Seasonal strategies differ between tropical and extratropical herbivores
Seasonal strategies differ between tropical and extratropical herbivores
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热带和温带食草动物的季节性策略不同
DOI：
10.1111/1365-2656.13651
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发表时间：
2022
影响因子：
4.8
通讯作者：
Staver, A. Carla
中科院分区：
文献类型：
--
作者：
Abraham, Joel O.;Hempson, Gareth P.;Faith, J. Tyler;Staver, A. Carla
季节性的食物转移和迁移是大型食草动物种群动态的重要组成部分，但我们对这些行为在宏观生态尺度上的分布缺乏系统的了解。季节性策略的流行可能与食草动物的体型和摄食行会有关，也可能受到环境特性的影响，例如土壤养分的可用性和气候的季节性。我们评估了大型哺乳动物食草动物季节性饮食变化和迁移的分布，并确定了这些行为与饮食的关系，我们发现，草食动物的策略始终与他们的特点：季节性饮食变化是最普遍的混合喂养草食动物和放牧和较大的草食动物之间的迁移。季节性也发挥了作用，特别是在高纬度地区更为常见的移徙方面。这两个饮食变化和迁移是更普遍的extratroarthritis食草动物，这也表现出更多的中间饮食和身体sizes.Our研究结果表明，强烈的季节性extratroarthritis系统的食草动物施加压力，需要广泛的行为反应，以导航季节性资源瓶颈。由此可见，热带和热带外食草动物可能有不同的全球变化的反应，与热带系统中食草动物的压力减少相比，在热带外系统中食草动物的压力增强。
Seasonal diet shifts and migration are key components of large herbivore population dynamics, but we lack a systematic understanding of how these behaviours are distributed on a macroecological scale.The prevalence of seasonal strategies is likely related to herbivore body size and feeding guild, and may also be influenced by properties of the environment, such as soil nutrient availability and climate seasonality.We evaluated the distribution of seasonal dietary shifts and migration across large‐bodied mammalian herbivores and determined how these behaviours related to diet, body size and environment.We found that herbivore strategies were consistently correlated with their traits: seasonal diet shifts were most prevalent among mixed feeding herbivores and migration among grazers and larger herbivores. Seasonality also played a role, particularly for migration, which was more common at higher latitudes. Both dietary shifts and migration were more widespread among extratropical herbivores, which also exhibited more intermediate diets and body sizes.Our findings suggest that strong seasonality in extratropical systems imposes pressure on herbivores, necessitating widespread behavioural responses to navigate seasonal resource bottlenecks. It follows that tropical and extratropical herbivores may have divergent responses to global change, with intensifying herbivore pressure in extratropical systems contrasting with diminishing herbivore pressure in tropical systems.