[논문]Flow cytometer를 이용한 열대 동태평양의 독립영양 극미소 플랑크톤 연구

노재훈; 유신재; 이미진; 손승규; 김웅서

doi:10.4217/opr.2004.26.2.273

[국내논문] Flow cytometer를 이용한 열대 동태평양의 독립영양 극미소 플랑크톤 연구
A Flow Cytometric Study of Autotrophic Picoplankton in the Tropical Eastern Pacific 원문보기

Ocean and polar research, v.26 no.2, 2004년, pp.273 - 286

노재훈 (한국해양연구원 해양생물자원연구본부) , 유신재 (한국해양연구원 해양생물자원연구본부) , 이미진 (한국해양연구원 정책조정실) , 손승규 (한국해양연구원 해저환경.자원연구본부) , 김웅서 (한국해양연구원 해저환경.자원연구본부)

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The effects of environmental forcing on autotrophic picoplankton distributional patterns were investigated for convergence ($5^{\circ}N$), divergence ($9^{\circ}N-10^{\circ}30'N$) and oligotrophic ($17^{\circ}N$) sites in the tropical eastern Pacific during 2001 and 2003 KODOS (Korea Deep Ocean Study) cruises. The distributions of picoplankton populations - Prochlorococcus, Synechococcus and picoeukaryotes algae - were determined by flow cytometric analyses. Latitudinal variations in abundance maxima, vertical profiles, integrated abundance (0-150 m), and estimated carbon biomass were contrasted for each site according to three hydrological conditions. Prochlorococcus showed consistently high abundance in the surface mixed layers of all sites at $1\;{\times}\;10^5{\sim}3\;{\times}\;10^5\;cells\;ml^{-1}$ and showed declining abundance below these layers. However, these decreasing rates were not particularly sharp showing considerably high abundance at $1\;{\times}\;10^4\;cells\;ml^{-1}$ or higher even at 100 m 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 more oligotrophic site ($17^{\circ}N$). Integrated cell abundance of Prochlorococcus was high in the oligotrophic site at $2.17\;{\times}\;10^{13}\;m^{-2}$, and low in the convergence site at $0.88\;{\times}\;10^{13}\;m^{-2}$. However, opposite pattern was observed for Synechococcus and picoeukaryotes where relatively high integrated cell abundance was shown in the convergence site. Estimated carbon biomass of Prochlorococcus contributed 30.4-80.3% of total autotrophic picoplankton carbon showing the highest contribution in the oligotrophic site and the lowest contribution in the convergence site. Synechococcus contribution of total autotrophic picoplantkon carbon biomass was lower than 5.8% for most of sites except the convergence site where Synechococcus contributed 23.2% of picoplankton carbon biomass. Carbon biomass of picoeukaryotes was 18.8-46.4% showing the highest carbon biomass at the convergence site. Overall, Prochlorococcus showed higher cell abundance and carbon biomass and exhibited different reaction to hydrological conditions when compare with the other two major autotrophic picoplankton groups.

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[국내논문] Flow cytometer를 이용한 열대 동태평양의 독립영양 극미소 플랑크톤 연구
A Flow Cytometric Study of Autotrophic Picoplankton in the Tropical Eastern Pacific 원문보기

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[국내논문] Flow cytometer를 이용한 열대 동태평양의 독립영양 극미소 플랑크톤 연구 A Flow Cytometric Study of Autotrophic Picoplankton in the Tropical Eastern Pacific 원문보기

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[국내논문] Flow cytometer를 이용한 열대 동태평양의 독립영양 극미소 플랑크톤 연구
A Flow Cytometric Study of Autotrophic Picoplankton in the Tropical Eastern Pacific 원문보기