气候变化领域集成服务门户(CCPortal): Effect of enhanced pCO2 levels on the production of dissolved organic carbon and transparent exopolymer particles in short-term bioassay experiments

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DOI	https://doi.org/10.1594/PANGAEA.837464
	Effect of enhanced pCO2 levels on the production of dissolved organic carbon and transparent exopolymer particles in short-term bioassay experiments
	MacGilchrist; G A; Shi; T; Tyrrell; Toby; Richier; Sophie; Moore; C M; Dumousseaud; C; Achterberg; Eric Pieter
发布日期	2014-10-28
数据集类型	dataset
英文关键词	Biomass/Abundance/Elemental composition ; Bottles or small containers/Aquaria ( 20 L) ; Coast and continental shelf ; Entire community ; Laboratory experiment ; North Atlantic ; Open ocean ; Pelagos ; Phytoplankton ; Temperate
英文简介	It has been proposed that increasing levels of pCO2 in the surface ocean will lead to more partitioning of the organic carbon fixed by marine primary production into the dissolved rather than the particulate fraction. This process may result in enhanced accumulation of dissolved organic carbon (DOC) in the surface ocean and/or concurrent accumulation of transparent exopolymer particles (TEPs), with important implications for the functioning of the marine carbon cycle. We investigated this in shipboard bioassay experiments that considered the effect of four different pCO2 scenarios (ambient, 550, 750 and 1000 µatm) on unamended natural phytoplankton communities from a range of locations in the northwest European shelf seas. The environmental settings, in terms of nutrient availability, phytoplankton community structure and growth conditions, varied considerably between locations. We did not observe any strong or consistent effect of pCO2 on DOC production. There was a significant but highly variable effect of pCO2 on the production of TEPs. In three of the five experiments, variation of TEP production between pCO2 treatments was caused by the effect of pCO2 on phytoplankton growth rather than a direct effect on TEP production. In one of the five experiments, there was evidence of enhanced TEP production at high pCO2 (twice as much production over the 96 h incubation period in the 750 matm treatment compared with the ambient treatment) independent of indirect effects, as hypothesised by previous studies. Our results suggest that the environmental setting of experiments (community structure, nutrient availability and occurrence of phytoplankton growth) is a key factor determining the TEP response to pCO2 perturbations.
空间范围	Median Latitude: 52.991959 * Median Longitude: -2.776520 * South-bound Latitude: 46.202300 * West-bound Longitude: -7.083500 * North-bound Latitude: 56.787830 * East-bound Longitude: 3.158500
时间范围	2011-06-08T02:00:00 - 2011-07-02T02:00:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/217301
推荐引用方式 GB/T 7714	MacGilchrist,G A,Shi,et al. Effect of enhanced pCO2 levels on the production of dissolved organic carbon and transparent exopolymer particles in short-term bioassay experiments.2014-10-28.https://doi.org/10.1594/PANGAEA.837464.