Geographic variation in range size and beta diversity of groundwater crustaceans: insights from habitats with low thermal seasonality
Geographic variation in range size and beta diversity of groundwater crustaceans: insights from habitats with low thermal seasonality
复制标题
地下水甲壳类动物范围大小和β多样性的地理变化：来自低热季节性栖息地的见解
DOI：
10.1111/geb.12200
复制
发表时间：
2014
影响因子：
6.4
通讯作者：
F. Malard
中科院分区：
文献类型：
--
作者：
M. Zagmajster;David Eme;C. Fišer;D. Galassi;P. Marmonier;F. Stoch;J. Cornu;F. Malard
目标
人们提出了三种广泛的机制来解释物种范围大小的地理变化：栖息地面积/异质性、气候季节性和长期气候变化。然而，事实证明很难理清它们的相对作用，特别是因为温度季节性往往与长期温度波动的幅度共变。在这里，我们对地下水栖息地的范围大小和β多样性进行了首次大陆尺度的分析，为这场争论提供了新的线索，其中类群不会受到温度季节性纬度变化的影响。
地点
欧洲。
方法
我们编制并绘制了 1570 种地下水甲壳动物物种的出现数据。广义回归模型用于测试地理范围大小的纬度变化，并评估三种主要机制在塑造当今范围大小模式中的相对作用。我们将贝塔多样性分为空间周转和嵌套成分，并分析了它们在整个欧洲的纬度变化。
结果
中位范围大小随着纬度高于 43°N 而增加，并且即使在考虑了系统发育效应之后，单个物种的范围大小也与纬度呈正相关。与降水季节性和栖息地异质性（包括含水层面积、海拔范围、气候稀有性和生产能源）相比，长期温度变化导致整个欧洲地下水甲壳类动物中位范围大小的变化要大得多。在以稳定的历史气候为特征的南部地区，空间周转对β多样性的贡献明显大于北欧。
主要结论
我们的研究结果为历史气候假说提供了支持，该假说表明古北区高纬度地区范围扩大和物种更替减少的模式主要是由长期温度波动驱动的，而不是由气候季节性和栖息地的可用性和异质性驱动的。
Aim
Three broad mechanisms have been proposed to explain geographic variation in species range size: habitat area/heterogeneity, climate seasonality and long-term climate variability. However, it has proved difficult to disentangle their relative role, particularly as temperature seasonality often covaries with the amplitude of long-term temperature oscillations. Here, we shed new light onto this debate by providing the first continental-scale analysis of range size and beta diversity in groundwater habitats, where taxa are not exposed to latitudinal variation in temperature seasonality.
Location
Europe.
Methods
We compiled and mapped occurrence data for 1570 groundwater crustacean species. Generalized regression models were used to test for latitudinal variation in geographic range size and to assess the relative role of the three broad mechanisms in shaping present-day patterns of range size. We partitioned beta diversity into its spatial turnover and nestedness components and analysed their latitudinal variation across Europe.
Results
Median range size increases with latitude above 43° N and the range size of individual species is positively correlated to latitude, even after accounting for phylogenetic effects. Long-term temperature variability accounted for a substantially higher variation in median range size of groundwater crustaceans across Europe than precipitation seasonality and habitat heterogeneity, including aquifer area, elevation range, climatic rarity and productive energy. Spatial turnover contributes significantly more to beta diversity in southern regions characterized by stable historic climates than it does in northern Europe.
Main conclusions
Our findings add support to the historic climate hypothesis which suggests that patterns of increasing range size and decreasing species turnover at higher latitudes in the Palaearctic region are primarily driven by long-term temperature oscillations rather than by climatic seasonality and the availability and heterogeneity of habitats.