2008年夏季白令海粒度分级叶绿素a和初级生产力

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

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
2.
杭州科技职业技术学院, 浙江杭州 310012

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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- 收稿日期: 2010-08-22

The size-fractionated chlorophyll a concentration and primary productivity in the Bering Sea in the summer of 2008

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,China
2.
Hangzhou Academy of Scientific Professional Technology, Hangzhou 310012, China

摘要

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0.190~0.976 μg/dm³,平均值为0.442 μg/dm³;在陆架区表层叶绿素a浓度为0.142~22.405 μg/dm³,平均值为2.077 μg/dm³;在BR断面叶绿素浓度大大低于陆架区的NB断面和BS断面;50 m以浅真光层上部浅水层的叶绿素浓度高于真光层下部深层水,观测站叶绿素a浓度最大值大多出现在30~40 m水层;水柱平均叶绿素a浓度呈现白令海峡大于白令陆架区大于白令海盆区大于北太平洋西部海域大于白令陆坡区的区域性分布特征;在8个观察站真光层内潜在初级生产力(C)为0.173~0.918 mg/(m³·h),平均初级生产力为0.50 mg/(m³·h));陆架海区的初级生产力高于深海区;光合作用同化指数为0.29~1.03 mg/(mg·h),平均生产力指数为0.74 mg/(mg·h);观测区浮游生物细胞以粒径小于20 μm的微型加微微型浮游生物居重要位置,两者对总叶绿素a浓度和总初级生产力的贡献率分别为45.08%和69.48%,细胞粒径大于20 μm的微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54.92%和30.52%,其中陆架区微小型对总叶绿素a浓度的贡献率高于60%。
- 叶绿素a浓度 /
- 初级生产力 /
- 粒度分级 /
- 白令海
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.
- chlorophyll a /
- primary productivity /
- size-fractionated /
- Bering Sea

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参考文献(24)

陈建芳,张海生,金海燕,等, 北极陆架沉积碳埋藏及其在全球碳循环中的作用 [J]. 极地研究, 2004, 16(3):193-201.

陈立奇,高众勇,王伟强,等,白令海盆p_CO₂分布特征及其对北极碳汇的影响 [J]. 中国科学: D辑,2003,32(5):430-440.

AYDIN K,MUETER F, The Bering Sea-A dynamic food web perspective [J]. Deep-Sea Research: II, 2007, 54:2501-2525.

COTA G F, POMEROY L R, HARRISON W G, et al. Nutrients, primary production and microbial heterotrophy in the south-eastern Chukchi Sea: arctic summer nutrient depletion and heterotrophy [J]. Mar Ecol Prog Ser, 1996, 135: 247-258.

GOSSELIN M, LEVASSEUR M, WHEELER P A, et al. New measurements of phytoplankton and ice algal production in the Arctic Ocean [J]. Deep-Sea Research: II, 1997, 44(8):1623-1644.

SHIOMOTO A.Subsurface chlorophyll a maximum in the coastal front around St. Paul Island [J]. Polar Biosci. 2006, 20:21-29.

SPRINGER A M, MCROY C P. The paradox of pelagic food webs in the northern Bering Sea:III. Patterns of primary production [J]. Continental Shelf Research, 1993, 13(5-6): 575-599.

STEIN R, MACDONALD R W. The Organic Carbon Cycle in the Arctic Ocean [M]. Springer, 2003:1-81, 193-203.

HAN D, TAKAHASHI M M. Chlorophyll a biomass of netplankton in surface waters of the northern Pacific Ocean and in adjacent seas from summer to autumn [J]. J Oceanogr., 2000, 56: 213-222

LIU Z, CHEN J, CHEN Z, et al. Primary productivity and the standing stock of photo-plankton in the Bering Sea during the summer of 2003 [J]. Acta Ecologica Sinica, 2005, 24(6): 127-134.

刘子琳,陈建芳,陈忠元,等. 白令海光合浮游生物现存量和初级生产力[J]. 生态学报,2006,26(5):1345-1351.

国家技术监督局. GB-12763.4 海洋调查规范--海洋生物调查[S].1991.

PARSONS T R, MAITS Y, LALLI C M. A Manual of Chemical and Biological Methods for Seawater Analysis . 1984.

SHIOMOTO A, ASAMI H. High-west and low-east distribution patterns of chlorophyll a, primary productivity and diatoms in the subarctic north Pacific surface waters, midwinter 1996[J].J Oceanogr, 1999, 55: 493-503.

SAINO T, MIYATA K, HATTORI A. Primary productivity in the Bering and Chukchi Seas and in the northern north Pacific in 1978 Summer[J]. Bull Plank Soci Japan, 1979,26(2):96-103.

AYDIN K, MUTER F. The Bering Sea-A dynamic food perspective[J]. Deep-Sea Research: II, 2007,54: 2501-2525.

LI W K, SUBBA R, HARRISON W G, et al. Autotrophic picoplankton in the tropical ocean[J]. Science, 1983, 219: 292-295.

El-SAYED S Z, TAGUCHI S. Primary production and standing crop of phytoplankton along the ice-edge in the Weddell Sea[J]. Deep-Sea Res, 1981, 28: 1017-1032.

MEI Z P, LEGENDRE L, GATTON Y, et al. Phytoplankton production in the North Water Polynya: size-fractionas and cabon fluxes, April-July 1998[J].Mar Ecol Prog Ser, 2003, 256: 13-27.

WILLIAMS P J LeB. Incorporation of microheterotrophic processes into the classical paradigm of the planktonic food web[J]. Kieler Meeresforsch. 1981, 5: 1-28.

HODEL H, KRISTIANSEN S. The importance of small-celled phytoplankton in spring blooms at the marginal ice zone in the northern Barents Sea[J]. Deep-sea Research: II, 2008,55:2176-2185.

刘子琳,宁修仁,朱根海,等. 1989/1990年南大洋环极表层水浮游植物分级生物量、初级生产力和颗粒有机碳的分布 //宁修仁,等.中国海洋学文集,第9集.北京:海洋出版社,1998: 22-30.

宁修仁,刘子琳,朱根海,等. 1989/1990年南极普里兹湾及其毗邻海域浮游植物现存量和生产力的粒度结构及其环境制约 //宁修仁,等.中国海洋学文集,第9集.北京:海洋出版社,1998: 1-21.

REDFIELD A C, KETCHUM B H, RICHARDS F A. The influence of organisms on the composition of seawater // HILL M N. The Sea, v.2. New York: John Wiley, 1963: 26-77.

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