中国水产科学2018，Vol.25Issue(2)：229-236,8.DOI:10.3724/SP.J.1118.2018.17374
渤海鱼类群落结构关键种
Keystone species of fish community structure in the Bohai Sea
摘要
Abstract
This study applied cluster analysis and MDS sequence analysis to catch-rate data of fish species from bottom-trawl surveys in the Bohai Sea in August of 2012 to 2016. We selected keystone species of the fish com-munity in the Bohai Sea, based on the annual contributions of similar species within clusters and different species between various clusters. (1) When the similarity contribution rate ranged from 29.93% to 35.69%, the fish com-munities in the Bohai Sea were clustered into 7, 9, 6, 5 and 6 groups for 2012–2016 consecutively, with corre-sponding MDS coefficients equaling 0.16, 0.14, 0.18, 0.15, and 0.17 respectively. (2) There were significant dif-ferences (P=0.001) in the species composition of the fish community groups among the five years. The fish spe-cies were identified for each year that had cumulatively contributed to about 80% of the difference between com-munity groups and occurred in more than half of the groups. Unfortunately, no common species was identified for all five years. Engraulis japonicus was identified in four years, and Setipinna taty was identified in three years. For species which contributed to more than 10% of the between-groups difference and displayed a more than 50%of occurrence in a year,none occurred in four or five years,only Engraulis japonicas and Setipinna taty occurred in three years. (3) Similarly, the fish species were identified for each year that had cumulatively contributed to about 80% of the difference within groups and occurred in more than half of the groups. No species were common to three or more years. Three species (i.e. Engraulis japonicas, Chaeturichthys stigmatias, and Synechogobius hasta)occurred in two of the five years.For species which had contributed to more than 10%of the within-groups difference and displayed greater than 50% occurrence in a year, no species occurred in more than four years, only Engraulis japonicas occurred in three years,and Chaeturichthys stigmatias and Synechogobius hasta occurred in two years. (4) Based on the annual cumulative or single similarity or difference contribution rates of every fish species to community groups, we conclude that Engraulis japonicas is the primary keystone species in the fish community structure of the Bohai Sea, the Setipinna taty is the second one, which is then followed by Chaeturichthys stigmatias and Synechogobius hasta. This conclusion is supported by the ratio, correlation, and regression of the average catches per station of these four species to that of all the pelagic or demersal species, and the annual dominance indices of these species. Results of this study provide a scientific basis for the adjustment of the fishing industry and the maintenance of fishery resources in the Bohai Sea.关键词
渤海/鱼类/群落结构/关键种/资源评估Key words
Bohai Sea/fish/community structure/keystone species/stock assessment分类
农业科技引用本文复制引用
李忠义,吴强,单秀娟,杨涛,戴芳群,金显仕..渤海鱼类群落结构关键种[J].中国水产科学,2018,25(2):229-236,8.基金项目
国家973计划项目(2015CB453303) （2015CB453303）
青岛海洋科学与技术国家实验室鳌山科技创新计划(2015ASKJ02) （2015ASKJ02）
农业部公益性行业科研专项(2013030503) （2013030503）
农业部黄渤海渔业资源环境重点野外科学观测试验站和山东省泰山学者工程专项. （）
