Grazing Impact of the Copepod Calanus sinicus on Phytoplankton in the Northern East China Sea in Late Spring SCIE SCOPUS KCI

Cited 1 time in WEB OF SCIENCE Cited 2 time in Scopus
Title
Grazing Impact of the Copepod Calanus sinicus on Phytoplankton in the Northern East China Sea in Late Spring
Author(s)
Kim, Garam; Kang, Hyung-Ku
KIOST Author(s)
Kim, Garam(김가람)Kang, Hyung Ku(강형구)
Publication Year
2018-06
Abstract
We investigated the feeding habits of Calanus sinicus during its four developmental stages as copepodite 4 (CIV), copepodite 5 (CV), adult males and females in early June 2015 at 12 sampling stations along the southern coast of Korea to the northern East China Sea, to better understand the role of C. sinicus in controlling phytoplankton stocks. Ingestion rate, daily ration as body carbon, population ingestion rate, and grazing impact were estimated using the gut pigment method. The mean biomass of CVs was the greatest (13.5 mg C m(-3)) and that of adult males was the lowest (0.7 mg C m(-3)). The ingestion rate per C. sinicus individual tended to increase with developmental stage, with the highest rate in adult females (519 ng chl ind(-1) d(-1)) and the lowest rate in CIVs (305 ng chl ind(-1) d(-1)). A significant correlation was found between ingestion rate and temperature, but not salinity or chlorophyll-a concentration. The daily ration of C. sinicus as body carbon significantly decreased with increased body weight, with the highest value found in CIVs (66.4%) and the lowest value in adult males (30%). Despite the high ingestion rate of the adults, the mean grazing impact of C. sinicus on phytoplankton biomass, in terms of chlorophyll-a concentration, was the highest in CVs (2.6%), followed by CIVs and adult females, and was the lowest in adult males (0.1%). The higher grazing impact of copepodites than adults underscores the importance of evaluating copepodite stages in the feeding studies of marine food webs.
ISSN
1738-5261
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/40337
DOI
10.1007/s12601-018-0010-6
Bibliographic Citation
OCEAN SCIENCE JOURNAL, v.53, no.2, pp.225 - 237, 2018
Publisher
KOREA OCEAN RESEARCH DEVELOPMENT INST
Subject
FRACTIONATED MESOZOOPLANKTON BIOMASS; GUT CONTENTS; YELLOW SEA; INGESTION RATES; PLANKTONIC COPEPODS; MARINE ECOSYSTEMS; GIRONDE ESTUARY; COASTAL WATERS; SOUTHERN-OCEAN; EGG-PRODUCTION
Keywords
copepod; Calanus sinicus; copepodites; ingestion rate; daily ration; grazing impact; gut pigment method; phytoplankton
Type
Article
Language
English
Document Type
Article
Publisher
KOREA OCEAN RESEARCH DEVELOPMENT INST
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