NDLI: Feeding selectivity of calanoid copepods on phytoplankton in Jangmok Bay, south coast of Korea

Content Provider	Springer Nature Link
Author	Jang, Min Chul Shin, Kyoungsoon Lee, Tongsup Noh, Il
Copyright Year	2010
Abstract	Grazing impacts of calanoid copepods on size-fractionated phytoplankton biomass [chlorophyll (Chl)-a] were measured in Jangmok Bay, Geoje Island, Korea, monthly from November 2004 to October 2005. The ingestion rate of calanoid copepods on total phytoplankton biomass ranged between 1 and 215 ng Chl-a copepod$^{−1}$ day$^{−1}$ during bottle incubations. Results indicated that microphytoplankton (> 20 μm) was the primary food source for calanoid copepods in grazing experiments on 3 phytoplankton size categories (< 3 μm, 3–20 μm, and > 20 μm). The ingestion rate on microphytoplankton showed a significant increase (r = 0.93, p < 0.01) with Chl-a concentration. Nanophytoplankton (3–20 μm) showed a negative ingestion rate from June 2005 to October 2005, but the reason is not completely understood. Calanoid copepods were unable to feed efficiently on picophytoplankton (< 3 μm) due to unfavorable size. Calanoid copepods removed between 0.1% and 27.7% (average, 3.6 ± 15.8%) of the phytoplankton biomass daily during grazing experiments. Grazing pressure was high in winter and early spring (January–March: 15.6–27.7%), while low in summer (June–August: −33.1–0.0%) and autumn (September–November: −1.4–5.1%). Results suggest that calanoid copepods play an important role in controlling the biomass and size structure of phytoplankton in winter and early spring.
Starting Page	101
Ending Page	111
Page Count	11
File Format	PDF
ISSN	17385261
Journal	Ocean Science Journal
Volume Number	45
Issue Number	2
e-ISSN	20057172
Language	English
Publisher	Korean Ocean Research and Development Institute and The Korean society of Oceanography
Publisher Date	2010-07-06
Publisher Place	Springer
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	calanoid copepods grazing Jangmok Bay Waste Water Technology Water Pollution Control Water Management Aquatic Pollution Marine & Freshwater Sciences Oceanography
Content Type	Text
Resource Type	Article
Subject	Oceanography

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