Size fraction of phytoplankton and the contribution of natural plankton to the carbon source of Zhikong scallop Chlamys farreri in mariculture ecosystem of the Sanggou Bay  

作　　者：JIANG Zengjie DU Meirong FANG Jinghui GAO Yaping LI Jiaqi ZHAO Li FANG Jianguang 

机构地区：[1]Key Laboratory of Sustainable Development of Marine Fisheries of Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences [2]Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology [3]Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences

出　　处：《Acta Oceanologica Sinica》2017年第10期97-105,共9页海洋学报（英文版）

基　　金：The National Natural Science Foundation of China under contract Nos 41676147 and 41306117;the Scientific and Technological Innovation Project Financially Supported by Qingdao National Laboratory for Marine Science and Technology under contract No.2016ASKJ02;the earmarked fund for Modern Agro-industry Technology Research System under contract No.CARS-48;the National Basic Research Program of China under contract No.2011CB409805

摘　　要：The biomass and size fraction of phytoplankton in terms of chlorophyll a（Chl a） was measured during four cruises conducted in April, July, October 2013 and January 2014 in mariculture area, the Sanggou Bay, China.Results show that total Chl a levels in the surface seawater of the Sanggou Bay generally range from 0.10 to 20.46μg/L, with an average value of 2.13 μg/L. Nano-phytoplankton was the most important size-fraction and accounted for about 65.1% of total Chl a. In order to evaluate the importance of the ＂protozoan trophic link＂ for energy transfer from the microbial loop to filter-feeding feeders, Zhikong scallop Chlamys farreri was then offered a natural planktonic community as potential prey. Results show that scallops obtained carbon source from natural plankton with the rate of 11 033.05 μg/（g·d）. Protists（nanoflagellates and ciliates） were the dominant source of carbon retained by scallop（48.78%）. The microbial loop provided 58.45% of the carbon source for farmed scallops. These results indicate that the microbial loop represent a valuable trophic resource in mariculture system of the Sanggou Bay.The biomass and size fraction of phytoplankton in terms of chlorophyll a（Chl a） was measured during four cruises conducted in April, July, October 2013 and January 2014 in mariculture area, the Sanggou Bay, China.Results show that total Chl a levels in the surface seawater of the Sanggou Bay generally range from 0.10 to 20.46μg/L, with an average value of 2.13 μg/L. Nano-phytoplankton was the most important size-fraction and accounted for about 65.1% of total Chl a. In order to evaluate the importance of the ＂protozoan trophic link＂ for energy transfer from the microbial loop to filter-feeding feeders, Zhikong scallop Chlamys farreri was then offered a natural planktonic community as potential prey. Results show that scallops obtained carbon source from natural plankton with the rate of 11 033.05 μg/（g·d）. Protists（nanoflagellates and ciliates） were the dominant source of carbon retained by scallop（48.78%）. The microbial loop provided 58.45% of the carbon source for farmed scallops. These results indicate that the microbial loop represent a valuable trophic resource in mariculture system of the Sanggou Bay.

关 键 词：phytoplankton picoplankton protist microbial food web Chlamys farreri 

分 类 号：S931[农业科学—渔业资源]