Daily variations of red-tide organisms and factors controlling their abundance in Jangmok Bay during summer 2003

Title
Daily variations of red-tide organisms and factors controlling their abundance in Jangmok Bay during summer 2003
Author(s)
이원제; 박남주; 이우진; 장풍국; 장민철; 이재도; 신경순; 장만
KIOST Author(s)
Jang, Pung Guk(장풍국)Shin, Kyoung Soon(신경순)
Alternative Author(s)
이원제; 이우진; 장풍국; 장민철; 이재도; 신경순; 장만
Publication Year
2003-11-29
Abstract
To estimate the abundance of red-tide organisms and understand factors controlling the abundance in the planktonic ecosystem of Jangmok Bay, the study was conducted daily during summer (n=47). The abundance of phytoplankton was in the range of 0.06 – 12.23x106 cells/l (mean 2.63±3.04x106 cells/l). Twenty-four high concentrations of phytoplankton abundance (n=6: >5 x106 cells/l, n=18: 1-5 x106 cells/l) occurred mainly by the 4 dominant species, accounting for over 5% of the total phytoplankton abundance; Chaetoceros sp1, Chaetoceros sp6, Skeletonema costatum, Thalassionema nitzschioides. The contribution of the 4 dominant species to the total phytoplankton abundance was in the range of 16.6-88.9% (mean 59.8±21.5 %). We found that during the summer the abundance of phytoplankton and 4 dominant species had negative relationships with inorganic nutrients, temperature and salinity, and no relationship with zooplankton. This study suggests that the phytoplankton abundance might be controlled by resource limitation (bottom-up) such as concentrations of inorganic nutrients, that predation effects of zooplankton (top-down) might not be significant, and red-tides occurred in Jangmok Bay might be caused by increasing inorganic nutrients due to rainfalls.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/32028
Bibliographic Citation
Proceedings for The 1st Joint Korea/ Japan Workshop on Marine Environmental Engineering, pp.133 - 144, 2003
Publisher
The Korean Society for Marine Environmental Engineering & Research Commitee on Marine Environment, Society of Naval Achitects of Japan
Type
Conference
Language
English
Publisher
The Korean Society for Marine Environmental Engineering & Research Commitee on Marine Environment, Society of Naval Achitects of Japan
Related Researcher
Research Interests

Plankton ecology and physiology,Risk assessment,Ship ballast water,플랑크톤 생리, 생태,위해성평가,선박평형수

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