DOI: 10.1002/2013GB004641
Scopus记录号: 2-s2.0-84887112435
论文题名: The 2008 Emiliania huxleyi bloom along the Patagonian Shelf: Ecology, biogeochemistry, and cellular calcification
作者: Poulton A ; J ; , Painter S ; C ; , Young J ; R ; , Bates N ; R ; , Bowler B ; , Drapeau D ; , Lyczsckowski E ; , Balch W ; M
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2013
卷: 27, 期: 4 起始页码: 1023
结束页码: 1033
语种: 英语
英文关键词: calcification
; coccolithophore
; Emiliania huxleyi
; Patagonian Shelf
; Southern Ocean
Scopus关键词: Coccolithophores
; Emiliania huxleyi
; Global production
; Inorganic carbon
; Intensive measurements
; Patagonian Shelf
; Primary production
; Southern ocean
; Biogeochemistry
; Biomineralization
; Bone
; Calcification (biochemistry)
; Carbon
; Ecology
; Estimation
; Calcite
; biogeochemistry
; calcification
; calcite
; calcium carbonate
; climate effect
; coccolith
; community composition
; dominance
; global ocean
; morphotype
; population decline
; primary production
; Atlantic Ocean
; Patagonian Shelf
; Southern Ocean
; Bacillariophyta
; Emiliania huxleyi
; Fragilariopsis
; Haptophyceae
英文摘要: Coccolithophore blooms are significant contributors to the global production and export of calcium carbonate (calcite). The Patagonian Shelf is a site of intense annual coccolithophore blooms during austral summer. During December 2008, we made intensive measurements of the ecology, biogeochemistry, and physiology of a coccolithophore bloom. High numbers of Emiliania huxleyi cells and detached coccoliths (>1 × 103 mL-1 and >10 × 103 mL-1, respectively), high particulate inorganic carbon concentrations (>10 mmol C m-2), and high calcite production (up to 7.3 mmol C m-2 d-1) all characterized bloom waters. The bloom was dominated by the low-calcite-containing B/C morphotype of Emiliania huxleyi, although a small (<10 μm) Southern Ocean diatom of the genus Fragilariopsis was present in almost equal numbers (0.2-2 × 103 mL-1). Estimates of Fragilariopsis contributions to chlorophyll, phytoplankton carbon, and primary production were >30%, similar to estimates for E. huxleyi and indicative of a significant role for this diatom in bloom biogeochemistry. Cell-normalized calcification rates, when corrected for a high number of nonactive cells, were relatively high and when normalized to estimates of coccolith calcite indicate excessive coccolith production in the declining phase of the bloom. We find that low measures of calcite and calcite production relative to other blooms in the global ocean indicate that the dominance of the B/C morphotype may lead to overall lower calcite production. Globally, this suggests that morphotype composition influences regional bloom inventories of carbonate production and export and that climate-induced changes in morphotype biogeography could affect the carbon cycle. Key Points Describes an Emiliania huxleyi B/C morphotype bloom on Patagonian Shelf Bloom declining despite high cellular calcification and coccolith production Low bloom calcite suggested to be due to dominance by B/C morphotype ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77547
Appears in Collections: 气候变化事实与影响
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作者单位: National Oceanography Centre, Waterfront Campus, Southampton SO14 3ZH, United Kingdom; Department of Earth Sciences, University College London, London, United Kingdom; Bermuda Institute of Ocean Sciences, St. George's, Bermuda; Bigelow Laboratory for Ocean Sciences Maine, East Boothbay, United States
Recommended Citation:
Poulton A,J,, Painter S,et al. The 2008 Emiliania huxleyi bloom along the Patagonian Shelf: Ecology, biogeochemistry, and cellular calcification[J]. Global Biogeochemical Cycles,2013-01-01,27(4)