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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 | |
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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