Dimensionality of community structure: phylogenetic, morphological and functional perspectives along biodiversity and environmental gradients
Dimensionality of community structure: phylogenetic, morphological and functional perspectives along biodiversity and environmental gradients
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群落结构的维度：生物多样性和环境梯度的系统发育、形态和功能视角
DOI：
10.1111/ecog.00847
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发表时间：
2015
期刊：
影响因子：
5.9
通讯作者：
M. M. Gavilánez
中科院分区：
文献类型：
--
作者：
R. Stevens;M. M. Gavilánez
生物多样性是一个复杂和多层面的概念，是地球上生命多样性的特征。尽管如此，大多数研究都只研究了少数几个，如果不是一个，孤立的维度。在这里，我们进行分析，明确纳入生物多样性的多个维度之间的相关性，通过表征形态，系统发育和功能结构的蝙蝠群落从南美洲大西洋森林和检查这些描述符之间的冗余度。其次，我们研究的维度（即正交维度的数量）的社区结构，通过定量确定这些不同的描述符集对应于唯一的维度。我们评估，如果从经验社区测量的维度不同，从区域物种池随机组装的社区的基础上。最后，我们研究了不同的群落结构指数是否对跨越大西洋森林的环境梯度有不同的反应。我们发现，大西洋森林蝙蝠社区是高度可变的形态，系统发育和功能结构。不同的群落结构指数表现出实质性的相关性。因此，维度低于六个不同描述符的集合，甚至低于所表示的三个不同生物维度。尽管如此，观察到的维度大于预期的零模型的组装。只有丰度为基础的指数的系统发育结构表现出显着的环境梯度。温度的季节性是最强的预测系统发育结构，过度分散的社区特征更季节性的环境和underdispersed社区发生在温度变化较小的地区。群落结构的多样性较低，系统发育结构表现出最强的模式，可能是因为系统发育反映了许多不同的生态方面的表型，不限于一个指数的结构。温度季节性是大西洋森林蝙蝠群落系统发育结构的重要决定因素。这项研究有助于我们更好地了解生物多样性分布的潜在因素，这对大西洋森林等濒危生态区越来越重要。
Biodiversity is a complex and multidimensional concept that characterizes variation of life on Earth. Nonetheless, most studies have examined only a few, if not just one, dimension in isolation. Herein we conduct analyses that explicitly incorporate correlations among multiple dimensions of biodiversity by characterizing morphological, phylogenetic, and functional structure of bat communities from Atlantic Forest of South America and examine degree of redundancy among these sets of descriptors. Second, we examine dimensionality (i.e. number of orthogonal dimensions) of community structure by quantitatively determining if these different sets of descriptors correspond to unique dimensions. We assess if dimensionality measured from empirical communities differs from that based on communities randomly assembled from a regional species pool. Finally, we examine whether different indices of community structure respond differently to environmental gradients spanning Atlantic Forest. We find that Atlantic Forest bat communities are highly variable in terms of morphological, phylogenetic, and functional structure. Different sets of community structure indices exhibited substantive correlations. Accordingly, dimensionality was lower than the set of six different descriptors or even the three different biological dimensions represented. Nonetheless, observed dimensionality was greater than that expected from a null model of assembly. Only abundance-based indices of phylogenetic structure exhibited significant environmental gradients. Temperature seasonality was the strongest predictor of phylogenetic structure, with overdispersed communities characterizing more seasonal environments and underdispersed communities occurring in areas of lower variation in temperature. Dimensionality of community structure is low with phylogenetic structure exhibiting the strongest patterns, probably because phylogeny reflects many different ecological aspects of the phenotype that are not restricted to just one index of structure. Temperature seasonality is an important determinant of phylogenetic structure of bat communities in Atlantic Forest. This research helps us to better understand the factors underlying the distribution of biodiversity, which is increasingly important for endangered ecoregions such as Atlantic Forest.