Legacy effects of eutrophication on modern methane dynamics in a boreal estuary

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dc.contributor.author Myllykangas, Jukka-Pekka
dc.contributor.author Hietanen, Susanna
dc.contributor.author Jilbert, Tom
dc.date.accessioned 2020-03-23T15:06:01Z
dc.date.available 2020-03-23T15:06:01Z
dc.date.issued 2019-12-23
dc.identifier.citation Myllykangas , J-P , Hietanen , S & Jilbert , T 2019 , ' Legacy effects of eutrophication on modern methane dynamics in a boreal estuary ' , Estuaries and Coasts , vol. 43 , pp. 189–206 . https://doi.org/10.1007/s12237-019-00677-0
dc.identifier.other PURE: 130436384
dc.identifier.other PURE UUID: dcbb1746-b87e-4384-8ebb-791cc412cd07
dc.identifier.other WOS: 000504159300001
dc.identifier.other ORCID: /0000-0002-1572-8294/work/71183005
dc.identifier.other ORCID: /0000-0001-8165-0168/work/71183746
dc.identifier.other ORCID: /0000-0001-5259-6852/work/71183952
dc.identifier.uri http://hdl.handle.net/10138/313535
dc.description.abstract 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. en
dc.format.extent 18
dc.language.iso eng
dc.relation.ispartof Estuaries and Coasts
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject Aquatic biogeochemistry
dc.subject Organic matter cycling
dc.subject Greenhouse gases
dc.subject Baltic Sea
dc.subject Anaerobic oxidation of methane
dc.subject Communicated by Margaret R
dc.subject Mulholland
dc.subject BALTIC SEA
dc.subject ANAEROBIC OXIDATION
dc.subject COASTAL HYPOXIA
dc.subject WATER COLUMN
dc.subject GAS-EXCHANGE
dc.subject HYDROGEN-SULFIDE
dc.subject ECKERNFORDE BAY
dc.subject ORGANIC-MATTER
dc.subject NORTHERN LAKES
dc.subject CHESAPEAKE BAY
dc.subject 116 Chemical sciences
dc.subject 1172 Environmental sciences
dc.title Legacy effects of eutrophication on modern methane dynamics in a boreal estuary en
dc.type Article
dc.contributor.organization Ecosystems and Environment Research Programme
dc.contributor.organization Marine Ecosystems Research Group
dc.contributor.organization Aquatic Biogeochemistry Research Unit (ABRU)
dc.contributor.organization Tvärminne Zoological Station
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1007/s12237-019-00677-0
dc.relation.issn 1559-2723
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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