【摘要】 为了探究黄河口及其邻近水域鱼类群落谱系多样性分布格局及其维持机制，本文根据2013年6月、7月、8月、10月和2014年2月、4月和5月在该海域开展的7个航次的鱼类资源调查数据，从鱼类系统发育关系角度出发，分析了该海域鱼类群落谱系α和β多样性及其与不同影响因子的关系。结果表明，该海域鱼类群落谱系α多样性指数呈现显著的月份间差异，其中谱系离散度（phylogenetic species variability, PSV）和谱系丰富度（phylogenetic species richness, PSR）在2月、4月和5月显著低于其他月份，谱系均匀度（phylogenetic species evenness, PSE）在4月和5月显著高于其他月份。表层温度和表层盐度对该海域鱼类群落谱系α多样性影响显著。采用多位点相异和成对相异方法计算得出的结果表明，该海域鱼类群落谱系β多样性在不同月份和站位间均较高，周转组分对谱系β多样性起着主导作用；表层盐度、空间距离对于谱系β多样性和周转组分影响显著。黄河口及其邻近水域鱼类群落谱系α和β多样性均呈现明显的时空变化，环境因素和空间距离是影响其变化的主要因素。更多还原

【Abstract】 In order to explore the spatial distribution patterns of the phylogenetic diversity of fish community and the maintenance mechanism in the Yellow River Estuary and its adjacent waters. The phylogenetic α and βdiversity and their relationship with different influencing factors were examined considering phylogeny of fish species based on data collected from the surveys in June, July, August and October in 2013 and February, April and May in 2014. The results showed there were significant monthly variations in the phylogenetic α diversity of fish community. The PSV and PSR were significantly lower in February, April, and May, and PSE was significantly higher in April and May. Sea surface temperature(SST) and sea surface salinity(SSS)significantly influenced the phylogenetic α diversity. Phylogenetic β diversity were relatively high across different months and different stations regardless of whether the multi-site dissimilarity or the pairwise dissimilarity calculation methods were used, the turnover component drove the changes in phylogenetic βdiversity. Sea surface salinity and spatial distance had significant impacts on phylogenetic β diversity and turnover components. The α and β diversity exhibit noticeable spatio-temporal variations, and environmental factors and spatial distance are the primary factors influencing the changes in phylogenetic diversity of fish community in the Yellow River Estuary and its adjacent waters.更多还原