4.7 Article

Genetic and phenotypic variation exhibit both predictable and stochastic patterns across an intertidal fish metapopulation

期刊

MOLECULAR ECOLOGY
卷 30, 期 18, 页码 4392-4414

出版社

WILEY
DOI: 10.1111/mec.15829

关键词

chaotic genetic patchiness; complex life cycles; geometric morphometrics; marine organisms; population genomics; spatiotemporal variation

资金

  1. Harman Slade Foundation
  2. Ecological Society of Australia
  3. Goodman Foundation

向作者/读者索取更多资源

The interaction of selection, gene flow, and drift influences the trajectory of adaptive evolution, with variability in these processes impacting the predictability of microevolutionary outcomes. A study on an intertidal fish species revealed the complex dynamics of genetic and phenotypic variation affected by space, time, and life stage, highlighting both predictable and stochastic patterns in marine systems when considering multiple ecological dimensions. Such findings may be applicable to species with short, complex life cycles, high dispersal potential, and living in heterogeneous environments.
Interactions among selection, gene flow, and drift affect the trajectory of adaptive evolution. In natural populations, the direction and magnitude of these processes can be variable across different spatial, temporal, or ontogenetic scales. Consequently, variability in evolutionary processes affects the predictability or stochasticity of microevolutionary outcomes. We studied an intertidal fish, Bathygobius cocosensis (Bleeker, 1854), to understand how space, time, and life stage structure genetic and phenotypic variation in a species with potentially extensive dispersal and a complex life cycle (larval dispersal preceding benthic recruitment). We sampled juvenile and adult life stages, at three sites, over three years. Genome-wide SNPs uncovered a pattern of chaotic genetic patchiness, that is, weak-but-significant patchy spatial genetic structure that was variable through time and between life stages. Outlier locus analyses suggested that targets of spatially divergent selection were mostly temporally variable, though a significant number of spatial outlier loci were shared between life stages. Head shape, a putatively ecologically responsive (adaptive) phenotype in B. cocosensis also exhibited high temporal variability within sites. However, consistent spatial relationships between sites indicated that environmental similarities among sites may generate predictable phenotype distributions across space. Our study highlights the complex microevolutionary dynamics of marine systems, where consideration of multiple ecological dimensions can reveal both predictable and stochastic patterns in the distributions of genetic and phenotypic variation. Such considerations probably apply to species that possess short, complex life cycles, have large dispersal potential and fecundities, and that inhabit heterogeneous environments.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据