DOI: 10.1111/gcb.12105
论文题名: Interacting effects of ocean acidification and warming on growth and DMS-production in the haptophyte coccolithophore Emiliania huxleyi
作者: Arnold H.E. ; Kerrison P. ; Steinke M.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 4 起始页码: 1007
结束页码: 1016
语种: 英语
英文关键词: Climate
; Dimethyl sulfide
; Dimethylsulfoniopropionate
; DMS-production
; Emiliania huxleyi CCMP 373
; Global environmental change
; Ocean acidification
; Temperature
Scopus关键词: acid
; carbon dioxide
; dimethyl sulfide
; dimethylpropiothetin
; sulfide
; sulfonium derivative
; acidification
; carbon dioxide
; dimethylsulfide
; environmental change
; environmental conditions
; growth rate
; phytoplankton
; sulfur
; warming
; article
; bioreactor
; chemistry
; growth, development and aging
; Haptophyta
; metabolism
; pH
; sea
; Acids
; Bioreactors
; Carbon Dioxide
; Haptophyta
; Hydrogen-Ion Concentration
; Oceans and Seas
; Sulfides
; Sulfonium Compounds
; Emiliania huxleyi
; Haptophyceae
英文摘要: The production of the marine trace gas dimethyl sulfide (DMS) provides 90% of the marine biogenic sulfur in the atmosphere where it affects cloud formation and climate. The effects of increasing anthropogenic CO2 and the resulting warming and ocean acidification on trace gas production in the oceans are poorly understood. Here we report the first measurements of DMS-production and data on growth, DMSP and DMS concentrations in pH-stated cultures of the phytoplankton haptophyte Emiliania huxleyi. Four different environmental conditions were tested: ambient, elevated CO2 (+CO2), elevated temperature (+T) and elevated temperature and CO2 (+TCO2). In comparison to the ambient treatment, average DMS production was about 50% lower in the +CO2 treatment. Importantly, temperature had a strong effect on DMS production and the impacts outweighed the effects of a decrease in pH. As a result, the +T and +TCO2 treatments showed significantly higher DMS production of 36.2 ± 2.58 and 31.5 ± 4.66 μmol L-1 cell volume (CV) h-1 in comparison with the +CO2 treatment (14.9 ± 4.20 μmol L-1 CV h-1). As the cultures were aerated with an air/CO2 mixture, DMS was effectively removed from the incubation bottles so that concentration remained relatively low (3.6-6.1 mmol L-1 CV). Intracellular DMSP has been shown to increase in E. huxleyi as a result of elevated temperature and/or elevated CO2 and our results are in agreement with this finding: the ambient and +CO2 treatments showed 125 ± 20.4 and 162 ± 27.7 mmol L-1 CV, whereas +T and +TCO2 showed significantly increased intracellular DMSP concentrations of 195 ± 15.8 and 211 ± 28.2 mmol L-1 CV respectively. Growth was unaffected by the treatments, but cell diameter decreased significantly under elevated temperature. These results indicate that DMS production is sensitive to CO2 and temperature in E. huxleyi. Hence, global environmental change that manifests in ocean acidification and warming may not result in decreased DMS as suggested by earlier studies investigating the effect of elevated CO2 in isolation. © 2012 Blackwell Publishing Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62486
Appears in Collections: 影响、适应和脆弱性
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作者单位: School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester, CO4 3SQ, United Kingdom; Culture, Tourism and Sport, Town Hall, High Street, Lowestoft, Suffolk NR32 1TQ, United Kingdom; Scottish Association for Marine Science, Scottish Marine Institute, Oban, Argyll PA37 1QA, United Kingdom
Recommended Citation:
Arnold H.E.,Kerrison P.,Steinke M.. Interacting effects of ocean acidification and warming on growth and DMS-production in the haptophyte coccolithophore Emiliania huxleyi[J]. Global Change Biology,2013-01-01,19(4)