Contribution of bacterial respiration to plankton respiration from 50°N to 44°S in the Atlantic Ocean
Contribution of bacterial respiration to plankton respiration from 50°N to 44°S in the Atlantic Ocean
复制标题
大西洋 50°N 至 44°S 细菌呼吸对浮游生物呼吸的贡献
DOI：
10.1016/j.pocean.2016.11.006
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发表时间：
2017
影响因子：
4.1
通讯作者：
García-Martín E
中科院分区：
文献类型：
--
作者：
García-Martín E
海洋细菌在全球碳循环中发挥着重要作用，因此在气候调节中也发挥着重要作用。然而，直接测量的缺乏意味着我们对海洋中细菌呼吸的大小和变化的了解很差。在大西洋沿着两个纬度样带（约1000 m）上，对0.2-0.8 μm粒级的呼吸（被认为是细菌呼吸）、浮游生物群落总呼吸以及细菌呼吸对浮游生物群落总呼吸的贡献进行了估算。50°N-44°S）。采用了两种不同的方法：测定标准24 h暗瓶孵育后溶解O2浓度的变化，以及测量2-（对碘苯基）-3-（对硝基苯基）-5苯基四唑盐（INT）的体内还原。两种方法估算的群落呼吸速率总体上呈显著相关（r= 0.44，p <0.0001，n = 90）。深度综合群落呼吸变化多达三倍区域之间。最大发生率在沃茨的西欧大陆架和巴塔哥尼亚大陆架，最低利率在北部和南部寡营养环流。深度综合细菌呼吸遵循相同的模式作为社区呼吸。北方亚热带环流中的细菌呼吸作用显著高于南方亚热带环流，表明北方亚热带环流中的细菌碳周转更快。不同年份浮游生物呼吸与理化和生物学指标的关系不同。总的来说，INTT与叶绿素a和细菌丰度均相关，而INT0.2- 0.8只与细菌丰度相关。2010年INTT和INT 0. 2 - 0. 8与温度和初级生产力相关，2011年与硝酸盐+亚硝酸盐浓度相关。细菌对深度综合群落呼吸的贡献在各省之间差异很大（4-77%）。从这项研究的结果表明，总的社区呼吸的比例归因于细菌之间的6个海洋区域的研究是相似的。
Marine bacteria play an important role in the global cycling of carbon and therefore in climate regulation. However, the paucity of direct measurements means that our understanding of the magnitude and variability of bacterial respiration in the ocean is poor. Estimations of respiration in the 0.2–0.8 μm size-fraction (considered as bacterial respiration), total plankton community respiration, and the contribution of bacterial respiration to total plankton community respiration were made along two latitudinal transects in the Atlantic Ocean (ca. 50°N–44°S) during 2010 and 2011. Two different methodologies were used: determination of changes in dissolved O2concentration after standard 24 h dark bottle incubations, and measurements of in vivo reduction of 2-(ρ-iodophenyl)-3-(ρ-nitrophenyl)-5phenyl tetrazolium salt (INT). There was an overall significant correlation (r= 0.44,p< 0.0001,n= 90) between the rates of community respiration estimated by both methods. Depth-integrated community respiration varied as much as threefold between regions. Maximum rates occurred in waters of the western European shelf and Patagonian shelf, and minimum rates in the North and South oligotrophic gyres. Depth-integrated bacterial respiration followed the same pattern as community respiration. There was a significantly higher cell-specific bacterial respiration in the northern subtropical gyre than in the southern subtropical gyre which suggests that bacterial carbon turnover is faster in the northern gyre. The relationships between plankton respiration and physicochemical and biological variables were different in different years. In general, INTTwas correlated to both chlorophyll-aand bacterial abundance, while INT0.2–0.8was only correlated with bacterial abundance. However, in 2010 INTTand INT0.2–0.8were also correlated with temperature and primary production while in 2011 they were correlated with nitrate + nitrite concentration. The bacterial contribution to depth integrated community respiration was highly variable within provinces (4–77%). Results from this study suggest that the proportion of total community respiration attributable to bacteria is similar between the 6 oceanographic regions studied.
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DOI：
10.1016/j.dsr.2014.06.007
发表时间：
2014-10
期刊：
--
影响因子：
--
作者：
E. E. García‐Martín-E.;P. Serret;Raymond J. G. Leakey
通讯作者：
E. E. García‐Martín-E.;P. Serret;Raymond J. G. Leakey
影响因子：
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作者：
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通讯作者：
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DOI：
--
发表时间：
1995
期刊：
影响因子：
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作者：
M. Weinbauer;P. Peduzzi
通讯作者：
P. Peduzzi
DOI：
--
发表时间：
1999
期刊：
影响因子：
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作者：
P. Serret;E. Fernández;Jorge A. Sostres;R. Anadón
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热带和亚热带太平洋表层水中浮游生物的代谢
影响因子：
1.4
作者：
D. A. Viviani;K. Björkman;D. Karl;M. Church
通讯作者：
M. Church