| 摘要: |
| 海水中除含有大量无机物质外，还含有种类繁多，但含量很低的有机物质，其含量约为C 0.5-2.0mg/L。海水有机物质可分为溶解有机物质(DOM)和颗粒有机物质(POM)。前者为主要组分，后者所含比例很小。在大洋中POM的主要来源有:①浮游生物，尤其是浮游植物活体、死骸及其分解碎屑;②海水中进行的DOM-POM的动力平衡产物。近岸海水还受河流流入的陆地POM和大气带入的陆源尘埃的影响。POM主要由蛋白质、碳水化合物、脂类等组成。POM是食碎屑动物的良好食物，它构成海洋食物链的一环，与水域生物生产力有直接的联系。POM中蛋白质含量以颗粒氨基酸(PAA)表示。Daumas(1976)曾报道过沿岸海水中PAA含量的季节变异，纪明侯等(1992年)于1980-1981年首次对青岛胶州湾内PAA含量在不同站位和不同季节中的变化特征进行调査研究。作者等继而于1982年7月、1983年10月和1984年5、7、8月乘“金星二号”考察船前后首次研究了渤海湾、黄河口和长江口附近水域中颗粒氨基酸的组成与含量在不同站位中的分布。所得结果如下。 |
| 关键词: 颗粒氨基酸 分布特征 |
| DOI： |
| 分类号: |
| 基金项目:中国科学院海洋研究所调查研究报告第4469号。 |
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| Studies on the Distribution of the Contents of Particulate Amino Acids in the Sea Water of Bohai Bay, Yellow River Estuary and Changjiang River Estuary |
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ZHANG Xingjun, JI Minghou
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Institute of Oceanology, The Chinese Academy of Sciences
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| Abstract: |
| The distribution of the contents of total particulate amino acids (ΣPAA) in surface seawater of Bohai Bay, Yellow River Estuary and Changjiang (Yangtze) River Estuary were studies by R/V “Golden Star No. 2” from 1982 to 1984. Near Bohai Bay, the contents of ΣPAA in surface seawater were lower(60-80μg/L) than those of most stations outside the Bay, where ΣPAA, were> 100μg/L. Near the Yellow River Estuary region exhibited higher contents of ΣPAA, reaching 600μg/L and even at other stations outside the estuary ΣPAA contents were 100μg/L or > 100μg/L. At several stations of the inland of Changjiang (Yangtze) River the contents of ΣPAA were about 200μg/L and decreased to 186-90μg/L in the lower course of the river. But near the region of Zhoushan Island they again increased to 200μg/L. It is probable that the increase of ΣPAA contents was due to the high density of growing plankton and high contents of organic substances there. |
| Key words: total particulate amino acids distribution |
