Consequences of intraspecific variation in seed dispersal for plant demography, communities, evolution and global change
Consequences of intraspecific variation in seed dispersal for plant demography, communities, evolution and global change
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DOI：
10.1093/aobpla/plz016
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发表时间：
2019-08-01
期刊：
影响因子：
2.9
通讯作者：
Schupp, Eugene W.
中科院分区：
文献类型：
--
作者：
Snell, Rebecca S.;Beckman, Noelle G.;Schupp, Eugene W.
种子传播作为植物迁移的唯一机会，对植物适合度、物种分布和生物多样性格局有重要影响。然而，预测灭绝风险、分布范围变化和生物多样性丧失等动态的模型往往依赖于参数的平均值，很少纳入现实的扩散机制。通过关注平均群体值，个体之间的变异或复杂的空间和时间动态引起的变异被忽略了。这就要求加大努力，了解个人的扩散变化，并更明确地将其整合到人口和社区模型涉及扩散。然而，传播的种内变异的来源，规模和结果的特点很差，限制了我们对传播在介导群落动态及其对全球变化的反应中的作用的理解。在这份手稿中，我们综合了最近的研究，探讨了扩散的个体变异的来源，并强调其对植物适应性，种群和社区的影响。我们认为，种子传播的种内变化并不简单地增加噪音的系统，但事实上，改变传播过程和模式的人口，社区，进化和响应人为变化的后果。最后，我们提出了推动这一研究领域向前发展的建议。
As the single opportunity for plants to move, seed dispersal has an important impact on plant fitness, species distributions and patterns of biodiversity. However, models that predict dynamics such as risk of extinction, range shifts and biodiversity loss tend to rely on the mean value of parameters and rarely incorporate realistic dispersal mechanisms. By focusing on the mean population value, variation among individuals or variability caused by complex spatial and temporal dynamics is ignored. This calls for increased efforts to understand individual variation in dispersal and integrate it more explicitly into population and community models involving dispersal. However, the sources, magnitude and outcomes of intraspecific variation in dispersal are poorly characterized, limiting our understanding of the role of dispersal in mediating the dynamics of communities and their response to global change. In this manuscript, we synthesize recent research that examines the sources of individual variation in dispersal and emphasize its implications for plant fitness, populations and communities. We argue that this intraspecific variation in seed dispersal does not simply add noise to systems, but, in fact, alters dispersal processes and patterns with consequences for demography, communities, evolution and response to anthropogenic changes. We conclude with recommendations for moving this field of research forward.