Calcification of planktonic foraminifer Neogloboquadrina pachyderma (sinistral) controlled by seawater temperature rather than ocean acidification in the Antarctic Zone of modern Sothern Ocean
Calcification of planktonic foraminifer Neogloboquadrina pachyderma (sinistral) controlled by seawater temperature rather than ocean acidification in the Antarctic Zone of modern Sothern Ocean
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DOI：
10.1007/s11430-021-9924-7
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发表时间：
2022-08
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影响因子：
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通讯作者：
Qianwei Song;Bingbin Qin;Zheng Tang;Yanguang Liu;Zhihua Chen;Jingteng Guo;Z. Xiong;Tiegang Li
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文献类型：
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作者：
Qianwei Song;Bingbin Qin;Zheng Tang;Yanguang Liu;Zhihua Chen;Jingteng Guo;Z. Xiong;Tiegang Li
新浮游有孔虫是中高纬度海洋中的优势浮游有孔虫，是当地碳酸钙产量的主要组成部分。然而，支配该物种钙化及其对未来海洋环境变化的潜在反应的主导因素却知之甚少。本研究利用一种改进的清洁法测量大小归一化重量(SNW)来估计N的SNW。厚皮病(Pachyderma(Sin.)在南大洋南极地带的阿蒙森海、罗斯海和普里兹湾的表层沉积物中。结果表明，SNW of n.厚皮病(Pachyderma(Sin.)不受死后深水碳酸盐溶解控制，因此，可以用来反映钙化程度。比较了……。厚皮病(Pachyderma(Sin.)SNW和环境参数(温度、盐度、营养物质浓度和碳酸盐体系)揭示了钙化深度的N。厚皮病(Pachyderma(Sin.)200-250、250-300和300-355µm范围内的SNW与海水温度呈显著正相关。此外，温度每升高一度，SNW将增加∼30%，从而表明N的钙化。厚皮病(Pachyderma(Sin.)在现代南大洋南极地带，气候变化主要受温度控制，而不是受海洋酸化等其他环境参数的影响。重要的是，n的钙化的潜在增加。厚皮病(Pachyderma(Sin.)在南极地带产生的CaCO3会将二氧化碳释放到大气中。反过来，未来的海洋变暖将削弱海洋的碳汇，从而为全球变暖产生积极的反馈。
Neogloboquadrina pachyderma(sinistral), the dominant planktonic foraminiferal species in the mid-to-high latitude oceans, represents a major component of local calcium carbonate (CaCO3) production. However, the predominant factors, governing the calcification of this species and its potential response to the future marine environmental changes, are poorly understood. The present study utilized an improved cleaning method for the size-normalized weight (SNW) measurement to estimate the SNW ofN. pachyderma(sin.) in surface sediments from the Amundsen Sea, the Ross Sea, and the Prydz Bay in the Antarctic Zone of the Southern Ocean. It was found that SNW ofN. pachyderma(sin.) is not controlled by deep-water carbonate dissolution post-mortem, and can be therefore, used to reflect the degree of calcification. The comparison betweenN. pachyderma(sin.) SNW and environmental parameters (temperature, salinity, nutrient concentration, and carbonate system) in the calcification depth revealed thatN. pachyderma(sin.) SNWs in the size ranges of 200–250, 250–300, and 300–355 µm are significantly and positively correlated with seawater temperature. Moreover, SNW would increase by ∼30% per degree increase in temperature, thereby suggesting that the calcification ofN. pachyderma(sin.) in the modern Antarctic Zone of the Southern Ocean is mainly controlled by temperature, rather than by other environmental parameters such as ocean acidification. Importantly, a potential increase in calcification ofN. pachyderma(sin.) in the Antarctic Zone to produce CaCO3will release CO2into the atmosphere. In turn, the future ocean warming will weaken the ocean carbon sink, thereby generating positive feedback for global warming.