湖泊科学Issue(5)：911-916,6.DOI:10.18307/2015.0518
沉积物再悬浮对食浮游动物鱼类捕食浮游动物的影响∗
Effect of sediment resuspension on predation of planktivorous fish on zooplankton
摘要
Abstract
Sediment resuspension resulted from wave actions is one of the major characters of subtropical shallow lakes. Resuspen-sion can directly alter the zooplankton community structures, and indirectly influence the predation of planktivorous fishes. Our study aimed to reveal how planktivorous fish Hemiculter leucisculus affected the zooplankton community structures in different levels of sediment resuspension. The results showed that in the condition of H. leucisculus, large-sized cladoceran Daphnia obtusa was on-ly found and became dominant in the treatment of weak resuspension. Biomass of D. obtusa decreased with the increase of resus-pension intensity in treatments without H. leucisculus and Chydorus sp. . The Ceriodaphnia cornuta dominated the cladoceran com-munities in the treatments of strong resuspension without H. leucisculus or no resuspension with H. leucisculus. Regardless of fish and resuspension intensity, Mesocyclops sp. was dominant copepod and its biomass increased with the decrease of the resupension intensity. Rotifer abundances were lower than cladoceran and copepod in all treatments. This study indicates that in subtropical shallow lakes, a certain level of sediment resuspension can weaken both the predation of planktivorous fishes and resuspension effect on large-sized cladoceran, which can decrease the chlorophyll-a concentration through increasing the feeding of large-sized cladoceran on algae.关键词
沉积物再悬浮/浮游动物/餐条/群落结构/亚热带浅水湖泊/太湖Key words
Sediment resuspension/zooplankton/Hemiculter leucisculus/community structures/subtropical shallow lakes/Lake Taihu引用本文复制引用
周礼斌,陈非洲..沉积物再悬浮对食浮游动物鱼类捕食浮游动物的影响∗[J].湖泊科学,2015,(5):911-916,6.基金项目
国家自然科学基金项目(41271523)和江苏省科技支撑项目( BE2011820)联合资助 （41271523）
