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

来源：Acta Oceanologica Sinica, 2017, 36(10): 97-105.

DOI：10.1007/s13131-017-0970-x

• phytoplankton
• picoplankton
• protist
• microbial food web
• Chlamys farreri

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 20.46 mu g/L, with an average value of 2.13 mu g/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 mu g/(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.

• 出版日期2017-10
• 单位中国水产科学研究院; 中国科学院海洋研究所