Optimum growth conditions as opposed to calcite saturation as a control on the calcification rate and shell-weight of marine foraminifera
Optimum growth conditions as opposed to calcite saturation as a control on the calcification rate and shell-weight of marine foraminifera
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DOI：
10.1007/s00227-003-1183-8
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发表时间：
2004
期刊：
影响因子：
2.4
通讯作者：
S. Villiers
中科院分区：
文献类型：
--
作者：
S. Villiers
对CaCO 3生产和钙化率产生负面影响的过程，如海洋表层碳酸盐饱和状态因大气CO2水平升高而降低，可能对海洋生态系统造成灾难性后果。然而，这项研究表明，在全球范围内，南极有孔虫钙化率（从壳重推断）与方解石饱和状态无关，正如从培养实验和短纬度核心顶部样带推断的那样。相反，有孔虫钙化显然是一个功能相同的复杂的相互作用的环境参数组合丰度模式。最高的有孔虫壳重量内观察到的最佳生态位的每一个浮游生物物种，并没有简单的关系与方解石饱和度，温度或表面营养水平存在。因此，在钙化海洋生态系统中，钙化-饱和关系的影响应在比最近研究更广泛的背景下进行评估。
Processes that impact negatively on CaCO3production and calcification rates, such as a lowering of the carbonate saturation state of the surface ocean in response to higher atmospheric CO2levels, can have disastrous consequences for marine ecosystems. This study, however, shows that on a global basis planktonic foraminiferal calcification rates (as inferred from shell-weight) are not related to calcite saturation state, as has been inferred from culture experiments and across a short latitudinal core-top transect. Rather, foraminiferal calcification is apparently a function of the same complex interplay of environmental parameters as assemblage abundance patterns. Highest foraminiferal shell-weights are observed within the optimum ecological niche of each planktonic species and no simple relationship with calcite saturation, temperature or surface nutrient levels exists. The implications of calcification-saturation relationships in calcifying marine ecosystems should therefore be evaluated in a broader context than has been the case in recent studies.