| 2008年夏季白令海粒度分级叶绿素a和初级生产力 |
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| 引用本文： | 刘子琳,陈建芳,刘艳岚,高生泉,李宏亮,张海生.2008年夏季白令海粒度分级叶绿素a和初级生产力[J].海洋学报,2011,33(3):148-157. |
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| 作者姓名： | 刘子琳 陈建芳 刘艳岚 高生泉 李宏亮 张海生 |
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| 作者单位： | 1.海洋生态系统与生物地球化学国家海洋局重点实验室, 浙江 杭州 310012;国家海洋局 第二海洋研究所 浙江 杭州 310012 |
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| 基金项目： | 国家自然科学基金(40876103;40876105;40476004);中国第三次北极科学考察资助项目。 |
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| 摘 要： | 2008年7月我国第三次北极科学考察中在白令海不同区域设立BR断面、NB断面和BS断面,对200 m以浅海水进行叶绿素a浓度和初级生产力的现场观测,对部分观测站进行微型、微微型光合浮游生物的粒级结构分析,结果表明,在白令海叶绿素a和初级生产力区域性特征明显,深海海盆中BR断面表层叶绿素a浓度为0.190～0.976μg...
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| 关 键 词： | 叶绿素a浓度 初级生产力 粒度分级 白令海 |
| 收稿时间： | 2010/8/22 0:00:00 |
The size-fractionated chlorophyll a concentration and primary productivity in the Bering Sea in the summer of 2008 |
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| LIU Zi-lin,CHEN Jian-fang,LIU Yan-lan,GAO Sheng-quan,LI Hong-liang and ZHANG Hai-sheng.The size-fractionated chlorophyll a concentration and primary productivity in the Bering Sea in the summer of 2008[J].Acta Oceanologica Sinica (in Chinese),2011,33(3):148-157. |
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| Authors: | LIU Zi-lin CHEN Jian-fang LIU Yan-lan GAO Sheng-quan LI Hong-liang and ZHANG Hai-sheng |
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| Institution: | 1.Key Laboratory of State Oceanic Administration for Marine Ecosystem and Biogeochemistry, Second Institute of Oceanogranphy,State Oceanic Administration,Hangzhou 310012,China;Second Institute of Oceanography, State Ocean Administration,Hangzhou 310012,China2.Hangzhou Academy of Scientific Professional Technology, Hangzhou 310012, China |
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| Abstract: | Investigations of standing stock of phytoplankton (chlorophyll a) and primary productivity were carried out in Sections BR, NB and BS in the Bering Sea between 53°16.8'~66°00'N and 170°00'E~167°30'W during the 3nd Chinese arctic research expedition in July 2008. The size-fractionated chlorophyll a concentration and primary productivity were determined at some surveyed stations. The results show that the chlorophyll a concentration and the primary productivity appear obviously to be areal characteristics. The surface chlorophyll a concentration is 0.190~0.976 μg/dm3, and the average value is 0.442 μg/dm3 in the transect of BR. And the surface chlorophyll a concentration is 0.142~22.405 μg/dm3(the average value is 2.077 μg/dm3) in the continental shelf zone. The chlorophyll a concentration in the transect BR is lower than that in the transects NB and BS. The chlorophyll a concentration above the depth 50 m is higher than that below the depth 50 m, The maximum concentrations appear in the depth 30~40 m. The potential primary productivities (C) vary from 0.173 to 0.918 mg/(m3·h) in the surveyed area, with the average rate of 0.50 mg/(m3·h). The primary productivity in the continental shelf zone is much higher than that of the deep water zone. The assimilation index of photosynthesis is 0.29~1.03 mg/(mg·h) in the surveyed area, with the average rate of 0.74 mg/(mg·h). The results of the size-fractionated chlorophyll a and the primary productivity show that the nanoplankton and picoplankton account for 45.08% of the majority of the total chlorophyll a and 69.48% of total primary productivity in the surveyed area. The contributions of the microplankton to the total chlorophyll a and primary productivity are 54.92% and 30.52%, respectively. The nanoplankton and picoplankton play an important role in the ecosystem of the surveyed area. |
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| Keywords: | chlorophyll a primary productivity size-fractionated Bering Sea |
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