| 南海北部冬、夏季浮游群落呼吸率 |
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| 引用本文： | 曾祥茜,郝锵,周光东,乐凤凤,刘诚刚,周文礼.南海北部冬、夏季浮游群落呼吸率[J].海洋学报(英文版),2018,37(8):74-83. |
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| 作者姓名： | 曾祥茜 郝锵 周光东 乐凤凤 刘诚刚 周文礼 |
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| 作者单位： | 国家海洋局 第二海洋研究所 海洋生态系统与生物地球化学重点实验室, 浙江 杭州 310012;天津渤海水产研究所 天津市海洋牧场技术工程中心, 天津 300457;天津农学院 水产学院, 天津 300384,国家海洋局 第二海洋研究所 海洋生态系统与生物地球化学重点实验室, 浙江 杭州 310012;卫星海洋环境动力学国家重点实验室, 浙江 杭州 310012,国家海洋局 第二海洋研究所 海洋生态系统与生物地球化学重点实验室, 浙江 杭州 310012,国家海洋局 第二海洋研究所 海洋生态系统与生物地球化学重点实验室, 浙江 杭州 310012,国家海洋局 第二海洋研究所 海洋生态系统与生物地球化学重点实验室, 浙江 杭州 310012;卫星海洋环境动力学国家重点实验室, 浙江 杭州 310012,天津农学院 水产学院, 天津 300384 |
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| 基金项目： | The National Natural Science Foundation of China (NSFC) under contract Nos 90711006, 41306162 and 41006101; the National Key Research and Development Program of China under contract No. 2016YFC1401601; the National Programme on Global Change and Air-Sea Interaction under contract No. GASI-0301-03-03. |
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| 摘 要： | Plankton respiration is an important part of the carbon cycle and significantly affects the balance of autotrophic assimilation and heterotrophic production in oceanic ecosystems. In the present study, respiration rates of the euphotic zone plankton community(CR_(eu)), size fractionated chlorophyll a concentration(Chl a), bacterial abundance(BAC), and dissolved oxygen concentration(DO) were investigated during winter and summer in the northern South China Sea(n SCS). The results show that there were obvious spatial and temporal variations in CR_(eu) in the n SCS(ranging from 0.03 to 1.10 μmol/(L·h)), CR_(eu) in winter((0.53±0.27) μmol/(L·h)) was two times higher than that in summer((0.26±0.20) μmol/(L·h)), and decreased gradually from the coastal zone to the open sea. The distribution of CR_(eu) was affected by coupled physical-chemical-biological processes, driven by monsoon events. The results also show that CR_(eu) was positively correlated with Chl a, BAC, and DO, and that BAC contributed the highest CR_(eu) variability. Furthermore, the results of the stepwise multiple linear regression suggest that bacteria and phytoplankton were the dominant factors in determining CR_(eu)(R~2 = 0.82, p0.05) in the n SCS. Based on this relationship, we estimated the integrated water column respiration rate(CRint) within 100 m of the investigated area, and found that the relationship between the biomass of the plankton community and respiration may be nonlinear in the water column.
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| 关 键 词： | 南海北部 浮游群落 呼吸率 浮游植物 细菌 |
| 收稿时间： | 2017/1/21 0:00:00 |
| 修稿时间： | 2017/7/18 0:00:00 |
Plankton respiration in the northern South China Sea during summer and winter |
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| ZENG Xiangxi,HAO Qiang,ZHOU Guangdong,LE Fengfeng,LIU Chenggang and ZHOU Wenli.Plankton respiration in the northern South China Sea during summer and winter[J].Acta Oceanologica Sinica,2018,37(8):74-83. |
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| Authors: | ZENG Xiangxi HAO Qiang ZHOU Guangdong LE Fengfeng LIU Chenggang and ZHOU Wenli |
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| Institution: | 1.Key Laboratory of Marine Ecosystem and Biogeochemistry,Second Institute of Oceanography, State Oceanic Administration,Hangzhou,China;2.Center for Marine Ranching Engineering Science Research of Tianjin,Tianjin Bohai Sea Fisheries Research Institute,Tianjin,China;3.State Key Laboratory of Satellite Ocean Environment Dynamics,Hangzhou,China;4.Tianjin Key Laboratory of Aqua-ecology and Aquaculture, College of Fisheries,Tianjin Agricultural University,Tianjin,China |
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| Abstract: | Plankton respiration is an important part of the carbon cycle and significantly affects the balance of autotrophic assimilation and heterotrophic production in oceanic ecosystems. In the present study, respiration rates of the euphotic zone plankton community (CReu), size fractionated chlorophyll a concentration (Chl a), bacterial abundance (BAC), and dissolved oxygen concentration (DO) were investigated during winter and summer in the northern South China Sea (nSCS). The results show that there were obvious spatial and temporal variations in CReu in the nSCS (ranging from 0.03 to 1.10 µmol/(L·h)), CReu in winter ((0.53±0.27) µmol/(L·h)) was two times higher than that in summer ((0.26±0.20) µmol/(L·h)), and decreased gradually from the coastal zone to the open sea. The distribution of CReu was affected by coupled physical-chemical-biological processes, driven by monsoon events. The results also show that CReu was positively correlated with Chl a, BAC, and DO,and that BAC contributed the highest CReu variability. Furthermore, the results of the stepwise multiple linear regression suggest that bacteria and phytoplankton were the dominant factors in determining CReu (R2 = 0.82, p<0.05) in the nSCS. Based on this relationship, we estimated the integrated water column respiration rate (CRint) within 100 m of the investigated area, and found that the relationship between the biomass of the plankton community and respiration may be nonlinear in the water column. |
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| Keywords: | northern South China Sea plankton community respiration phytoplankton bacteria |
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