globalchange  > 气候减缓与适应
DOI: 10.1007/s10533-015-0144-x
Scopus记录号: 2-s2.0-84958679622
论文题名:
The mobility of phosphorus, iron, and manganese through the sediment–water continuum of a shallow eutrophic freshwater lake under stratified and mixed water-column conditions
作者: Giles C.D.; Isles P.D.F.; Manley T.; Xu Y.; Druschel G.K.; Schroth A.W.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2016
卷: 127, 期:1
起始页码: 15
结束页码: 34
语种: 英语
英文关键词: Eutrophication ; Hydrodynamics ; Internal loading ; Phosphorus ; Redox cycling
Scopus关键词: algal bloom ; bottom water ; eutrophication ; freshwater environment ; hydrodynamics ; iron ; lacustrine environment ; manganese ; mobility ; phosphorus ; phosphorus cycle ; redox conditions ; sediment chemistry ; sediment-water interface ; shallow water ; surficial sediment ; water column ; Lake Champlain ; Missisquoi Bay ; Cyanobacteria
英文摘要: The management of external nutrient inputs to eutrophic systems can be confounded due to a persistent pool of phosphorus (P) in lake sediments. The behaviors of P and trace metals depend largely on the reductive dissolution of amorphous iron (Fe) and manganese (Mn) (oxy)hydroxides in sediments; however, a holistic understanding of these dynamics in relation to the broader ecological and hydrodynamic conditions of the system remains elusive. We used a high-frequency monitoring approach to develop a comprehensive conceptual model of P, Mn, and Fe dynamics across the sediment water continuum of a shallow bay in Lake Champlain (Missisquoi Bay, USA). The greatest release of sediment P, Mn, and Fe occurred under stable hydrodynamic conditions, particularly during the onset of the cyanobacterial bloom and was associated with low available P and the accumulation of soluble Mn and Fe above the sediment–water interface (SWI). During the warmest part of the season, bloom severity and sediment P release was partially regulated by hydrodynamic drivers, which changed on hourly time scales to affect redox conditions at the SWI and bottom water concentrations of soluble P, Mn, and Fe. A geochemically distinct increase in soluble P and Fe concentrations, but not Mn, marked the influence of riverine inputs during a late season storm disturbance. Despite continued depletion of the reactive sediment P and metals pool into the bloom period, declining temperatures and a well-mixed water column resulted in bloom senescence and the return of P, Mn, and Fe to surface sediments. The closed cycling of P and metals in Missisquoi Bay poses a significant challenge for the long-term removal of P from this system. Multiple time-scale measures of physical and biogeochemical changes provide a basis for understanding P and trace metals behavior across sediments and the water column, which shape seasonally variable cyanobacterial blooms in shallow eutrophic systems. © 2015, Springer International Publishing Switzerland.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83430
Appears in Collections:气候减缓与适应
气候变化事实与影响

Files in This Item:

There are no files associated with this item.


作者单位: The James Hutton Institute, Invergowrie, Dundee, United Kingdom; Vermont Experimental Program to Stimulate Competitive Research, University of Vermont, Burlington, VT, United States; Rubenstein School of Environment and Natural Resources, University of Vermont, Burlington, VT, United States; Department of Geology, Middlebury College, Middlebury, VT, United States; Department of Chemistry and Chemical Biology, Indiana University – Purdue University Indianapolis, Indianapolis, IN, United States; Department of Geology, University of Vermont, Burlington, VT, United States

Recommended Citation:
Giles C.D.,Isles P.D.F.,Manley T.,et al. The mobility of phosphorus, iron, and manganese through the sediment–water continuum of a shallow eutrophic freshwater lake under stratified and mixed water-column conditions[J]. Biogeochemistry,2016-01-01,127(1)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Giles C.D.]'s Articles
[Isles P.D.F.]'s Articles
[Manley T.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Giles C.D.]'s Articles
[Isles P.D.F.]'s Articles
[Manley T.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Giles C.D.]‘s Articles
[Isles P.D.F.]‘s Articles
[Manley T.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.