DOI: 10.1007/s10533-013-9945-y
Scopus记录号: 2-s2.0-84896403565
论文题名: Glacial flours as a potential source of Fe(II) and Fe(III) to polar waters
作者: Hopwood M.J. ; Statham P.J. ; Tranter M. ; Wadham J.L.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 118, 期: 2018-01-03 起始页码: 443
结束页码: 452
语种: 英语
英文关键词: Ferrihydrite
; Glacial flour
; Iron
; Particulate iron
Scopus关键词: bioavailability
; biological uptake
; carbon
; chlorophyll
; glacial environment
; iron
; ligand
; limiting factor
; meltwater
; polar region
; primary production
; redox potential
; Antarctica
; Arctic
; Southern Ocean
英文摘要: Supply of Fe to high nitrate low chlorophyll (HNLC) waters, such as the Southern Ocean, is the principle limiting factor for primary production and the associated carbon uptake. Glacial meltwaters have recently been shown to provide a globally substantial input of Fe to both Antarctic and Arctic polar waters. The particulate Fe flux in glacial runoff is several orders of magnitude greater than the dissolved Fe flux and yet little is known, to date, about the potential bioavailability of this particulate Fe. A fraction of particulate Fe may be bioavailable to organisms and thus have a significant impact on biota in HNLC zones. Here, we describe in detail the composition and speciation of Fe released from four different glacial flours. We show that the fraction of labile Fe varies markedly between different flours and is not proportional to total Fe. Furthermore a small fraction of the particulate Fe is available to the Fe(II) selective ligand ferrozine, which indicates active redox cycling on the surface of the flour. © 2014 Springer Science+Business Media Dordrecht. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83706
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton, Southampton, SO14 3ZH, United Kingdom; Bristol Glaciology Centre, School of Geographical Sciences, University of Bristol, Bristol, BS8 1SS, United Kingdom
Recommended Citation:
Hopwood M.J.,Statham P.J.,Tranter M.,et al. Glacial flours as a potential source of Fe(II) and Fe(III) to polar waters[J]. Biogeochemistry,2014-01-01,118(2018-01-03)