Temporal fluctuations in seawater pCO2 may be as important as mean differences when determining physiological sensitivity in natural systems
Temporal fluctuations in seawater pCO2 may be as important as mean differences when determining physiological sensitivity in natural systems
复制标题
在确定自然系统的生理敏感性时,海水 pCO2 的时间波动可能与平均差异一样重要
DOI:
10.1093/icesjms/fsv232
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发表时间:
2016
影响因子:
3.3
通讯作者:
Small D
中科院分区:
文献类型:
--
作者:
Small D
Most studies assessing the impacts of ocean acidification (OA) on benthic marine invertebrates have used stable mean pH/pCO2levels to highlight variation in the physiological sensitivities in a range of taxa. However, many marine environments experience natural fluctuations in carbonate chemistry, and to date little attempt has been made to understand the effect of naturally fluctuating seawaterpCO2(pCO2sw) on the physiological capacity of organisms to maintain acid–base homeostasis. Here, for the first time, we exposed two species of sea urchin with different acid–base tolerances,Paracentrotus lividusandArbacia lixula, to naturally fluctuatingpCO2swconditions at shallow water CO2seep systems (Vulcano, Italy) and assessed their acid–base responses. Both sea urchin species experienced fluctuations in extracellular coelomic fluid pH,pCO2, and(pHe,pCO2e, and, respectively) in line with fluctuations inpCO2sw. The less tolerant species,P. lividus,had the greatest capacity forbuffering in response to acutepCO2swfluctuations, but it also experienced greater extracellular hypercapnia and acidification and was thus unable to fully compensate for acid–base disturbances. Conversely, the more tolerantA. lixularelied on non-bicarbonate protein buffering and greater respiratory control. In the light of these findings, we discuss the possible energetic consequences of increased reliance on bicarbonate buffering activity inP. lividuscompared withA. lixulaand how these differing physiological responses to acute fluctuations inpCO2swmay be as important as chronic responses to mean changes inpCO2swwhen considering how CO2emissions will affect survival and success of marine organisms within naturally assembled systems.
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DOI:
10.1016/b978-0-12-374711-2.00504-0
发表时间:
2011
期刊:
--
影响因子:
--
作者:
A. Borges;G. Abril
通讯作者:
A. Borges;G. Abril
影响因子:
2.4
作者:
John I. Spicer;Alan C. Taylor;A. Hill
通讯作者:
A. Hill
影响因子:
2.4
作者:
P. Mcelhany;D. Shallin Busch
通讯作者:
D. Shallin Busch
影响因子:
5.8
作者:
Boatta, F.;D'Alessandro, W.;Parello, F.
通讯作者:
Parello, F.
影响因子:
4.9
作者:
Andersson, A. J.;Mackenzie, F. T.
通讯作者:
Mackenzie, F. T.