Testing the matching habitat choice hypothesis in nature: phenotype-environment correlation and fitness in a songbird population
Testing the matching habitat choice hypothesis in nature: phenotype-environment correlation and fitness in a songbird population
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DOI：
10.1007/s10682-015-9793-4
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发表时间：
2015-11-01
影响因子：
1.9
通讯作者：
Potti, Jaime
中科院分区：
文献类型：
--
作者：
Camacho, Carlos;Canal, David;Potti, Jaime
匹配栖息地选择假说认为，具有不同表型的个体积极选择它们最适应的栖息地，从而最大化适应性。尽管匹配栖息地选择对许多生态和进化过程有潜在的影响，但很少有研究对其预测进行测试。在这里，我们使用26年的数据集上的空间结构人口的捕蝇（Ficedula hypoleuca），以测试是否表型依赖的扩散和栖息地选择转化为增加健身，招聘成功的衡量。在我们的研究系统中，男性在身体大小范围的极端分离到落叶和针叶林通过非随机扩散。根据匹配的栖息地选择假说，健身的大型男性预计将更高的落叶栖息地，在那里他们优先解决繁殖，而相反的情况将是真实的小型男性，这是更频繁的针叶林。我们的研究结果表明，招聘成功的针叶林增加非线性与身体大小，与男性在中间的大小范围有较高的健身比大，小尺寸的男性。然而，没有明显的趋势，观察到在落叶林中，男性的大小有类似的健身。经验丢弃其他重要的过程可能混淆匹配的栖息地选择，基因型和身体状况依赖的扩散，竞争性排斥仍然是最有可能的力量塑造非随机分布的男性美洲斑蝶。因此，在自然界中匹配的栖息地选择的操作和发生的决定性的示范仍然有待完成。
The matching habitat choice hypothesis holds that individuals with different phenotypes actively select the habitats to which they are best adapted, hence maximizing fitness. Despite the potential implications of matching habitat choice for many ecological and evolutionary processes, very few studies have tested its predictions. Here, we use a 26-year dataset on a spatially structured population of pied flycatchers (Ficedula hypoleuca) to test whether phenotype-dependent dispersal and habitat selection translate into increased fitness, as measured by recruitment success. In our study system, males at the extremes of the body size range segregate into deciduous and coniferous forests through nonrandom dispersal. According to the matching habitat choice hypothesis, fitness of large-sized males is expected to be higher in the deciduous habitat, where they preferentially settle to breed, while the reverse would be true for small-sized males, which are more frequent in the coniferous forest. Our results showed that recruitment success in the coniferous forest increased non-linearly with body size, with males at the middle of the size range having higher fitness than both large and small-sized males. However, no clear trend was observed in the deciduous forest where males of either size had similar fitness. After empirically discarding other important processes potentially confounding matching habitat choice, as genotype- and body condition-dependent dispersal, competitive exclusion remains the most likely force shaping the nonrandom distribution of male pied flycatchers. A conclusive demonstration of the operation and occurrence of matching habitat choice in nature remains therefore to be done.