Grazing impact of copepods on phytoplankton in the Bohai Sea

doi:10.1016/S0272-7714(03)00129-X

	Grazing impact of copepods on phytoplankton in the Bohai Sea
	Li, CL; Wang, R; Sun, S
	2003-11-01
发表期刊	ESTUARINE COASTAL AND SHELF SCIENCE
ISSN	0272-7714
卷号	58 期号:3 页码:487-498
文章类型	Article
摘要	During spring (April/May 1999) and autumn (September/October 1998) cruises in the Bohai Sea, China, copepods were the dominant components of mesozooplankton, the most abundant species being Calanus sinicus, Centropages mcmurrichi, Paracalanus parvus, Acartia bifilosa and Oithona similis. Pigment ingestion rates by three size classes of copepods (200-500, 500-1000 and > 1000 mum) were measured. In the south of the investigation area, gut pigment content (GPC), individual pigment-specific ingestion rates and grazing impacts on phytoplankton were lower in spring than in autumn. In the central area, GPC and individual pigment-specific ingestion rates were higher in spring than in autumn. The grazing impact on phytoplankton by the copepod assemblages was lower in spring than in autumn, however, because of the relatively smaller biomass in spring. In the western area where the Bohai Sea joins the Yellow Sea, GPC, individual pigment-specific ingestion rates and grazing impacts on phytoplankton were higher in spring than in autumn.; During spring (April/May 1999) and autumn (September/October 1998) cruises in the Bohai Sea, China, copepods were the dominant components of mesozooplankton, the most abundant species being Calanus sinicus, Centropages mcmurrichi, Paracalanus parvus, Acartia bifilosa and Oithona similis. Pigment ingestion rates by three size classes of copepods (200-500, 500-1000 and > 1000 mum) were measured. In the south of the investigation area, gut pigment content (GPC), individual pigment-specific ingestion rates and grazing impacts on phytoplankton were lower in spring than in autumn. In the central area, GPC and individual pigment-specific ingestion rates were higher in spring than in autumn. The grazing impact on phytoplankton by the copepod assemblages was lower in spring than in autumn, however, because of the relatively smaller biomass in spring. In the western area where the Bohai Sea joins the Yellow Sea, GPC, individual pigment-specific ingestion rates and grazing impacts on phytoplankton were higher in spring than in autumn. Among the three size groups, the small-sized animals (200-500 mum) contributed more than 50% (range 38-98%) of the total copepod grazing during both cruises. The grazing impact on phytoplankton by copepods was equivalent to 11.9% (range 3.0-37.1%) of the chlorophyll-a standing stock and 53.3% (range 21.4-91.4%) of the primary production during the spring cruise. Grazing impact was equivalent to 6.3% (range 2.0-11.6%) of the chlorophyll-a standing stock and >100% (range 25.7-141.6%) of the primary production during the autumn cruise. The copepod community apparently consumed only a modest proportion of the standing stock of phytoplankton during spring and autumn blooms. They did, however, sometimes graze a significant proportion of daily primary production and hence were presumably able to limit the rate of further accumulation of phytoplankton, or even to prevent it. (C) 2003 Elsevier Ltd. All rights reserved.
关键词	Copepod Feeding Bohai Sea
学科领域	Marine & Freshwater Biology ; Oceanography
DOI	10.1016/S0272-7714(03)00129-X
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000186857200008
引用统计	被引频次：18[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/337002/2782
专题	海洋生态与环境科学重点实验室
作者单位	Acad Sinica, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Li, CL,Wang, R,Sun, S. Grazing impact of copepods on phytoplankton in the Bohai Sea[J]. ESTUARINE COASTAL AND SHELF SCIENCE,2003,58(3):487-498.
APA	Li, CL,Wang, R,&Sun, S.(2003).Grazing impact of copepods on phytoplankton in the Bohai Sea.ESTUARINE COASTAL AND SHELF SCIENCE,58(3),487-498.
MLA	Li, CL,et al."Grazing impact of copepods on phytoplankton in the Bohai Sea".ESTUARINE COASTAL AND SHELF SCIENCE 58.3(2003):487-498.

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