气候变化领域集成服务门户(CCPortal): Resistance of an Arctic phytoplankton assemblages to ocean acidification and high irradiance, link to supplement in MS Excel format

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DOI	https://doi.org/10.1594/PANGAEA.878255
	Resistance of an Arctic phytoplankton assemblages to ocean acidification and high irradiance, link to supplement in MS Excel format
	Hoppe; Clara Jule Marie; Schuback; Nina; Semeniuk; David M; Giesbrecht; Karina; Mol; Jacoba; Thomas; Helmuth; Maldonado; Maria T; Rost; Björn; Varela; Diana E; Tortell; Philippe Daniel
发布日期	2017-07-26
数据集类型	dataset
英文简介	The Arctic Ocean is a region particularly prone to on-going ocean acidification (OA) and climate-driven changes. The influence of these changes on Arctic phytoplankton assemblages, however, remains poorly understood. In order to understand how OA and enhanced irradiances (e.g. resulting from sea-ice retreat) will alter the species composition, primary production and ecophysiology of Arctic phytoplankton, we conducted an incubation experiment to investigate the effects of OA and enhanced irradiance levels on an assemblage from Baffin Bay (71°N, 68°W). Seawater was collected from just below the deep Chl a maximum, and the resident phytoplankton were exposed to 380 and 1000 µatm pCO2 at both 15% and 35% incident irradiance. On-deck incubations, in which temperatures were 6°C above in situ conditions, were monitored for phytoplankton growth, biomass stoichiometry, net primary production, photo-physiology and taxonomic composition. During the 8-day experiment, taxonomic diversity decreased and the diatom Chaetoceros socialis became increasingly dominant irrespective of light or CO2 levels. We found no statistically significant effects from either higher CO2 or light on physiological properties of phytoplankton during the experiment. We did, however, observe an initial 2-day stress response in all treatments, and slight photo-physiological responses to higher CO2 and light during the first five days of the incubation. Our results thus indicate high resistance of Arctic phytoplankton to OA and enhanced irradiance levels, challenging the commonly predicted stimulatory effects of enhanced CO2 and light availability for primary production.
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/216453
推荐引用方式 GB/T 7714	Hoppe,Clara Jule Marie,Schuback,et al. Resistance of an Arctic phytoplankton assemblages to ocean acidification and high irradiance, link to supplement in MS Excel format.2017-07-26.https://doi.org/10.1594/PANGAEA.878255.