Global patterns in oceanic planktonic metabolism
Global patterns in oceanic planktonic metabolism
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DOI：
10.4319/lo.2013.58.3.0977
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发表时间：
2013-05-01
影响因子：
4.5
通讯作者：
Duarte, Carlos M.
中科院分区：
文献类型：
--
作者：
Regaudie-de-Gioux, Aurore;Duarte, Carlos M.
根据3149对真光层浮游生物群落GPP-CR容积的明暗瓶测量数据，对上层海洋浮游生物群落的GPP和CR进行了评价。这些数据来自1981年至2011年期间在公海和地中海进行的72份已发表和未发表的测量报告。该数据集主要由叶绿素a丰富的海洋和北大西洋沃茨的测量数据组成，印度洋和南太平洋的测量数据很少。CR为GPP的3/4次方，幂斜率为0.79 +/- 0.01，这意味着区分异养和自养浮游生物群落的阈值GPP为1.26 mmol O-2 m（-3）d（-1）。叶绿素a <0.35mg·m ~（-3）的浮游生物群落趋于异养。GPP和CR均随深度呈指数下降，但GPP下降速度（42% +/- 7% m（-1））快于CR（29% +/- 8% m（-1）），因此CR相对于GPP随深度增加。
Rates of gross primary production (GPP) and respiration (CR) of plankton communities in the upper ocean were evaluated on the basis of a data set comprising 3149 paired light and dark bottle measurements of volumetric GPP-CR of euphotic zone plankton communities. The data were from 72 published and unpublished reports of measurements made between 1981 and 2011 from the open ocean and the Mediterranean Sea. The data set is dominated by measurements in chlorophyll a (Chl a)-rich oceans and North Atlantic waters, with a paucity of measurements in the Indian Ocean and South Pacific Ocean. CR scaled as the 3/4 power of GPP with a power slope of 0.79 +/- 0.01, implying that the threshold GPP separating heterotrophic from autotrophic plankton communities is 1.26 mmol O-2 m(-3) d(-1). Plankton communities with Chl a < 0.35 mg m(-3) tend to be heterotrophic. Both GPP and CR declined exponentially with depth, but the GPP declined faster, at 42% +/- 7% m(-1), than CR (29% +/- 8% m(-1)), so that CR increases relative to GPP with depth.