The bacterial abundance and production in the East China Sea: seasonal variations and relationships with the phytoplankton biomass and production

CHEN Bingzhang; HUANG Bangqin; XIE Yuyuan; GUO Cui; SONG Shuqun; LI Hongbo; LIU Hongbin

doi:10.1007/s13131-014-0528-0

东海细菌丰度和生产力的季节变化及与浮游植物生物量和生产力的关系

doi: 10.1007/s13131-014-0528-0

1.
福建省海陆界面生态环境重点实验室、厦门大学近海海洋环境科学国家重点实验室, 福建厦门 361102
2.
香港科技大学生命科学学部, 香港九龙清水湾
3.
中国科学院海洋生态与环境科学重点实验室, 山东青岛 266071
4.
国家海洋局环境监测中心, 大连辽宁 116023

基金项目: The National Basic Research Program (973 Program) of China through Grant under contract No. 2009CB421203; the Fundamental Research Funds for the Central Universities of Xiamen University of China under contract Nos 2011121007 and 2012121058; the State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences of China under contract No. LTO1103; the Hong Kong Research Grant Council General Research Fund under contract Nos 661809, 661610 and 661911; the National Natural Science Foundation of China under contract Nos 40906082, 41176112 and 41330961; the Public Science and Technology Research Funds Projects of Ocean under contract No. 201005015-5.

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- 收稿日期: 2013-02-07
- 修回日期: 2013-05-20

The bacterial abundance and production in the East China Sea: seasonal variations and relationships with the phytoplankton biomass and production

1.
Fujian Provincial Joint Key Laboratory of Coastal Ecology and Environmental Studies and State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China
2.
Division of Life Science, Hong Kong University of Science and Technology, Hong Kong, China
3.
Key Laboratory of Marine Ecology and Environmental Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
4.
National Marine Environmental Monitoring Center, State Oceanic Administration, Dalian 116023, China

摘要

摘要: 东海是一个具有较宽大陆架、生产力较高的边缘海，在吸收大气二氧化碳和将陆源有机物传输到开阔大洋的生物地球化学循环中起重要作用。为研究异养细菌在东海生物地球化学循环中的作用，我们在4个航次中测定了细菌生物量和生产力。细菌生物量和生产力的水平分布具有显著的季节特征。受长江径流影响，在2009年8月航次细菌生物量和生产力在近岸陆架（水深不超过50m）水体中较高，并向离岸逐步降低。在2009年12月－2010年1月与2010年11-12月的航次中，细菌生物量和生产力在中等水深的水体中较高。从近岸向离岸逐步降低的趋势在2011年5月的航次中也观察到。在此航次中，细菌生物量在陆架坡折处（水深深于50米但浅于200米）显著高于其他航次。广义相加模型结果显示细菌生物量在8-20度范围内随温度升高而升高，在0.02-3.00 mg/m³范围内随叶绿素浓度上升而上升，而当叶绿素浓度再上升时则下降。细菌生物量在盐度28-35范围内随盐度上升而下降。细菌生长率（取对数后）与温度的关系为线性。所估算的细菌生长率的温度系数（Q₁₀）与浮游植物生长率的相接近。细菌生长率也随叶绿素浓度升高而升高。细菌生产力与浮游植物初级生产的比例范围为0.01-0.4，并在2010年11-12月航次中显著高于2011年5-6月。由细菌生产力和生长效率计算所得，在2009年8月、2010年11-12月、2011年5-6月三个航次中59%、72%和23%的浮游植物初级生产力分别被细菌呼吸所消耗。
- 细菌生产力 /
- 广义相加模型 /
- 叶绿素 /
- 温度 /
- 东海
Abstract: The East China Sea is a productive marginal sea with a wide continental shelf and plays an important role in absorbing atmospheric carbon dioxide and transferring terrigenous organic matter to the open ocean. To investigate the roles of heterotrophic bacteria in the biogeochemical dynamics in the East China Sea, bacterial biomasses (BB) and productions (BP) were measured in four cruises. The spatial distributions of the BB and the BP were highly season-dependent. Affected by the Changjiang River discharge, the BB and the BP were high in shelf waters (bottom depth not deeper than 50 m) and generally decreased offshore in August 2009. In December 2009 to January 2010, and November to December 2010, the BB and the BP were high in waters with medium bottom depth. The onshore-offshore decreasing trends of the BB and the BP also existed in May-June 2011, when the BB was significantly higher than in other cruises in shelf break waters (bottom depth deeper than 50 m but not deeper than 200 m). The results of generalized additive models (GAM) suggest that the BB increased with the temperature at a range of 8-20℃, increased with the chlorophyll concentration at a range of 0.02-3.00 mg/m³ and then declining, and decreased with the salinity from 28 to 35. The relationship between the temperature and the log-transformed bacterial specific growth rate (SGR) was linear. The estimated temperature coefficient (Q₁₀) of the SGR was similar with that of the phytoplankton growth. The SGR also increased with the chlorophyll concentration. The ratio of the bacterial to phytoplankton production ranged from less than 0.01 to 0.40, being significantly higher in November-December 2010 than in May-June 2011. Calculated from the bacterial production and growth efficiency, the bacterial respiration consumed, on average, 59%, 72% and 23% of the primary production in August 2009, November-December 2010, and May-June 2011, respectively.
- bacterial production /
- generalized additive model /
- chlorophyll /
- temperature /
- East China Sea

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东海细菌丰度和生产力的季节变化及与浮游植物生物量和生产力的关系

doi: 10.1007/s13131-014-0528-0

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The bacterial abundance and production in the East China Sea: seasonal variations and relationships with the phytoplankton biomass and production

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