Zhang Bo, Jin Xian-Shi, Tang Qi-Sheng
Ministry of Agriculture Key Laboratory of Stock Assessment and Ecosystem, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, Shandong, China.
Ying Yong Sheng Tai Xue Bao. 2009 Feb;20(2):344-51.
Based on the three bottom trawl surveys in adjacent waters of Changjiang estuary in June, August and October 2006, the composition and variation of the functional groups of high trophic level communities in the waters were studied. According to diet analysis, the high trophic level communities in the waters included six functional groups, i.e., piscivore, shrimp predator, crab predator, benthivore, planktivore, and generalist predator. Due to the variation of marine environment and fish migration behavior, the composition and trophic level of the high trophic level communities had greater monthly change. In June, fishes, acetes, and crabs dominated the communities, and planktivore was the major functional group, with its trophic level being the lowest (3.06); in August, fishes were dominant, and shrimp predator was the major functional group, with its trophic level being the highest (3.78); and in October, fishes also dominated the communities, the proportion of shrimp and crab increased, and planktivore and benthivore were the major functional groups, with a trophic level of 3.58.
根据2006年6月、8月和10月在长江口邻近水域进行的三次底拖网调查，研究了该水域高营养级群落功能群的组成和变化。通过食性分析，该水域高营养级群落包括六个功能群，即食鱼者、捕食虾类者、捕食蟹类者、底栖动物食性者、浮游动物食性者和广食性捕食者。由于海洋环境的变化和鱼类洄游行为，高营养级群落的组成和营养级具有较大的月变化。6月，鱼类、毛虾和蟹类在群落中占主导地位，浮游动物食性者是主要功能群，其营养级最低（3.06）；8月，鱼类占主导地位，捕食虾类者是主要功能群，其营养级最高（3.78）；10月，鱼类也在群落中占主导地位，虾类和蟹类的比例增加，浮游动物食性者和底栖动物食性者是主要功能群，营养级为3.58。
