| 摘要: |
| 1997年2–3月和1998年7月，在东海海区乘“科学一号”考察船进行两个航次的调查，利用异养细菌特异示踪物[甲基-3H]胸腺嘧啶核苷(3H-Tdr)并入DNA的速率测定东海(27°–32°N，122°–130°E)异养细菌生产力(BP)。结果表明，1997年2–3月(冬季)异养细菌生产力较低[0.46–2.62μgC/(L*h)]，1998年7月(夏季)异养细菌生产力较高[3.50–15.70μgC/(L*h)]。冬季和夏季在长江口和410站附近都有一个异养细菌生产力的高值区。通过两个连续站的昼夜观测发现冬季异养细菌生产力变化是底层>中层>表层，夏季是中层>底层>表层。异养细菌生产力与初级生产力(PP)之比，即BP/PP，冬季的均值为0.17(0.04–0.30)，夏季的均值为0.32(0.21–0.43)。BP/PP冬季的高值区在长江口附近，夏季的高值区在111站附近，这与长江冲淡水有密切相关。 |
| 关键词: 异养细菌 生产力 东海 |
| DOI：10.11693/hyhz200006013013 |
| 分类号: |
| 基金项目:国家自然科学基金重点资助项目，49636210号;国家重点基础研究专项经费资助项目，G19990437号 |
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| DISTRIBUTION OF HETEROTROPHIC BACTERIAL PRODUCTION IN THE EAST CHINA SEA |
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XIAO Tian, WANG Rong
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Institute of Oceanology,The Chinese Academy of Sciences,Qingdao,266071
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| Abstract: |
| Heterotrophic bacterial production (BP) in the East China Sea (27°–32°N, 122°–130°E) was measured by using tritiated thymidine incorporation (TTI) method in winter, 1997 and summer, 1998. Results showed BP was higher in summer [1998, 3.50–15.70μgC/(L*h) ] than that in winter [1997, 0.46–2.62μgC/(L*h)]. BP horizontal distribution was characterized by a progressive seaward decrease along 32° section and from south to north along 2 section in the winter of 1997, but BP showed a progressive seaward increase along PN section in the winter of 1997 and in the summer of 1998. Vertical profile of BP showed that it was higher on the surface than that in the bottom on PN section in the winter of 1997 and summer of 1998, but it was opposite for section 2 and for 32° section in the summer of 1998. The high values of BP occurred around the Changjiang River estuary and station 410. The results of anchor tow stations showed that vertical variation of BP were bottom> middle> surface in winter and middle> bottom> surface in summer.
The average ratio of Heterotrophic Bacterial Production/Primary Production (BP/PP) was 0.17(0.04–0.30) in winter and 0.32 (0.21–0.43) in summer. The ratios were high around the Changjiang River estuary in w inter and around station 111 in summer. Vertical distribution of BP/PP showed the ratio was higher in bottom and middle than that on surface at anchor 111 st. and 409’st. It was similar to BP at anchor 111 st and 409’ st. |
| Key words: Heterotrophic bacteria, Productivity, The East China Sea |
