DOI: 10.1016/j.watres.2018.03.060
Scopus记录号: 2-s2.0-85053521564
论文题名: The phantom midge menace: Migratory Chaoborus larvae maintain poor ecosystem state in eutrophic inland waters
作者: Tang K.W. ; Flury S. ; Vachon D. ; Ordóñez C. ; McGinnis D.F.
刊名: Water research
ISSN: 18792448
出版年: 2018
卷: 139 起始页码: 30
结束页码: 37
语种: 英语
英文关键词: Chaoborus
; Eutrophication
; Methane
; Nutrient internal loading
; Positive feedback
Scopus关键词: methane
; oxygen
; phosphorus
; analysis
; animal
; Chironomidae
; ecosystem
; eutrophication
; lake
; larva
; sediment
; Switzerland
; water pollutant
; Animals
; Chironomidae
; Ecosystem
; Eutrophication
; Geologic Sediments
; Lakes
; Larva
; Methane
; Oxygen
; Phosphorus
; Switzerland
; Water Pollutants, Chemical
英文摘要: Chaoborus spp. (phantom midge) are prevalent in eutrophic inland waters. In Lake Soppen, Switzerland, C. flavicans larvae diurnally migrate between the methane-rich, oxygen-depleted hypolimnion and sediments, and the methane-poor, oxygen-rich epilimnion. Using a combination of experiments and system modelling, this study demonstrated that the larvae's burrowing activities in and out of the sediment perturbed the sediment and re-introduced sequestered phosphorus into the overlying water at a rate of 0.022 μg P ind-1 d-1, thereby exacerbating internal nutrient loading in the water column. Fluxes of sediment methane and other reduced solutes enhanced by the larval bioturbation would consume oxygen and sustain the hypoxic/anoxic condition below the thermocline. In addition to increasing diffusive fluxes, migrating larvae also directly transported methane in their gas vesicles from the deep water and release it in the surface water at a rate of 0.99 nmol CH4 ind-1 d-1, potentially contributing to methane emission to air. As nutrient pollution and climate warming persist or worsen in the coming decades, proliferation of Chaoborus could intensify this positive feedback loop and delay lake recovery. Copyright © 2018 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112748
Appears in Collections: 气候减缓与适应
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作者单位: Department of Biosciences, Swansea University, Swansea, SA2 8PP, United Kingdom; Stream Biofilm and Ecosystem Research Laboratory, Institute of Environmental Engineering, School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne, Station 2, Lausanne, 1015, Switzerland; Aquatic Physics Group, Department F.-A. Forel for Environmental and Aquatic Sciences (DEFSE), Faculty of Science, University of Geneva, Uni Carl Vogt, 66 boulevard Carl-Vogt, Geneva, 1211, Switzerland
Recommended Citation:
Tang K.W.,Flury S.,Vachon D.,et al. The phantom midge menace: Migratory Chaoborus larvae maintain poor ecosystem state in eutrophic inland waters[J]. Water research,2018-01-01,139