黄河口及其邻近海域鱼类群落功能β多样性及其影响因素OA

To investigate the distribution patterns and maintenance mechanisms of fish community functional β-diversity in the Yellow River Estuary and its adjacent waters,we examined the functional β-diversity of fish communities,its components,and influencing factors from the perspective of fish functional traits,utilizing fish resource and environmental survey data from seven cruises conducted in June,July,August,and October 2013,as well as February,April,and May 2014.The results indicated that,for both multi-site dissimilarity and pairwise dissimilarity calculations,functional β-diversity was consistently high across different months and stations,with the highest values observed in February and May.The functional turnover component predominantly influenced the β-diversity of fish communities in this region,with the highest proportion in February and May,while showing an overall decreasing trend from June to October.In contrast,the nestedness component exhibited an opposite pattern to the turnover component,indicating significant differences in fish functional traits among different stations in the study area across all months.Multiple regression analysis based on distance matrices showed that spatial distance,environmental factors,and biological factors all had significant impacts on functional β-diversity and its turnover component,though the dominant influencing factors varied among months.Environmental factors exerted a more significant effect on functional β-diversity,and environmental filtering served as the primary factor affecting the functional β-diversity of fish communities in the Yellow River Estuary.