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Methane Emissions F...
Methane Emissions From Nordic Seagrass Meadow Sediments
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- Asplund, Maria. E., 1970 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap, Kristineberg,Department of Biological and Environmental Sciences, Kristineberg
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- Bonaglia, Stefano, 1983 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för marina vetenskaper,Department of marine sciences
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- Boström, Christoffer (author)
- Faculty of Science and Engineering, Environmental and Marine Biology, Åbo Akademi University, Åbo, Finland
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- Dahl, Martin (author)
- Södertörns högskola,Miljövetenskap
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- Deyanova, Diana (author)
- Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap, Kristineberg,Department of Biological and Environmental Sciences, Kristineberg
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- Gagnon, Karine (author)
- Faculty of Science and Engineering, Environmental and Marine Biology, Åbo Akademi University, Åbo, Finland
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- Gullström, Martin (author)
- Södertörns högskola,Miljövetenskap
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- Holmer, Marianne (author)
- Department of Biology, Danish Institute for Advanced Study, University of Southern Denmark, Odense, Denmark
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- Björk, Mats, 1960- (author)
- Stockholms universitet,Institutionen för ekologi, miljö och botanik
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(creator_code:org_t)
- 2022-01-18
- 2022
- English.
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In: Frontiers in Marine Science. - : Frontiers Media S.A.. - 2296-7745. ; 8
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Abstract
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- Shallow coastal soft bottoms are important carbon sinks. Submerged vegetation has been shown to sequester carbon, increase sedimentary organic carbon (C-org) and thus suppress greenhouse gas (GHG) emissions. The ongoing regression of seagrass cover in many areas of the world can therefore lead to accelerated emission of GHGs. In Nordic waters, seagrass meadows have a high capacity for carbon storage, with some areas being recognized as blue carbon hotspots. To what extent these carbon stocks lead to emission of methane (CH4) is not yet known. We investigated benthic CH4 emission (i.e., net release from the sediment) in relation to seagrass (i.e. Zostera marina) cover and sedimentary C-org content (%) during the warm summer period (when emissions are likely to be highest). Methane exchange was measured in situ with benthic chambers at nine sites distributed in three regions along a salinity gradient from similar to 6 in the Baltic Sea (Finland) to similar to 20 in Kattegat (Denmark) and similar to 26 in Skagerrak (Sweden). The net release of CH4 from seagrass sediments and adjacent unvegetated areas was generally low compared to other coastal habitats in the region (such as mussel banks and wetlands) and to other seagrass areas worldwide. The lowest net release was found in Finland. We found a positive relationship between CH4 net release and sedimentary C-org content in both seagrass meadows and unvegetated areas, whereas no clear relationship between seagrass cover and CH4 net release was observed. Overall, the data suggest that Nordic Zostera marina meadows release average levels of CH4 ranging from 0.3 to 3.0 mu g CH4 m(-2) h(-1), which is at least 12-78 times lower (CO2 equivalents) than their carbon accumulation rates previously estimated from seagrass meadows in the region, thereby not hampering their role as carbon sinks. Thus, the relatively weak CH4 emissions from Nordic Z. marina meadows will not outweigh their importance as carbon sinks under present environmental conditions.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)
Keyword
- seagrass
- greenhouse gas
- blue carbon
- nordic
- Zostera marina
- Östersjö- och Östeuropaforskning
- Baltic and East European studies
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Asplund, Maria. ...
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Bonaglia, Stefan ...
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Boström, Christo ...
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Dahl, Martin
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Deyanova, Diana
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Gagnon, Karine
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Gullström, Marti ...
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Holmer, Marianne
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Björk, Mats, 196 ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Environmental Sc ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Ecology
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Climate Research
- Articles in the publication
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Frontiers in Mar ...
- By the university
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Södertörn University
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Stockholm University
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University of Gothenburg