Season-specific and guild-specific effects of anthropogenic landscape modification on metacommunity structure of tropical bats

1. Fragmentation per se due to human land conversion is a landscape-scale phenomenon. Accordingly, assessment of distributional patterns across a suite of potentially connected communities (i.e. metacommunity structure) is an appropriate approach for understanding the effects of landscape modification, and complements the plethora of fragmentation studies that have focused on local community structure. To date, metacommunity structure within human-modified landscapes has been assessed with regard to nestedness along species richness gradients. This is problematic because there is little support that species richness gradients are associated with the factors moulding species distributions. More importantly, many alternative patterns are possible, and different patterns may manifest during different seasons and for different guilds because of variation in resource availability and resource requirements of taxa. 2. We determined the best-fit metacommunity structure of a phyllostomid bat as...

1. 由人类土地转化直接引发的生境破碎化本身即为景观尺度的现象。据此，针对一系列潜在连通群落的分布格局进行评估（即集合群落（metacommunity）结构），是解析景观改造效应的合理路径，亦可弥补大量聚焦于本地群落结构的破碎化研究的短板。迄今为止，针对人类改造景观内的集合群落结构的相关评估，多围绕物种丰富度梯度上的嵌套性（nestedness）展开。但该研究范式存在缺陷：目前鲜有实证支持物种丰富度梯度与塑造物种分布的关键因子存在关联。更为重要的是，还存在多种其他潜在格局；由于不同类群（taxa）的资源可获得性与资源需求存在差异，不同格局可能在不同季节、针对不同功能群（guild）显现。
2. 本研究明确了叶口蝠科（phyllostomid）蝙蝠的最优拟合集合群落结构，具体如下……