气候变化领域集成服务门户(CCPortal): Seawater carbonate chemistry and maximum growth rates of Skeletonema marinoi and Alexandrium ostenfeldii, toxin composition of Alexandrium ostenfeldii in a laboratory experiment

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DOI	https://doi.org/10.1594/PANGAEA.823376
	Seawater carbonate chemistry and maximum growth rates of Skeletonema marinoi and Alexandrium ostenfeldii, toxin composition of Alexandrium ostenfeldii in a laboratory experiment
	Kremp; Anke; Godhe; Anna; Egardt; Jenny; Dupont; Sam; Suikkanen; Sanna; Casabianca; Silvia; Penna; Antonella
发布日期	2012-11-28
数据集类型	dataset
英文关键词	Alexandrium ostenfeldii ; Baltic Sea ; Bottles or small containers/Aquaria ( 20 L) ; Chromista ; Growth/Morphology ; Immunology/Self-protection ; Laboratory experiment ; Laboratory strains ; Mediterranean Sea ; North Atlantic ; Ochrophyta ; Pelagos ; Phytoplankton ; Single species ; Skeletonema marinoi ; Temperature
英文简介	Phytoplankton populations can display high levels of genetic diversity that, when reflected by phenotypic variability, may stabilize a species response to environmental changes. We studied the effects of increased temperature and CO2 availability as predicted consequences of global change, on 16 genetically different isolates of the diatom Skeletonema marinoi from the Adriatic Sea and the Skagerrak (North Sea), and on eight strains of the PST (paralytic shellfish toxin)-producing dinoflagellate Alexandrium ostenfeldii from the Baltic Sea. Maximum growth rates were estimated in batch cultures of acclimated isolates grown for five to 10 generations in a factorial design at 20 and 24 °C, and present day and next century applied atmospheric pCO2, respectively. In both species, individual strains were affected in different ways by increased temperature and pCO2. The strongest response variability, buffering overall effects, was detected among Adriatic S. marinoi strains. Skagerrak strains showed a more uniform response, particularly to increased temperature, with an overall positive effect on growth. Increased temperature also caused a general growth stimulation in A. ostenfeldii, despite notable variability in strain-specific response patterns. Our data revealed a significant relationship between strain-specific growth rates and the impact of pCO2 on growth-slow growing cultures were generally positively affected, while fast growing cultures showed no or negative responses to increased pCO2. Toxin composition of A. ostenfeldii was consistently altered by elevated temperature and increased CO2 supply in the tested strains, resulting in overall promotion of saxitoxin production by both treatments. Our findings suggest that phenotypic variability within populations plays an important role in the adaptation of phytoplankton to changing environments, potentially attenuating short-term effects and forming the basis for selection. In particular, A. ostenfeldii blooms may expand and increase in toxicity under increased water temperature and atmospheric pCO2 conditions, with potentially severe consequences for the coastal ecosystem.
空间范围	Median Latitude: 53.694147 * Median Longitude: 15.226232 * South-bound Latitude: 43.925000 * West-bound Longitude: 11.058330 * North-bound Latitude: 60.100000 * East-bound Longitude: 20.510000
时间范围	2009-03-04T00:00:00 - 2010-04-15T00:00:00
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/217574
推荐引用方式 GB/T 7714	Kremp,Anke,Godhe,et al. Seawater carbonate chemistry and maximum growth rates of Skeletonema marinoi and Alexandrium ostenfeldii, toxin composition of Alexandrium ostenfeldii in a laboratory experiment.2012-11-28.https://doi.org/10.1594/PANGAEA.823376.