동열대태평양의 Kodos 지역에서의 식물플랑크톤 군집 : flow cytometry, hplc 그리고 현미경을 통한 조사

Title
동열대태평양의 Kodos 지역에서의 식물플랑크톤 군집 : flow cytometry, hplc 그리고 현미경을 통한 조사
Alternative Title
Phytoplankton community structure in the KODOS area, eastern tropical Pacific: determined by flow cytometry, HPLC pigment and microscopy
Author(s)
노재훈; 유신재; 노승목; 김웅서; 손승규
KIOST Author(s)
Noh, Jae Hoon(노재훈)Son, Seung Kyu(손승규)
Publication Year
2005-11-03
Abstract
The effects of environmental forcing on phytoplankton distribution patterns were investigated for convergence(5°N), divergence(9°N~ 10°30′N) and oligotrophic(17°N) sites in the tropical eastern Pacific during 2003 KODOS(Korea Deep Ocean Study) cruises. The distributions of picoplankton populations, Prochlorococcus, Synechococcus and picoeukaryotes were determined by flow cytometric analyses. Nano and micro phytoplankton were enumerated by LM and fluorescence microscopy. In addition, phytoplankton marker pigments were estimated using HPLC. Prochlorococcus showed consistently high abundance in the surface mixed layers of all sites at 1x105~3x105cells㎖-1 and showed declining abundance below these layers. However, these decreasing rates were not particularly sharp with considerably high abundance of 1x104cells㎖-1 or higher even at 100m depth. Vertical profiles of Synechococcus and picoeukaryotes were generally parallel to each other in all sites. A clear abundance maximum was observed at divergence site at or slightly above the pycnocline depth. Higher abundance was observed at the surface mixed layer for convergence site but a sharp decrease was observed below the pycnocline. However, there was no significant abundance fluctuation with depth at other oligotrophic sites(17°N). Integrated cell abundance of Prochlorococcus was high in the oligotrophic site at 2.17x1013cellsm-2, and low in the convergence site at 0.88x1013cellsm-2. Opposite patterns were observed for Synechococcus and picoeukaryotes where relatively high integrated cell abundances were shown in the convergence site. Diatom in the divergence site showed high abundance but showed low abundance in the oligotrophic site. Also, relatively high abundance patterns were observed in the surface layer than SCM layer. Fucoxanthin, marker pigment of diatom, also indicated a similar pattern with diatom distribution. Dinoflagellates also showed similar patterns with diatom in their cell and marker pigment(pe
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/31251
Bibliographic Citation
2005년도 추계 학술발표대회 요약집(Proceedings of the Autumn Meeting, 2005 of the Korean Society of Oceanography), pp.103 - 104, 2005
Publisher
한국해양학회
Type
Conference
Language
English
Publisher
한국해양학회
Related Researcher
Research Interests

marine chemistry,Environmental Monitoring,resource development,해양화학,환경모니터링,자원개발

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