School of Aquatic and Fishery Sciences, University of Washington, Box 355020, Seattle, WA, USA
School of Aquatic and Fishery Sciences, University of Washington, Box 355020, Seattle, WA, USA.
Proc Biol Sci. 2018 Jan 31;285(1871). doi: 10.1098/rspb.2017.2214.
Dispersal is a fundamental process defining the distribution of organisms and has long been a topic of inquiry in ecology and evolution. Emerging research points to an interdependency of dispersal with a diverse suite of traits in terrestrial organisms, however the extent to which such dispersal syndromes exist in freshwater species remains uncertain. Here, we test whether dispersal in freshwater fishes (1) is a fixed property of species, and (2) correlates with life-history, morphological, ecological and behavioural traits, using a global dataset of dispersal distances collected from the literature encompassing 116 riverine species and 196 locations. Our meta-analysis revealed a high degree of repeatability and heritability in the dispersal estimates and strong associations with traits related to life-history strategies, energy allocation to reproduction, ecological specialization and swimming skills. Together, these results demonstrate that similar to terrestrial organisms, the multi-dimensional nature of dispersal syndromes in freshwater species offer opportunities for the development of a unifying paradigm of movement ecology that transcend taxonomic and biogeographical realms. The high explanatory power of the models also suggests that trait-based and phylogenetic approaches hold considerable promises to inform conservation efforts in a rapidly changing world.
扩散是定义生物分布的基本过程，长期以来一直是生态学和进化研究的主题。新兴研究表明，扩散与陆地生物的一系列多样化特征相互依存，然而，这种扩散综合征在淡水物种中的存在程度尚不确定。在这里，我们使用从文献中收集的包括 116 种河流物种和 196 个地点的扩散距离的全球数据集，检验淡水鱼类的扩散（1）是否是物种的固定属性，以及（2）是否与生活史、形态、生态和行为特征相关。我们的荟萃分析显示，扩散估计值具有高度的可重复性和遗传性，并且与与生活史策略、生殖能量分配、生态专业化和游泳技能相关的特征密切相关。总之，这些结果表明，类似于陆地生物，淡水物种扩散综合征的多维性质为超越分类和生物地理领域的运动生态学统一范式的发展提供了机会。模型的高解释力还表明，基于特征和系统发育的方法在快速变化的世界中为保护工作提供了很大的希望。
