Marine Pollution Bulletin, April 2012, Vol.64(4), pp.699-703
► could show avoidance behavior when exposure to lower pH. ► Respiration rates were enhanced under high CO (1000 μatm) condition. ► Feeding rates increased with prolonged exposure under the high CO condition. Climate change mediates marine chemical and physical environments and therefore influences marine organisms. While increasing atmospheric CO 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 CO 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 CO concentration. Here, we show that the copepod, , was able to perceive the chemical changes in seawater induced under elevated CO concentration (〉1700 μatm, pH 〈 7.60) with avoidance strategy. The copepod’s respiration increased at the elevated CO (1000 μatm), 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 CO concentration.
Behavior ; Centropages Tenuiremis ; Copepod ; Feeding ; Ocean Acidification ; Respiration ; Environmental Sciences ; Oceanography
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