DOI: 10.1016/j.watres.2018.10.047
Scopus记录号: 2-s2.0-85055496127
论文题名: Metalimnetic oxygen minimum and the presence of Planktothrix rubescens in a low-nutrient drinking water reservoir
作者: Wentzky V.C. ; Frassl M.A. ; Rinke K. ; Boehrer B.
刊名: Water Research
ISSN: 431354
出版年: 2019
卷: 148 起始页码: 208
结束页码: 218
语种: 英语
英文关键词: Deep chlorophyll maximum
; Fluorescence sensors
; Lake stratification
; Metalimnion
; Oxygen depletion
; Rappbode reservoir
Scopus关键词: Biochemical oxygen demand
; Chlorophyll
; Fluorescence
; Metals
; Nutrients
; Plants (botany)
; Potable water
; Reservoir management
; Reservoirs (water)
; Surface waters
; Water quality
; Chlorophyll a fluorescence
; Chlorophyll fluorescence
; Deep chlorophyll maximums
; Fluorescence sensors
; Metalimnion
; Oxygen depletion
; Photosynthetic activity
; Planktothrix rubescens
; Dissolved oxygen
; chlorophyll a
; drinking water
; fluorescent dye
; metalimnetic oxygen
; oxygen
; phycocyanin
; phycoerythrin
; unclassified drug
; chlorophyll a
; cyanobacterium
; dissolved oxygen
; drinking water
; fluorescence
; oxygen consumption
; oxygen minimum layer
; reservoir
; stratification
; thermocline
; water quality
; Article
; conductance
; cyanobacterium
; decomposition
; fluorescence
; follow up
; high performance liquid chromatography
; limit of quantitation
; measurement accuracy
; nonhuman
; nutrient
; oxygen concentration
; oxygen consumption
; oxygen saturation
; pH
; phytoplankton
; Planktothrix rubescens
; priority journal
; surface property
; thermocline
; water quality
; water supply
; Germany
; Planktothrix rubescens
英文摘要: Dissolved oxygen is a key player in water quality. Stratified water bodies show distinct vertical patterns of oxygen concentration, which can originate from physical, chemical or biological processes. We observed a pronounced metalimnetic oxygen minimum in the low-nutrient Rappbode Reservoir, Germany. Contrary to the situation in the hypolimnion, measurements of lateral gradients excluded the sediment contact zone from the major sources of oxygen depletion for the metalimnetic oxygen minimum. Instead, the minimum was the result of locally enhanced oxygen consumption in the open water body. A follow-up monitoring included multiple chlorophyll a fluorescence sensors with high temporal and vertical resolution to detect and document the evolution of phytoplankton. While chlorophyll fluorescence sensors with multiple channels detected a mass development of the phycoerythrin-rich cyanobacterium Planktothrix rubescens in the metalimnion, this species was overlooked by the commonly used single-channel chlorophyll sensor. The survey indicated that the waning P. rubescens fluorescence was responsible for the oxygen minimum in the metalimnion. We hypothesize that pelagic processes, i.e., either oxygen use through decomposition of dead organic material originating from P. rubescens or P. rubescens extending its respiration beyond its photosynthetic activity, induced the metalimnetic oxygen minimum. The deeper understanding of the oxygen dynamics is mandatory for optimizing reservoir management. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122214
Appears in Collections: 气候变化事实与影响
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作者单位: Helmholtz Centre for Environmental Research−UFZ, Brueckstrasse 3a, Magdeburg, D-39114, Germany; Australian Rivers Institute, Griffith University, 170 Kessels Rd, Nathan, Queensland 4111, Australia
Recommended Citation:
Wentzky V.C.,Frassl M.A.,Rinke K.,et al. Metalimnetic oxygen minimum and the presence of Planktothrix rubescens in a low-nutrient drinking water reservoir[J]. Water Research,2019-01-01,148