Coccolithophore calcification response to past ocean acidification and climate change.
Coccolithophore calcification response to past ocean acidification and climate change.
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DOI：
10.1038/ncomms6363
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发表时间：
2014-11-17
影响因子：
16.6
通讯作者：
Wilson, Paul A.
中科院分区：
文献类型：
--
作者：
O'Dea, Sarah A.;Gibbs, Samantha J.;Bown, Paul R.;Young, Jeremy R.;Poulton, Alex J.;Newsam, Cherry;Wilson, Paul A.
人为二氧化碳排放迫使海洋化学发生迅速变化，造成海洋酸化，这对钙化生物，包括浮游颗石藻，具有特别重要的意义。通过对颗石藻骨骼的详细分析，可以比较现代细胞和化石细胞中方解石的产生，从而研究古代颗石藻对气候变化的生物矿化响应。在这里，我们表明，两个占主导地位的颗石藻类群在古新世-始新世最大热（PETM）OA全球变暖事件（约5600万年前）表现出形态的环境变化的反应，都表现出钙化率降低。然而，只有Coccolithus pelagicus表现出短暂的变薄的coccoliths，就在PETM，这可能是OA诱导。改变颗石厚度可能会影响方解石生产更显着的优势现代物种Emiliania huxleyi，但总体而言，这些PETM记录表明，环境因素，管理分类组成和增长率将最强烈地影响颗石钙化响应人为变化。 钙化生物，如浮游颗石藻，可能特别容易受到海洋酸化加剧的影响。在这里，O 'Dea等人表明，在5600万年前的全球变暖酸化事件中，两种化石颗石藻物种表现出钙化率降低。
Anthropogenic carbon dioxide emissions are forcing rapid ocean chemistry changes and causing ocean acidification (OA), which is of particular significance for calcifying organisms, including planktonic coccolithophores. Detailed analysis of coccolithophore skeletons enables comparison of calcite production in modern and fossil cells in order to investigate biomineralization response of ancient coccolithophores to climate change. Here we show that the two dominant coccolithophore taxa across the Paleocene–Eocene Thermal Maximum (PETM) OA global warming event (~56 million years ago) exhibited morphological response to environmental change and both showed reduced calcification rates. However, only Coccolithus pelagicus exhibits a transient thinning of coccoliths, immediately before the PETM, that may have been OA-induced. Changing coccolith thickness may affect calcite production more significantly in the dominant modern species Emiliania huxleyi, but, overall, these PETM records indicate that the environmental factors that govern taxonomic composition and growth rate will most strongly influence coccolithophore calcification response to anthropogenic change. Calcifying organisms such as planktonic coccolithophores may be particularly vulnerable to increased ocean acidification. Here, O’Dea et al. show that two fossil coccolithophore species exhibited reduced calcification rates during a global warming acidification event 56 million years ago.
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影响因子：
18.3
作者：
Ridgwell, Andy;Schmidt, Daniela N.
通讯作者：
Schmidt, Daniela N.
影响因子：
1.5
作者：
Beaufort, L
通讯作者：
Beaufort, L
DOI：
10.1073/pnas.1132069100
发表时间：
2003-06-10
影响因子：
11.1
作者：
Sáez, AG;Probert, I;Medlin, LK
通讯作者：
Medlin, LK
影响因子：
2.3
作者：
Nicholas, Christopher J.;Pearson, Paul N.;Wade, Bridget S.
通讯作者：
Wade, Bridget S.
影响因子：
4.9
作者：
Ridgwell, A.;Schmidt, D. N.;Young, J. R.
通讯作者：
Young, J. R.