Environmentally Associated Variation in Dispersal Distance Affects Inbreeding Risk in a Stream Salamander
Environmentally Associated Variation in Dispersal Distance Affects Inbreeding Risk in a Stream Salamander
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与环境相关的扩散距离变化会影响溪蝾螈的近交风险
DOI：
10.1086/721763
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Lowe, Winsor H.
中科院分区：
文献类型：
--
作者：
Addis, Brett R.;Lowe, Winsor H.
避免近亲繁殖被认为是扩散进化的关键驱动因素，而扩散距离对于调节近亲繁殖风险尤其重要，因为与亲属交配的可能性随着扩散距离的增加而降低。然而，缺乏有关扩散距离的直接数据限制了对该预测的实证检验，特别是在可能影响扩散的多种选择力的背景下。利用源头溪流蝾螈Gyrinophilus porphyriticus，我们测试了环境条件的空间变化是否会导致扩散距离的差异，从而导致扩散对近亲繁殖风险的影响发生空间变化。利用来自五个河流的捕获-再捕获和种群基因组数据，我们发现下游河段的扩散距离大于上游河段。在下游河段，分散者的近亲繁殖风险低于非分散者，但在上游则不然。此外，河流河段的个体相关性的空间模式没有差异，这表明近亲繁殖风险的变化实际上是由于分散距离的差异造成的。这些结果表明，与环境相关的扩散距离变化可能导致扩散的近亲繁殖后果在精细的空间尺度上发生变化。他们还表明，除了避免近交之外，选择压力也维持了扩散的表型变异，这强调了在扩散研究中解决替代假设的重要性。
Avoiding inbreeding is considered a key driver of dispersal evolution, and dispersal distances should be especially important in mediating inbreeding risk because the likelihood of mating with relatives decreases with dispersal distance. However, a lack of direct data on dispersal distances has limited empirical tests of this prediction, particularly in the context of the multiple selective forces that can influence dispersal. Using the headwater stream salamanderGyrinophilus porphyriticus, we tested whether spatial variation in environmental conditions leads to differences in dispersal distances, resulting in spatial variation in the effect of dispersal on inbreeding risk. Using capture-recapture and population genomic data from five streams, we found that dispersal distances were greater in downstream reaches than upstream reaches. Inbreeding risk trended lower for dispersers than nondispersers in downstream reaches but not in upstream reaches. Furthermore, stream reaches did not differ in spatial patterns of individual relatedness, indicating that variation in inbreeding risk was in fact due to differences in dispersal distances. These results demonstrate that environmentally associated variation in dispersal distances can cause the inbreeding consequences of dispersal to vary at fine spatial scales. They also show that selective pressures other than inbreeding avoidance maintain phenotypic variation in dispersal, underscoring the importance of addressing alternative hypotheses in dispersal research.
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影响因子：
13.6
作者：
Haddad NM;Brudvig LA;Clobert J;Davies KF;Gonzalez A;Holt RD;Lovejoy TE;Sexton JO;Austin MP;Collins CD;Cook WM;Damschen EI;Ewers RM;Foster BL;Jenkins CN;King AJ;Laurance WF;Levey DJ;Margules CR;Melbourne BA;Nicholls AO;Orrock JL;Song DX;Townshend JR
通讯作者：
Townshend JR
有限扩散蝾螈的杂合性-行为和杂合性-适应度相关性
影响因子：
1.7
作者：
E. Liebgold;C. F. Kramer;Tamar C. Roomian;Gina M. Dolezar;P. Cabe
通讯作者：
P. Cabe
灵长类动物不存在性别偏见，具有不寻常的社会制度——合作性一妻多夫制
影响因子：
2.7
作者：
Samuel L. Díaz;Ângela M. Ribeiro
通讯作者：
Ângela M. Ribeiro
南阿巴拉契亚流域中嗜回蝾螈和拟蝾螈的生态分布
DOI：
--
发表时间：
2003
期刊：
影响因子：
--
作者：
R. Bruce
通讯作者：
R. Bruce
影响因子：
2.7
作者：
Greene, Brian T.;Lowe, Winsor H.;Likens, Gene E.
通讯作者：
Likens, Gene E.