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Methane emissions from macrophyte beach wrack on Baltic seashores
Stockholm Univ, Dept Ecol Environm & Plant Sci, S-10691 Stockholm, Sweden..ORCID-id: 0000-0003-0363-110X
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Naturresurser och hållbar utveckling. (Blått centrum Gotland)
KTH, Royale Inst Technol, KTH Teknikringen 10B, Stockholm, Sweden.;Dept Sustainable Dev Environm Sci & Engn, S-10044 Stockholm, Sweden..
Univ Gothenburg, Dept Marine Sci, Box 461, S-40530 Gothenburg, Sweden..
2023 (engelsk)Inngår i: Ambio, ISSN 0044-7447, E-ISSN 1654-7209, Vol. 52, s. 171-181Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Beach wrack of marine macrophytes is a natural component of many beaches. To test if such wrack emits the potent greenhouse gas methane, field measurements were made at different seasons on beach wrack depositions of different ages, exposure, and distance from the water. Methane emissions varied greatly, from 0 to 176 mg CH4-C m(-2) day(-1), with a clear positive correlation between emission and temperature. Dry wrack had lower emissions than wet. Using temperature data from 2016 to 2020, seasonal changes in fluxes were calculated for a natural wrack accumulation area. Such calculated average emissions were close to zero during winter, but peaked in summer, with very high emissions when daily temperatures exceeded 20 degrees C. We conclude that waterlogged beach wrack significantly contributes to greenhouse gas emissions and that emissions might drastically increase with increasing global temperatures. When beach wrack is collected into heaps away from the water, the emissions are however close to zero.

sted, utgiver, år, opplag, sider
Springer, 2023. Vol. 52, s. 171-181
Emneord [en]
Beach cast, Baltic Sea, Climate change, Greenhouse gas, Marine macrophytes, Methane
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Identifikatorer
URN: urn:nbn:se:uu:diva-495234DOI: 10.1007/s13280-022-01774-4ISI: 000846110100001PubMedID: 36029461OAI: oai:DiVA.org:uu-495234DiVA, id: diva2:1730722
Tilgjengelig fra: 2023-01-25 Laget: 2023-01-25 Sist oppdatert: 2023-01-25bibliografisk kontrollert

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