文章摘要
山东半岛南部海域渔业资源结构及关键种的年际变化
Interannual Changes of Fish Community Structure and Keystone Species in the Waters off Southern Shandong Peninsula during 2016 to 2018
投稿时间:2020-08-26  修订日期:2021-01-06
DOI:
中文关键词: 群落结构  关键种  食物网拓扑结构  网络分析法  山东半岛南部海域
英文关键词: Community structure  Keystone species  Food-web topological structure  Network analysis  the waters off Southern Shandong Peninsula
基金项目:山东省支持青岛海洋科学与技术试点国家实验室重大科技专项(No. 2018SDKJ0501-1);2. 山东省泰山学者青年专家计划;中国水产科学研究院基本科研业务费资助(2020TD01) 中国水产科学研究院黄海水产研究所基本科研业务费资助(20603022020017)
作者单位邮编
苏程程 中国水产科学研究院黄海水产研究所 266071
单秀娟 中国水产科学研究院黄海水产研究所 266071
杨涛 中国水产科学研究院黄海水产研究所 
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中文摘要:
      关键种及其与群落中其他物种的联系,对维持整个生态系统的稳定性发挥了重要作用。基于2016-2018年山东半岛南部海域渔业资源调查与渔业种类食性文献数据,构建了山东半岛南部海域食物网拓扑结构并计算了拓扑重要性指数,筛选了群落关键种并分析了其年际变化。2016-2018年山东半岛南部海域食物网包含物种20~22个,摄食关系数量59~65个,年际差异不明显;食物网拓扑结构密度范围为0.3048~0.3684,种间关联度为0.1451~0.1634;群落关键种均为鳀(Engraulis japonicus)和黄鮟鱇(Lophius litulon)。鳀作为关键被捕食者,黄鮟鱇作为关键捕食者,两者对群落结构的能量流动和信息传递起关键作用;鳀和黄鮟鱇在2016-2018年均为优势种,但鳀优势度逐年下降,细纹狮子鱼(Liparis tanakae)从2017年开始也成为优势种。
英文摘要:
      Keystone species and their relationships to other species in the community play critical roles to maintain the stability and succession of the whole ecosystem. The keystone species changed, which would cause the community structure to oscillate, and even lead to ecological dysfunction and the collapse of the entire ecosystem. Therefore, keystone species determine the structure and function of the ecosystem by food relationships. Based on the fishing log data during 2016-2018 and published references on feeding habit of fishery species in the waters off Southern Shandong Peninsula, the topological structure of food web in the waters off Southern Shandong Peninsula was established, and calculated the topological importance index, as well as selected the keystone species and analyzed their interannual changes. A total of 20~22 fish species were involved in the food web of the waters off Southern Shandong Peninsula, covered 59~65 prey-predator relationships, and these are no obvious interannual changes. The topological structure density of these food webs ranged from 0.3048 to 0.3684, and interspecies connectivity was 0.1451 to 0.1634. During 2016 to 2018, the keystone species in the fish community in the waters off Southern Shandong Peninsula were Engraulis japonicus and Lophius litulon. E. japonicus as the key prey and L. litulon as the key predator, played important roles in the energy flow and information transmission of the ecosystem. In addition, E. japonicus and L. litulon were both the dominant species during 2016-2018 in the waters off Southern Shandong Peninsula, however, the dominance of E. japonicus decreased with each passing year, and Liparis tanakae was the dominance species since 2017.
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