的幼体栖息地，这些红鲑鱼在阿拉斯加半岛的一个种群中幸存并产卵。成功的个体在几年内和几年间都表现出各种各样的青少年行为策略。重要的是，成功人士使用的主要青少年行为策略在几年间发生了变化，提示不同饲养生境的相对利益发生了变化。在温暖的年份，留在生产力更高的饲养湖中所带来的增长收益最大，表明环境对相对栖息地质量产生影响。但是，我们发现多年以来在生产性饲养湖中积累的增长量与总体人口生产率之间没有密切关系。这些结果凸显了栖息地条件的动态性质，以及维持不同栖息地之间的连通性对人口生产力的有益影响。当使用短期研究来证明不同生境对保护物种的相对价值时，存在生计价值低估的明显风险，这在替代环境条件下可能至关重要。尤其是，