DOI: 10.1016/j.watres.2018.02.043
Scopus记录号: 2-s2.0-85046037381
论文题名: Dissolved organic matter signatures vary between naturally acidic, circumneutral and groundwater-fed freshwaters in Australia
作者: Holland A. ; Stauber J. ; Wood C.M. ; Trenfield M. ; Jolley D.F.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 137 起始页码: 184
结束页码: 192
语种: 英语
英文关键词: Australia
; Dissolved organic matter
; Fluorescence
; Humic substances
; PARAFAC
; Temperate
; Tropical
Scopus关键词: Aquatic ecosystems
; Aromatic compounds
; Aromatization
; Biogeochemistry
; Biological materials
; Dissolution
; Fluorescence
; Fluorescence spectroscopy
; Groundwater
; Molecular weight
; Principal component analysis
; Proteins
; Australia
; Dissolved organic matters
; Humic substances
; PARAFAC
; Temperate
; Tropical
; Quality control
; dissolved organic matter
; fresh water
; fulvic acid
; ground water
; humic acid
; fresh water
; ground water
; dissolved organic matter
; fluorescence
; freshwater
; groundwater
; groundwater-surface water interaction
; humic substance
; protein
; seasonal variation
; temperate environment
; tropical region
; water quality
; Article
; Australia
; autumn
; molecular weight
; nonhuman
; periphyton
; phytoplankton
; priority journal
; spring
; summer
; water quality
; winter
; chemistry
; environmental monitoring
; factor analysis
; pH
; principal component analysis
; procedures
; spectrofluorometry
; Australia
; Australia
; Environmental Monitoring
; Factor Analysis, Statistical
; Fresh Water
; Groundwater
; Hydrogen-Ion Concentration
; Principal Component Analysis
; Spectrometry, Fluorescence
英文摘要: Dissolved organic matter (DOM) plays important roles in both abiotic and biotic processes within aquatic ecosystems, and these in turn depend on the quality of the DOM. We collected and characterized chromophoric DOM (CDOM) from different Australian freshwater types (circumneutral, naturally acidic and groundwater-fed waterways), climatic regions and seasons. CDOM quality was characterized using absorbance and fluorescence spectroscopy. Excitation emission scans followed by parallel factor (PARAFAC) analysis showed that CDOM was characterized by three main components: protein-like, fulvic-like and humic-like components commonly associated with various waters globally in the Openfluor database. Principal component analysis showed that CDOM quality varied between naturally acidic, circumneutral and groundwater-fed waters, with unique CDOM quality signatures shown for each freshwater type. CDOM quality also differed significantly within some sites between seasons. Clear differences in dominant CDOM components were shown between freshwater types. Naturally acidic waters were dominated by highly aromatic (as indicated by the specific absorbance co-efficient (SAC340) and the specific UV absorbance (SUVA254) values which ranged between 31 and 50 cm2 mg−1 and 3.9–5.7 mg C−1 m−1 respectively), humic-like CDOM of high molecular weight (as indicated by abs254/365 which ranged from 3.8 to 4.3). In contrast, circumneutral waters were dominated by fulvic-like CDOM of lower aromaticity (SAC340: 7–21 cm2 mg−1 and SUVA254: 1.5–3.0 mg C−1 m−1) and lower molecular weight (abs254/365 5.1–9.3). The groundwater-fed site had a higher abundance of protein-like CDOM, which was the least aromatic (SAC340: 2–5 cm2 mg−1 and SUVA254: 0.58–1.1 mg C−1 m−1). CDOM was generally less aromatic, of a lower molecular weight and more autochthonous in nature during the summer/autumn sampling compared to winter/spring. Significant relationships were shown between various CDOM quality parameters and pH. This is the first study to show that different freshwater types (circumneutral, naturally acidic and groundwater-fed) contain distinct CDOM quality signatures in Australia, a continent with unique flora and geology. © 2018 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112824
Appears in Collections: 气候减缓与适应
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作者单位: La Trobe University, School of Life Science, Department of Ecology, Environment and Evolution, Murray Darling Freshwater Research Centre, Albury/Wodonga CampusVic, Australia; CSIRO Land and Water, Lucas HeightsNSW, Australia; University of British Columbia, Department of Zoology, Vancouver, BC, Canada; Environmental Research Institute of the Supervising Scientist, GPO Box 461, Darwin, NT, Australia; University of Wollongong, School of Chemistry, Centre for Molecular and Medical Biosciences, Wollongong, NSW, Australia
Recommended Citation:
Holland A.,Stauber J.,Wood C.M.,et al. Dissolved organic matter signatures vary between naturally acidic, circumneutral and groundwater-fed freshwaters in Australia[J]. Water Research,2018-01-01,137