气候变化领域集成服务门户(CCPortal): Experiment on E. huxleyi strains in the Azores, Bergen and Canary Islands populations to CO2 ranges from 115 μatm to 3070 μatm

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.893100
	Experiment on E. huxleyi strains in the Azores, Bergen and Canary Islands populations to CO2 ranges from 115 μatm to 3070 μatm
	Zhang; Yong; Bach; Lennart Thomas; Lohbeck; Kai T; Schulz; Kai Georg; Listmann; Luisa; Klapper; Regina; Riebesell; Ulf
发布日期	2018-08-16
数据集类型	dataset
英文简介	Although coccolithophore physiological responses to CO2-induced changes in seawater carbonate chemistry have been widely studied in the past, there is limited knowledge on the variability of physiological responses between populations from different areas. In the present study, we investigated the specific responses of growth, particulate organic (POC) and inorganic carbon (PIC) production rates of three populations of the coccolithophore Emiliania huxleyi from three regions in the North Atlantic Ocean (Azores: six strains, Canary Islands: five strains, and Norwegian coast near Bergen: six strains) to a CO2 partial pressure (pCO2) range from 120 to 2630µatm. Physiological rates of each population and individual strain increased with rising pCO2 levels, reached a maximum and declined thereafter. Optimal pCO2 for growth, POC production rates, and tolerance to low pH (i.e., high proton concentration) was significantly higher in an E. huxleyi population isolated from the Norwegian coast than in those isolated near the Azores and Canary Islands. This may be due to the large environmental variability including large pCO2 and pH fluctuations in coastal waters off Bergen compared to the rather stable oceanic conditions at the other two sites. Maximum growth and POC production rates of the Azores and Bergen populations were similar and significantly higher than that of the Canary Islands population. This pattern could be driven by temperature–CO2 interactions where the chosen incubation temperature (16°C) was slightly below what strains isolated near the Canary Islands normally experience. Our results indicate adaptation of E. huxleyi to their local environmental conditions and the existence of distinct E. huxleyi populations. Within each population, different growth, POC, and PIC production rates at different pCO2 levels indicated strain-specific phenotypic plasticity. Accounting for this variability is important to understand how or whether E. huxleyi might adapt to rising CO2 levels.
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/215218
推荐引用方式 GB/T 7714	Zhang,Yong,Bach,et al. Experiment on E. huxleyi strains in the Azores, Bergen and Canary Islands populations to CO2 ranges from 115 μatm to 3070 μatm.2018-08-16.https://doi.org/10.1594/PANGAEA.893100.