British Antarctic Survey, Natural Environmental Research Council, Cambridge, UK.
Istituto di Scienze Marine, Consiglio Nazionale delle Ricerche, Naples, Italy.
Mar Environ Res. 2019 Jan;143:39-48. doi: 10.1016/j.marenvres.2018.11.003. Epub 2018 Nov 9.
Natural gradients of pH in the ocean are useful analogues for studying the projected impacts of Ocean Acidification (OA) on marine ecosystems. Here we document the in situ impact of submarine CO volcanic emissions (CO vents) on live shelled-pteropods (planktonic gastropods) species Creseis conica in the Gulf of Naples (Tyrrhenian Sea, Mediterranean). Since the currents inside the Gulf will likely drive those pelagic calcifying organisms into and out of the CO vent zones, we assume that pteropods will be occasionally exposed to the vents during their life cycle. Shell degradation and biomass were investigated in the stations located within and nearby the CO vent emission in relation to the variability of sea water carbonate chemistry. A relative decrease in shell biomass (22%), increase in incidence of shell fractures (38%) and extent of dissolution were observed in Creseis conica collected in the Gulf of Naples compared to those from the Northern Tyrrhenian Sea (control stations). These results suggest that discontinuous but recurrent exposure to highly variable carbonate chemistry could consistently affect the characteristic of the pteropod shells.
海洋中 pH 值的自然梯度是研究海洋酸化（OA）对海洋生态系统预计影响的有用模拟物。在这里，我们记录了海底 CO2 火山喷发（CO 喷口）对那不勒斯湾（第勒尼安海，地中海）生活有壳翼足目动物（浮游腹足纲动物） Creseis conica 的现场影响。由于海湾内的海流可能会将那些浮游钙化生物带入和带出 CO 喷口区域，因此我们假设翼足目动物在其生命周期中偶尔会暴露在喷口处。在与海水碳酸盐化学变化相关的 CO 喷口排放的站内和附近的站中，研究了贝壳降解和生物量。与来自第勒尼安海北部（对照站）的样本相比，在那不勒斯湾收集的 Creseis conica 中，贝壳生物量相对减少（22%），贝壳破裂发生率增加（38%），溶解程度增加。这些结果表明，不连续但反复暴露于高度变化的碳酸盐化学环境可能会持续影响翼足类贝壳的特征。
