| 楚科奇海及其海台区粒度分级叶绿素a与初级生产力 |
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| 引用本文： | 刘子琳,陈建芳,张涛,陈忠元,张海生.楚科奇海及其海台区粒度分级叶绿素a与初级生产力[J].生态学报,2007,27(12):4953-4962. |
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| 作者姓名： | 刘子琳 陈建芳 张涛 陈忠元 张海生 |
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| 作者单位： | 1. 国家海洋局,海洋生态系统与生物地球化学重点实验室,国家海洋局第二海洋研究所,杭州,310012
2. 卫星海洋环境动力学国家重点实验室,国家海洋局第二海洋研究所,杭州,310012 |
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| 基金项目： | 国家自然科学基金;中国第二次北极科学考察资助项目 |
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| 摘 要： | 2003年夏季中国第二次北极科学考察期间,在楚科奇海及其海台区进行了叶绿素a浓度与初级生产力的现场观测。结果表明,观测海区叶绿素a浓度范围为0.009～30.390μg/dm3。表层浓度为0.050～4.644μg/dm3,平均值为(0.875±0.981)μg/dm3;陆架区次表层和底层的浓度高于表层,海台区深层水的浓度较低,200m层的浓度为(0.015±0.007)μg/dm3。水柱平均叶绿素a浓度区域性特征明显,陆架区高于海台区。R断面进行3趟重复观测,平均叶绿素a浓度分别为(2.564±1.496)μg/dm3,(1.329±0.882)μg/dm3和(0.965±0.623)μg/dm3,浓度呈下降趋势。观测站潜在初级生产力为0.263～4.186mgC/(m.3h),陆架区平均潜在初级生产力((2.305±1.493)mgC/(m.3h))比海台区((0.527±0.374)mgC/(m.3h))高近4倍。平均同化数为(1.22±1.14)mgC/(mgChla.h)。观测区细胞粒径>20μm的小型浮游生物对总叶绿素a浓度和初级生产力的贡献率分别为63.13%和65.16%,细胞粒径2.0～20μm的微型浮游生物和细胞粒径<2.0μm的微微型浮游生物对总叶绿素a和初级生产力的贡献率相差甚小,其对总叶绿素a浓度的贡献率分别为19.18%和17.69%,对总初级生产力的贡献率分别为20.11%和14.73%。
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| 关 键 词： | 叶绿素a浓度 初级生产力 粒度分级 楚科奇海 北极 |
| 文章编号： | 1000-0933(2007)12-4953-10 |
| 收稿时间： | 15 March 2007 |
| 修稿时间： | 2007年3月15日 |
The Size-fractionated chlorophyll a concentration and primary productivity in the Chukchi Sea and its northern Chukchi Plateau |
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| LIU Zilin,CHEN Jianfang,ZHANG Tao,CHEN Zhongyuan and ZHANG Haisheng.The Size-fractionated chlorophyll a concentration and primary productivity in the Chukchi Sea and its northern Chukchi Plateau[J].Acta Ecologica Sinica,2007,27(12):4953-4962. |
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| Authors: | LIU Zilin CHEN Jianfang ZHANG Tao CHEN Zhongyuan and ZHANG Haisheng |
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| Institution: | aKey Laboratory of Oceanic Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration of China, Hangzhou 310012, China;bState Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration of China, Hangzhou 310012, China |
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| Abstract: | Investigations on chlorophyll a and primary productivity were carried out in the Chukchi Sea and its northern Chukchi Plateau during the 2nd Chinese National Arctic Research Expedition in the summer of 2003. The results showed that chlorophyll a concentrations were 0.009–30.390 μg/dm3 at the surveyed waters; the surface chlorophyll a concentrations were 0.050–4.644 μg/dm3 and the average value was (0.875±0.981) μg/dm3 in the surveyed area. In the Chukchi Sea Shelf, chlorophyll a concentrations at the depth from 10 m to bottom were higher than that in the surface water, and the concentrations were lower at the depth below 75 m in the Chukchi Plateau. Chlorophyll a concentrations descended in 3 sequential samplings on Transect R, with average values of (2.564±1.496) μg/dm3, (1.329±0.882) μg/dm3 and (0.965±0.623) μg/dm3, respectively. The potential primary productivity ((2.305± 1.493) mgC/(m3·h)) in the Chukchi Sea was higher than that ((0.527±0.374) mgC/(m3·h)) in the Chukchi Plateau. The results of the size-fractionated chlorophyll a and primary productivity showed that microplankton accounted for the majority of the total chlorophyll a (63.13%) and primary productivity (65.16%) at the survey stations. The contributions of the nanoplankton and picoplankton to the total chlorophyll a and primary productivity were roughly the same. |
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| Keywords: | chlorophyll a primary productivity size-fractionated the Chukchi Sea Arctic |
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