Genetic and Ecogeographic Controls on Species Cohesion in Australia’s Most Diverse Lizard Radiation
Genetic and Ecogeographic Controls on Species Cohesion in Australia’s Most Diverse Lizard Radiation
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澳大利亚最多样化的蜥蜴辐射中物种凝聚力的遗传和生态地理控制
DOI：
10.1086/717411
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Rabosky, Daniel L.
中科院分区：
文献类型：
--
作者：
Prates, Ivan;Singhal, Sonal;Marchán-Rivadeneira, M. Raquel;Grundler, Maggie R.;Moritz, Craig;Donnellan, Stephen C.;Rabosky, Daniel L.
物种在地理范围大小和气候生态位宽度上差异很大。如果范围限制主要由气候因素决定，那么具有广泛气候耐受性的物种和那些跟踪地理分布广泛的气候的物种应该具有较大的范围。然而，大的范围可能会增加种群破碎化和适应性分化的可能性，潜在的解耦气候生态位宽度和范围的大小。相反，大范围物种的生态普遍性可能会导致更高的基因流跨越气候转变，增加物种的凝聚力，从而减少遗传距离隔离（IBD）。专注于澳大利亚的iconicCtenotuslizard辐射，我们问是否物种范围大小尺度与气候生态位宽度和人口隔离的程度。为此，我们根据来自75个分类群的722个个体的全基因组基因座来推断独立演变的操作分类单位（OTU）、其地理和气候范围以及OTU内IBD的强度。大范围OTU很常见，比小范围OTU具有更广泛的气候生态位;因此，大范围似乎不仅仅是被动跟踪广泛气候带的结果。具有更大范围和更广泛的气候生态位的OTU显示出相对较弱的IBD，这表明大范围的物种可能具有内在的属性，这些属性有助于跨越大距离和不同气候的遗传凝聚力。通过影响种群分化和持久性，影响物种凝聚力的性状可能在多样化和物种丰富度的大规模模式中发挥核心作用。
Species vary extensively in geographic range size and climatic niche breadth. If range limits are primarily determined by climatic factors, species with broad climatic tolerances and those that track geographically widespread climates should have large ranges. However, large ranges might increase the probability of population fragmentation and adaptive divergence, potentially decoupling climatic niche breadth and range size. Conversely, ecological generalism in large-ranged species might lead to higher gene flow across climatic transitions, increasing species’ cohesion and thus decreasing genetic isolation by distance (IBD). Focusing on Australia’s iconicCtenotuslizard radiation, we ask whether species range size scales with climatic niche breadth and the degree of population isolation. To this end, we infer independently evolving operational taxonomic units (OTUs), their geographic and climatic ranges, and the strength of IBD within OTUs based on genome-wide loci from 722 individuals spanning 75 taxa. Large-ranged OTUs were common and had broader climatic niches than small-ranged OTUs; thus, large ranges do not appear to simply result from passive tracking of widespread climatic zones. OTUs with larger ranges and broader climatic niches showed relatively weaker IBD, suggesting that large-ranged species might possess intrinsic attributes that facilitate genetic cohesion across large distances and varied climates. By influencing population divergence and persistence, traits that affect species cohesion may play a central role in large-scale patterns of diversification and species richness.
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DOI：
10.1101/085134
发表时间：
2016
期刊：
bioRxiv
影响因子：
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作者：
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影响因子：
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作者：
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