Drivers of native and non-native freshwater fish richness across North America: Disentangling the roles of environmental, historical and anthropogenic factors

Aim: A better understanding of native and non-native species response to environmental conditions, historical processes, and human pressures is crucial in the face of global environmental changes affecting biodiversity. Here, we evaluate the relative roles of environmental, historical, and anthropogenic factors in influencing species richness of native and non-native freshwater fishes in watersheds across North America. Location: North America (exclusive of Mexico)

Time period: Recent

Major taxa studied: Freshwater fishes

Methods: We compiled an extensive dataset of native and non-native fish richness in 2993 watersheds across North America, together with corresponding data for environmental (climatic, geographic), historical, and anthropogenic factors. We used variance partitioning and hierarchical partitioning to quantify the relative importance of environmental, historical and anthropogenic factors in explaining richness variation in native and non-native fishes (overall, an...

研究目的：面对影响生物多样性的全球环境变化，深入理解本土与外来物种对环境条件、历史过程及人为压力的响应机制，对于生物多样性保护至关重要。本研究针对北美洲各流域内的本土与外来淡水鱼类物种丰富度，评估环境、历史与人为因素的相对作用。
研究区域：北美洲（不含墨西哥）
研究时段：近期
研究类群：淡水鱼类
研究方法：本研究构建了涵盖北美2993个流域的本土与外来鱼类物种丰富度的大规模数据集，并配套收集了对应的环境（气候、地理）、历史及人为因素数据。我们采用方差分区（variance partitioning）与分层分区（hierarchical partitioning）方法，量化环境、历史与人为因素在解释本土及外来鱼类物种丰富度变异中的相对重要性（整体而言，……）