Drivers of contemporary lacustrine fish species richness in the glacial Lake Agassiz basin

Aim: Biological communities are the result of a stepwise spatiotemporal filtering process, driven by large-scale historical and local contemporary determinants. The biogeographical pattern and species richness of North American fishes are predominantly determined by historical processes of past glaciations and postglacial dispersal and by contemporary environmental and ecological processes. Here, we evaluate the effects of postglacial dispersal through glacial Lake Agassiz and habitat heterogeneity, as represented by lake surface area, on contemporary freshwater fish species richness patterns of northwestern Ontario lakes.
Location: Northwestern Ontario, Canada
Taxon: Freshwater fishes
Methods: We applied the theory of island biogeography and species-area curves to examine the effects of isolation from the past dispersal corridor of glacial Lake Agassiz and habitat heterogeneity on species richness across 264 contemporary lakes in northwestern Ontario, Canada. While controlling for corr..., ,

研究目标：生物群落是逐步时空过滤过程的产物，该过程受大规模历史因素与当代局地因素共同驱动。北美鱼类的生物地理格局与物种丰富度主要受末次冰期历史过程、冰后扩散过程，以及当代环境与生态过程调控。本研究聚焦加拿大安大略省西北部湖泊，评估通过阿加西斯冰原湖（glacial Lake Agassiz）的冰后扩散路径，以及以湖泊表面积为表征指标的生境异质性，对当代淡水鱼类物种丰富度格局的影响。
研究区域：加拿大安大略省西北部
研究类群：淡水鱼类
研究方法：本研究应用岛屿生物地理学理论与种-面积曲线，以加拿大安大略省西北部264个现存湖泊为研究对象，探究与阿加西斯冰原湖古扩散廊道的隔离程度，以及生境异质性对物种丰富度的影响。本研究在控制corr...（原文未完整给出）相关变量的前提下开展分析。