| 摘要: |
| 于1994年4月8–30日运用14C，15N同位素示踪法现场观测东海的初级生产力和新生产力。结果表明，初级生产力变化在200–2770 mg/(m2?d)之间，高值出现于开阔深水区和近海富营养区，低值出现于近岸浑水区和外海贫营养区；东海初级生产力的主要限制因子是营养盐可得性和光照条件，在不同海区二者的作用地位有所不同。新生产力的变动范围在15–1372 mg/(m2?d)山之间；剧烈的波动主要取决于氧化态、还原态氮的供给比例。f比变化在0.05–0.70。 |
| 关键词: 初级生产力 新生产力 东海 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目，49476298号 |
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| PRIMARY PRODUCTION AND NEW PRODUCTION IN SPRING IN THE EAST CHINA SEA |
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JIAO Nian-zhi,WANG Rong,LI Chao-lun
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Insititule of Oceanology, The Chinese Academy of deiences, Qingdao, 266071
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| Abstract: |
| Primary production and new production in the East China Sea area (25-32 o N, coastline to l29oE) were investigated in terms an in situ simulation experiment using 14C and 15N tracer techniques in April, 1994. The results show that primary production ranges between 200-2770 mg/(m2.d); during the period of experiment, high values occurred in the coastal eutrophic area and the front area of the open waters, and low values occurred in the muddy waters around the Changjiang River estuary and oligotrophic areas of the oceanic waters. New production had a similar horizontal distribution pattern to the primary production, with more drastic variations of 15-1372 mg/(m2.d). According to this investigation, primary production in the East China Sea is regulated mainly by the availabilities of nutrients and light which are controlled by large scale physical processes such as the Kuroshio Current, discharges from the Changjiang River, the Taiwan Warm Current and the Yellow Sea Cold Water Masses. The f-ratio ranging from 0.05 to 0.70 corresponded closely to the availability of specific nitrate [(NO3--N) / (NO3--N + NH4+-N)]. New production, although correlated very well to primary production, appears to be controlled preferably by the proportion of nitrate in the total nitrogen. As there exists a great deal of ammonium input from outside the system, especially in the estuarine areas, the real f-ratio values could be even higher than that recorded in this study. |
| Key words: Primary production, New production, East China Sea |
