| 2008年夏季白令海和北冰洋异养浮游细菌丰度与分布特征 |
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| 引用本文： | 林凌,何剑锋,张芳,蔡明红,陈建芳,赵云龙.2008年夏季白令海和北冰洋异养浮游细菌丰度与分布特征[J].海洋学报,2011,33(2):166-174. |
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| 作者姓名： | 林凌 何剑锋 张芳 蔡明红 陈建芳 赵云龙 |
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| 作者单位： | 1.华东师范大学 生命科学学院,上海200062;国家海洋局极地科学重点实验室,中国极地研究中心,上海 200136 |
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| 基金项目： | 国家自然科学基金面上项目(41076130);海洋公益行业专项(200805095);国家海洋局青年基金项目(2010116);国家海洋局海洋生态系统与生物地球化学重点实验室开放研究基金(LMEB200902);华东师范大学优秀博士论文基金(2010041)。 |
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| 摘 要： | 利用2008年夏季我国第3次北极科学考察资料,基于流式细胞技术,对白令海北部陆架区的微微型浮游植物丰度、细胞大小(碳含量)、色素浓度的分布特征进行了分析,并对该类群的环境适应性进行了研究。结果表明,微微型浮游植物中仅含聚球藻和真核藻,其丰度范围分别为0.14×106 2.69×106和0.23×106-12.49×106个/dm3。聚球藻的叶绿素a和藻红蛋白含量、微微型真核藻的叶绿素a含量与类群丰度以及微微型真核藻的类胡萝卜素含量与细胞大小间均存在同向变化趋势。两类藻偏向于喜温嗜淡型,更适合在寡营养环境中保持较高的丰度,但能在高营养盐浓度下形成相对较高的碳含量。越接近陆地,细胞越小,丰度越大,碳含量及FL2/FL3越低;所处层位越深、纬度越高,则细胞越大,碳含量及FL2/FL3越高。北极气温升高和径流量的增加有利于陆架区微微型浮游植物类群丰度的增加。
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| 关 键 词： | 北冰洋 白令海 异养细菌 丰度 分布 |
| 收稿时间： | 2010/8/12 0:00:00 |
Heterotrophic bacterial abundance and distribution in the Bering Sea and the Arctic Ocean in the summer of 2008 |
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| LIN Ling,HE Jian-feng,ZHANG Fang,CAI Ming-hong,CHEN Jian-fang and ZHAO Yun-long.Heterotrophic bacterial abundance and distribution in the Bering Sea and the Arctic Ocean in the summer of 2008[J].Acta Oceanologica Sinica (in Chinese),2011,33(2):166-174. |
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| Authors: | LIN Ling HE Jian-feng ZHANG Fang CAI Ming-hong CHEN Jian-fang and ZHAO Yun-long |
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| Institution: | College of Life Science, East China Normal University, Shanghai 200062, China;Key Laboratory for Polar Science of State Oceanic Administration, Polar Research Institute of China, Shanghai 200136, China;Key Laboratory for Polar Science of State Oceanic Administration, Polar Research Institute of China, Shanghai 200136, China;Key Laboratory for Polar Science of State Oceanic Administration, Polar Research Institute of China, Shanghai 200136, China;Key Laboratory for Polar Science of State Oceanic Administration, Polar Research Institute of China, Shanghai 200136, China;Key Laboratory of Marine Ecosystem and Biogeochemistry of State Oceanic Administration, the Second Institute of Oceanography, Hangzhou, 310012, China;College of Life Science, East China Normal University, Shanghai 200062, China |
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| Abstract: | The abundance, cell size (cellular carbon content), and cellular pigments of picophytoplankton on the shelf area of the north Bearing Sea(61°29' 64°21'N, 168°00' 174°32'W) were analyzed by flow cytometry(FCM).A statistical analysis was used to study the response of the picophytoplankton to environmental changes. Synechococcus and picoeukaryotes were the only type of the picophytoplankton community; and their respective cell abundance was 0.01×106 2.69×106 and 0.47×106 13.20×106 cells/dm3. The chlorophyll a, phycoerythrin, and the cell size (cellular carbon content) had the same changing trend with the change of environmental factors. Comparatively, the chlorophylls a and the cell abundance, and the carotenoids and the cell size (cellular carbon content) of the picoeukaryotes had the same changing trends, respectively. Both salinity and nutrients had significant influence on the cellular carbon content and the ratio of carotinoids to chlorophylls a of picoeukaryotes. High nutrient concentration was prone to induce high ratio of cellular carbon content to chlorophylls a. Both synechococcus and picoeukaryotes preferred relatively high temperature and low salinity; and were easily to form high cell abundance in oligotrophic water, whereas in seawaters with relatively high nutrient concentration were prone to form cells with high cellular carbon content.The cell abundance of picoeukaryotes decreased intensely when the nitrogen-phosphorus ratio greater than 7. The cell abundance was relatively high, whereas the cell size (cellular carbon content) and the phycoerythrin-chlorophyll a ratio were relatively small. Comparatively, the cell size (cellular carbon content) and the phycoerythrin-chlorophyll a ratio were relatively large and the cell abundance was relatively low when the picophytoplankton was at relatively deep water layers and high latitudes. The ascending of the water temperature and the increase of the inflows of freshwater from the continent can increase both the abundance and the variety of picophytoplankton on the continental shelf of the north Bering Sea. |
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