DOI: 10.1007/s12237-019-00677-0
论文题名: Legacy Effects of Eutrophication on Modern Methane Dynamics in a Boreal Estuary
作者: Myllykangas J.-P. ; Hietanen S. ; Jilbert T.
刊名: Estuaries and Coasts
ISSN: 15592723
出版年: 2020
卷: 43, 期: 2 语种: 英语
英文关键词: Anaerobic oxidation of methane
; Aquatic biogeochemistry
; Baltic Sea
; Communicated by Margaret R. Mulholland
; Greenhouse gases
; Organic matter cycling
Scopus关键词: anaerobic digestion
; archipelago
; biogeochemistry
; estuary
; eutrophication
; greenhouse gas
; hydrodynamics
; methane
; methanogenesis
; nutrient dynamics
; organic matter
; oxidation
; Atlantic Ocean
; Baltic Sea
英文摘要: Estuaries are important conduits between terrestrial and marine aquatic systems and function as hot spots in the aquatic methane cycle. Eutrophication and climate change may accelerate methane emissions from estuaries, causing positive feedbacks with global warming. Boreal regions will warm rapidly in the coming decades, increasing the need to understand methane cycling in these systems. In this 3-year study, we investigated seasonal and spatial variability of methane dynamics in a eutrophied boreal estuary, both in the water column and underlying sediments. The estuary and the connected archipelago were consistently a source of methane to the atmosphere, although the origin of emitted methane varied with distance offshore. In the estuary, the river was the primary source of atmospheric methane. In contrast, in the adjacent archipelago, sedimentary methanogenesis fueled by eutrophication over previous decades was the main source. Methane emissions to the atmosphere from the study area were highly variable and dependent on local hydrodynamics and environmental conditions. Despite evidence of highly active methanogenesis in the studied sediments, the vast majority of the upwards diffusive flux of methane was removed before it could escape to the atmosphere, indicating that oxidative filters are presently still functioning regardless of previous eutrophication and ongoing climate change. © 2019, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159088
Appears in Collections: 气候变化与战略
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作者单位: Ecosystems and Environment Research Program, Faculty of Biological and Environmental Sciences, University of Helsinki, P.O. Box 65, Helsinki, FI-00014, Finland; Tvärminne Zoological Station, University of Helsinki, J.A. Palménintie 260, Hanko, 10900, Finland
Recommended Citation:
Myllykangas J.-P.,Hietanen S.,Jilbert T.. Legacy Effects of Eutrophication on Modern Methane Dynamics in a Boreal Estuary[J]. Estuaries and Coasts,2020-01-01,43(2)