Environmental drivers of coccolithophore abundance and calcification across Drake Passage (Southern Ocean)
Environmental drivers of coccolithophore abundance and calcification across Drake Passage (Southern Ocean)
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DOI：
10.5194/bg-13-5917-2016
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发表时间：
2016-11
期刊：
影响因子：
4.9
通讯作者：
A. Charalampopoulou;A. Poulton;D. Bakker;M. Lucas;M. Stinchcombe;T. Tyrrell
中科院分区：
文献类型：
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作者：
A. Charalampopoulou;A. Poulton;D. Bakker;M. Lucas;M. Stinchcombe;T. Tyrrell
抽象的。虽然在南大洋的球虫数量和种类不像在北大西洋的亚极地水域那样常见或多样，但在夏季的几个月里发现了一些物种，如埃米利亚尼亚石虫。事实上，人们对这些群落的方解石产量(CP)以及它们的分布和生理与该地区的环境变量之间的关系知之甚少。2009年2月，我们在德雷克海峡(南美洲和南极半岛之间)对球藻生物体的分布、CP、初级生产力、叶绿素a和常量营养素浓度、辐射和碳酸盐化学进行了观测。虽然CP只占总固碳量的不到1%，但球藻生物体在德雷克海峡广泛存在。湖北棘球藻的B/C型是主要的球石生物体，从生物测量中对球石方解石的估计很低(∼0.01pmolC球石−1)。细胞正常化钙化(0.01-0.16pmolC细胞−1d−1)和总CP(
Abstract. Although coccolithophores are not as numerically common or as diverse in the Southern Ocean as they are in subpolar waters of the North Atlantic, a few species, such as Emiliania huxleyi, are found during the summer months. Little is actually known about the calcite production (CP) of these communities or how their distribution and physiology relate to environmental variables in this region. In February 2009, we made observations across Drake Passage (between South America and the Antarctic Peninsula) of coccolithophore distribution, CP, primary production, chlorophyll a and macronutrient concentrations, irradiance and carbonate chemistry. Although CP represented less than 1 % of total carbon fixation, coccolithophores were widespread across Drake Passage. The B/C morphotype of E. huxleyi was the dominant coccolithophore, with low estimates of coccolith calcite (∼ 0.01 pmol C coccolith−1) from biometric measurements. Both cell-normalised calcification (0.01–0.16 pmol C cell−1 d−1) and total CP (