气候变化领域集成服务门户(CCPortal): Experiment on the influence of temperature, N:P supply ratio and pCO2 on elemental composition and growth rates of Emiliania huxleyi

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.887513
	Experiment on the influence of temperature, N:P supply ratio and pCO2 on elemental composition and growth rates of Emiliania huxleyi
	Bi; Rong; Ismar; Stefanie M; Sommer; Ulrich; Zhao; Meixun
发布日期	2018-03-21
数据集类型	dataset
英文简介	Climate-driven changes in environmental conditions have significant and complex effects on marine ecosystems. Variability in phytoplankton elements and biochemicals can be important for global ocean biogeochemistry and ecological functions, while there is currently limited understanding on how elements and biochemicals respond to the changing environments in key coccolithophore species such as Emiliania huxleyi. We investigated responses of elemental stoichiometry and fatty acids (FAs) in a strain of E. huxleyi under three temperatures (12, 18 and 24 oC), three N:P supply ratios (molar ratios 10:1, 24:1 and 63:1) and two pCO2 levels (560 and 2400 µatm). Overall, C:N:P stoichiometry showed the most pronounced response to N:P supply ratios, with high ratios of particulate organic carbon vs. particulate organic nitrogen (POC:PON) and low ratios of PON vs. particulate organic phosphorus (PON:POP) in low N-media, and high POC:POP and PON:POP in low P-media. The ratio of particulate inorganic carbon vs. POC (PIC:POC) and polyunsaturated fatty acid proportions strongly responded to temperature and pCO2, both being lower under high pCO2 and higher with warming. We observed synergistic interactions between warming and nutrient deficiency (and high pCO2) on elemental cellular contents and docosahexaenoic acid (DHA) proportion in most cases, indicating the enhanced effect of warming under nutrient deficiency (and high pCO2). Our results suggest differential sensitivity of elements and FAs to the changes in temperature, nutrient availability and pCO2 in E. huxleyi, which is to some extent unique compared to non-calcifying algal classes. Thus, simultaneous changes of elements and FAs should be considered when predicting future roles of E. huxleyi in the biotic-mediated connection between biogeochemical cycles, ecological functions and climate change.
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/216279
推荐引用方式 GB/T 7714	Bi,Rong,Ismar,et al. Experiment on the influence of temperature, N:P supply ratio and pCO2 on elemental composition and growth rates of Emiliania huxleyi.2018-03-21.https://doi.org/10.1594/PANGAEA.887513.