| Standing stock and community structure of photosynthetic picoplankton in the northern South China Sea |
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| 作者姓名： | NING Xiuren LI W K W CAI Yuming LIU Chenggang SHI Junxian |
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| 作者单位： | Bedford Institute |
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| 基金项目： | 国家自然科学基金，the Canadian Ministry of Fisheries and Ocean Science for the financial support for the study |
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| 摘 要： | 1 Introduction Forthe lastm ore than 20 a,ow ing to the develop-m ent of observation and experim ent technologies form arine m icroorganism s,m arine biologistshave discov-ered m any m icroorganism s w hich are difficult to beobserved by com m on m icroscope before. T hus, thecognition to the m arine phytoplankton com m unitiesand the structure of food chains has achieved im por-tantprogress.E specially,w ith the developm entand ap-plication of epifluorescence m icroscopy and flow cy-tom etry…
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| 关 键 词： | Synechococcus Prochlorococcus photosynthetic picoeukaryotes cell abundance biomass community structure spatial distribution |
| 收稿时间： | 2004/4/11 0:00:00 |
| 修稿时间： | 2004/11/11 0:00:00 |
Standing stock and community structure of photosynthetic picoplankton in the northern South China Sea |
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| NING Xiuren,LI W K W,CAI Yuming,LIU Chenggang,SHI Junxian.Standing stock and community structure of photosynthetic picoplankton in the northern South China Sea[J].Acta Oceanologica Sinica,2005,24(2):57-76. |
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| Authors: | NING Xiuren LI W K W CAI Yuming LIU Chenggang and SHI Junxian |
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| Institution: | 1.Key Laboratories of Oceanic Dynamic Processes & Satellite Oceanography and Submarine Sciences of State Oceanic Administration, Hangzhou 310012, China;Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China2.Bedford Institute of Oceanography, PO Box 1006, Dartmouth, B2Y 4A2, Canada3.Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China |
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| Abstract: | The investigation on community structure of standing stock of photosynthetic picoplankton: Synechococcus (Syn), Prochlorococcus (Pro) and Picoeukaryotes (Euk) and their environmental regulation mechanisms in the northern South China Sea was carried out in the summer of 1999. The results showed that the average abundances of Syn, Pro and Euk in the study sea areas were (5.0± 7.6)×104cell/cm3 (51%), (4.6±4.2)×104 cell/cm3 (47%) and (1.8±1.1)×l03 cell/cm3 (2%) respectively, and those of their carbon biomass were (12.5±18.9) μg/dm3 (74%), (2.7±2.5) μg/dm3 (16 %) and (1.7±1.0) μg/dm3 (10%). The most of high values of Syn appeared in the estuaries, coastal zone and continental shelf in the sea area to the east of Leizhou Peninsula and Hainan Island where nutrients were rich, and those appeared in the Beibu Gulfwere the second, while those appeared in continental slope and open sea were tens times lower than the above those. Its distribution in water column was mainly above the thermocline and its abundance below it sharply decreased. Two different populations of Pro were found, the surface population and deep one. The distribution pattern of the former was similar to that of Syn; while with marked difference from that of the former, the abundance and biomass of the latter markedly increased towards outer sea, continental slope and open sea where nutrients were poor; the high values in the water column mainly appeared at the bottom of euphoric zone and above the nitrocline, where it often vigorously grow. The distribution difference of Euk in the various sea areas is not as obvious as those of Syn and Pro, but it was high in coastal and shelf waters and low in continental slope and open sea. The high values in the water column were mostly appeared at the bottom of euphoric zone. This difference of distribution pattern for the three type of photosynthetic picoplankton depends on environmental effects and their ecophysiological differences. |
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| Keywords: | Synechococcus Prochlorococcus photosynthetic picoeukaryotes cell abundance biomass community structure spatial distribution |
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