globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2854
论文题名:
Competitive fitness of a predominant pelagic calcifier impaired by ocean acidification
作者: Riebesell U.; Bach L.T.; Bellerby R.G.J.; Monsalve J.R.B.; Boxhammer T.; Czerny J.; Larsen A.; Ludwig A.; Schulz K.G.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2017
卷: 10, 期:1
起始页码: 19
结束页码: 23
语种: 英语
Scopus关键词: calcification ; calcium carbonate ; carbon cycle ; carbon dioxide ; coccolith ; dimethylsulfide ; fjord ; growth rate ; ocean acidification ; pelagic environment ; physiological response ; phytoplankton ; population decline ; population size ; primary production ; seawater ; Norway ; Emiliania huxleyi ; Haptophyceae
英文摘要: Coccolithophores - single-celled calcifying phytoplankton - are an important group of marine primary producers and the dominant builders of calcium carbonate globally. Coccolithophores form extensive blooms and increase the density and sinking speed of organic matter via calcium carbonate ballasting. Thereby, they play a key role in the marine carbon cycle. Coccolithophore physiological responses to experimental ocean acidification have ranged from moderate stimulation to substantial decline in growth and calcification rates, combined with enhanced malformation of their calcite platelets. Here we report on a mesocosm experiment conducted in a Norwegian fjord in which we exposed a natural plankton community to a wide range of CO2-induced ocean acidification, to test whether these physiological responses affect the ecological success of coccolithophore populations. Under high-CO2 treatments, Emiliania huxleyi, the most abundant and productive coccolithophore species, declined in population size during the pre-bloom period and lost the ability to form blooms. As a result, particle sinking velocities declined by up to 30% and sedimented organic matter was reduced by up to 25% relative to controls. There were also strong reductions in seawater concentrations of the climate-active compound dimethylsulfide in CO 2 -enriched mesocosms. We conclude that ocean acidification can lower calcifying phytoplankton productivity, potentially creating a positive feedback to the climate system. © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105860
Appears in Collections:气候减缓与适应
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作者单位: GEOMAR Helmholtz Centre for Ocean Research Kiel, DüsternbrookerWeg 20, Kiel, Germany; State Key Laboratory for Estuarine and Coastal Research, East China Normal University, 3663 Zhongshan N. Road, Shanghai, China; Norwegian Institute for Water Research, Thormøhlensgt, 53 D, Bergen, Norway; Facultad de Ingeniería Marítima, Ciencias Biologicas, Oceanicas y Recursos Naturales, Escuela Superior Politécnica del Litoral, Litoral, Guayaquil, Ecuador; Hjort Centre for Marine Ecosystem Dynamics, Uni Research Environment, Nygaardsgaten 112, Bergen, Norway; Centre for Coastal Biogeochemistry, Southern Cross University, Military Road, East Lismore, NSW, Australia

Recommended Citation:
Riebesell U.,Bach L.T.,Bellerby R.G.J.,et al. Competitive fitness of a predominant pelagic calcifier impaired by ocean acidification[J]. Nature Geoscience,2017-01-01,10(1)
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