Ontogenetic niche shifts as a driver of seasonal migration
Ontogenetic niche shifts as a driver of seasonal migration
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DOI：
10.1007/s00442-020-04682-0
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发表时间：
2020-06-11
期刊：
影响因子：
2.7
通讯作者：
Olff, Han
中科院分区：
文献类型：
--
作者：
Fokkema, Wimke;van der Jeugd, Henk P.;Olff, Han
个体发生的生态位转移有助于理解种群动态。在这里，我们表明，个体发育生态位的变化也提供了一个解释，补充传统的概念，为什么某些物种显示季节性迁移。我们描述了人口过程（生存，繁殖和迁移）和相关的生态要求的物种可能会改变与个体发育阶段（少年，成人）和整个迁移范围（繁殖，非繁殖）。我们将这一概念应用于广泛不同的物种（黑腹布伦特鹅（布兰塔B。bernicla）、座头鲸（Megaptera novaeangliae）和洄游太平洋鲑鱼（Oncorhynchus gorbuscha），以检验这一假设的普遍性。与个体发育生态位转移是季节性迁移的重要驱动力的想法一致，我们发现，青少年生命阶段的生长和生存最受益于特定于繁殖区的生态条件。我们认为，矩阵人口建模技术是有希望的检测的重要性，个体发育生态位的变化，在维持迁移策略。作为一个概念的证明，我们应用了第一次分析居民，部分迁移和完全迁移的藤壶鹅（Branta leucopsis）的人口。我们认为，认识到移民的成本和效益，以及这些如何随着生命阶段的变化，是很重要的理解和保护全球环境变化下的移民。
Ontogenetic niche shifts have helped to understand population dynamics. Here we show that ontogenetic niche shifts also offer an explanation, complementary to traditional concepts, as to why certain species show seasonal migration. We describe how demographic processes (survival, reproduction and migration) and associated ecological requirements of species may change with ontogenetic stage (juvenile, adult) and across the migratory range (breeding, non-breeding). We apply this concept to widely different species (dark-bellied brent geese (Branta b. bernicla), humpback whales (Megaptera novaeangliae) and migratory Pacific salmon (Oncorhynchus gorbuscha) to check the generality of this hypothesis. Consistent with the idea that ontogenetic niche shifts are an important driver of seasonal migration, we find that growth and survival of juvenile life stages profit most from ecological conditions that are specific to breeding areas. We suggest that matrix population modelling techniques are promising to detect the importance of the ontogenetic niche shifts in maintaining migratory strategies. As a proof of concept, we applied a first analysis to resident, partial migratory and fully migratory populations of barnacle geese (Branta leucopsis). We argue that recognition of the costs and benefits of migration, and how these vary with life stages, is important to understand and conserve migration under global environmental change.