The importance of landscape and habitat properties in explaining instantaneous and long‐term distributions of large branchiopods in subtropical temporary pans
The importance of landscape and habitat properties in explaining instantaneous and long‐term distributions of large branchiopods in subtropical temporary pans
复制标题
景观和栖息地特性在解释亚热带临时栖息地中大型鳃足动物的瞬时和长期分布中的重要性
DOI：
10.1111/j.1365-2427.2011.02630.x
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发表时间：
2011
影响因子：
2.7
通讯作者：
B. Vanschoenwinkel
中科院分区：
文献类型：
--
作者：
T. Nhiwatiwa;L. Brendonck;A. Waterkeyn;B. Vanschoenwinkel
总结
1.从生境斑块的空间结构出发来理解生态群落的结构和动态是亚生境生态学的出发点。 评估元群落结构的一种方法是研究环境异质性和空间结构在解释不同空间和时间尺度上的群落格局时的相对重要性。
2.利用两个群落数据集（群落快照和4年的长期数据集）研究了津巴布韦东南部亚热带临时盘区大型鳃足类群落的后趋性结构。 我们评估了环境异质性和扩散（推断从补丁占用模式）作为社区结构的驱动程序的相对重要性。此外，我们对比了metacerity模式的平底锅，偶尔连接到河流（洪泛区平底锅）和平底锅，完全缺乏这种连接（内流平底锅）使用冗余模型。
3.我们的数据集反映了物种分类和扩散限制，表明局部和区域过程有助于解释该系统中的鳃足类组合。 地方和区域因素的相对重要性取决于所考虑的数据集的类型。总体而言，栖息地的特点，随时间而变化，如电导率，水文周期和植被覆盖，最好的解释瞬时物种组成过程中观察到的快照采样，而长期的物种组成似乎与更恒定的固有的栖息地特性，如河流连通性和空间位置。
Summary
1. The notion that the spatial configuration of habitat patches has to be taken into account to understand the structure and dynamics of ecological communities is the starting point of metacommunity ecology. One way to assess metacommunity structure is to investigate the relative importance of environmental heterogeneity and spatial structure in explaining community patterns over different spatial and temporal scales.
2. We studied metacommunity structure of large branchiopod assemblages characteristic of subtropical temporary pans in SE Zimbabwe using two community data sets: a community snapshot and a long-term data set covering 4 years. We assessed the relative importance of environmental heterogeneity and dispersal (inferred from patch occupancy patterns) as drivers of community structure. Furthermore, we contrasted metacommunity patterns in pans that occasionally connect to the river (floodplain pans) and pans that lack such connections altogether (endorheic pans) using redundancy models.
3. Echoes of species sorting and dispersal limitation emerge from our data set, suggesting that both local and regional processes contribute to explaining branchiopod assemblages in this system. Relative importance of local and regional factors depended on the type of data set considered. Overall, habitat characteristics that vary in time, such as conductivity, hydroperiod and vegetation cover, best explained the instantaneous species composition observed during a snapshot sampling while long-term species composition appeared to be linked to more constant intrinsic habitat properties such as river connectivity and spatial location.