Summer feeding activities of zooplankton in Prydz Bay, Antarctica

	Summer feeding activities of zooplankton in Prydz Bay, Antarctica
	Li, CL; Sun, S; Zhang, GT; Ji, P
	2001-12-01
发表期刊	POLAR BIOLOGY
ISSN	0722-4060
卷号	24 期号:12 页码:892-900
文章类型	Article
摘要	Grazing of dominant zooplankton copepods (Calanoides acutus. and Metridia gerlachei), salps (Salpa thompsoni) and microzooplankton was determined during the austral summer of 1998/1999 at the seasonal ice zone of the Prydz Bay region. The objective was to measure the ingestion rates of zooplankton at the seasonal ice zone, so as to evaluate the importance of different groups of zooplankton in their grazing impact on phytoplankton standing stock and primary production. Grazing by copepods was low, and accounted for less than or equal to 1% of phytoplankton standing stocks and 3.8-12.5% of primary production for both species during this study, even the ingestion rates of individuals were at a high level compared with previous reports. S. thompsoni exhibited a relatively high grazing impact on primary production (72%) in the north of our investigation area. The highest grazing impact on phytoplankton was exerted by microzooplankton during this investigation, and accounted for 10-65% of the standing stock of phytoplankton and 34-100% of potential daily primary production. We concluded that microzooplankton was the dominant phytoplankton consumer in this study area. Salps also played an important role in control of phytoplankton where swarming occurred. The grazing of copepods had a relatively small effect on phytoplankton biomass development.; Grazing of dominant zooplankton copepods (Calanoides acutus. and Metridia gerlachei), salps (Salpa thompsoni) and microzooplankton was determined during the austral summer of 1998/1999 at the seasonal ice zone of the Prydz Bay region. The objective was to measure the ingestion rates of zooplankton at the seasonal ice zone, so as to evaluate the importance of different groups of zooplankton in their grazing impact on phytoplankton standing stock and primary production. Grazing by copepods was low, and accounted for less than or equal to 1% of phytoplankton standing stocks and 3.8-12.5% of primary production for both species during this study, even the ingestion rates of individuals were at a high level compared with previous reports. S. thompsoni exhibited a relatively high grazing impact on primary production (72%) in the north of our investigation area. The highest grazing impact on phytoplankton was exerted by microzooplankton during this investigation, and accounted for 10-65% of the standing stock of phytoplankton and 34-100% of potential daily primary production. We concluded that microzooplankton was the dominant phytoplankton consumer in this study area. Salps also played an important role in control of phytoplankton where swarming occurred. The grazing of copepods had a relatively small effect on phytoplankton biomass development.
关键词	Marginal Ice-zone Krill Euphausia-superba Gut Evacuation Rates Midwater Food Web Weddell Sea Southern-ocean Grazing Rates Ross Sea Phytoplankton Copepods
学科领域	Biodiversity Conservation ; Ecology
收录类别	SCI
语种	英语
WOS记录号	WOS:000172557500003
引用统计	被引频次：24[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/2832
专题	海洋生态与环境科学重点实验室胶州湾海洋生态系统国家野外研究站
作者单位	Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Li, CL,Sun, S,Zhang, GT,et al. Summer feeding activities of zooplankton in Prydz Bay, Antarctica[J]. POLAR BIOLOGY,2001,24(12):892-900.
APA	Li, CL,Sun, S,Zhang, GT,&Ji, P.(2001).Summer feeding activities of zooplankton in Prydz Bay, Antarctica.POLAR BIOLOGY,24(12),892-900.
MLA	Li, CL,et al."Summer feeding activities of zooplankton in Prydz Bay, Antarctica".POLAR BIOLOGY 24.12(2001):892-900.

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