A marine secondary producer respires and feeds more in a high CO2 ocean

Climate change mediates marine chemical and physical environments and therefore influences marine organisms. While increasing atmospheric CO2 level and associated ocean acidification has been predicted to stimulate marine primary productivity and may affect community structure, the processes that im...

Full description

Bibliographic Details
Published in:Marine Pollution Bulletin
Main Authors: Li, Wei, Gao, Kunshan, 高昆山
Format: Article in Journal/Newspaper
Language:English
Published: PERGAMON-ELSEVIER SCIENCE LTD 2012
Subjects:
Behavior
Centropages tenuiremis
Copepod
Feeding
Ocean acidification
Respiration
Copepods
Online Access:https://doi.org/10.1016/j.marpolbul.2012.01.033
http://dspace.xmu.edu.cn/handle/2288/15596
Description
Summary:Climate change mediates marine chemical and physical environments and therefore influences marine organisms. While increasing atmospheric CO2 level and associated ocean acidification has been predicted to stimulate marine primary productivity and may affect community structure, the processes that impact food chain and biological CO2 pump are less documented. We hypothesized that copepods, as the secondary marine producer, may respond to future changes in seawater carbonate chemistry associated with ocean acidification due to increasing atmospheric CO2 concentration. Here, we show that the copepod. Centropages tenuiremis, was able to perceive the chemical changes in seawater induced under elevated CO2 concentration (>1700 mu atm, pH < 7.60) with avoidance strategy. The copepod's respiration increased at the elevated CO2 (1000 mu atm), associated acidity (pH 7.83) and its feeding rates also increased correspondingly, except for the initial acclimating period, when it fed less. Our results imply that marine secondary producers increase their respiration and feeding rate in response to ocean acidification to balance the energy cost against increased acidity and CO2 concentration. (C) 2012 Elsevier Ltd. All rights reserved. National Basic Research Program of China [2009CB421207]; National Natural Science Foundation of China [40930846, 41120164007]; program for Changjiang Scholars and Innovative Research Team [IRT0941]; MOST [S2012GR0290]

Similar Items