Emissions of biogenic volatile organic compounds from adjacent boreal fen and bog as impacted by vegetation composition

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Emissions of biogenic volatile organic compounds from adjacent boreal fen and bog as impacted by vegetation composition

Männistö, Elisa (author): University of Eastern Finland

Ylänne, Henni (author): Lund University,Lunds universitet,BECC: Biodiversity and Ecosystem services in a Changing Climate,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,MERGE: ModElling the Regional and Global Earth system,Centre for Environmental and Climate Science (CEC),Faculty of Science,University of Eastern Finland

Losoi, Mari (author): University of Eastern Finland

Keinänen, Markku (author): University of Eastern Finland

Yli-Pirilä, Pasi (author): University of Eastern Finland

Korrensalo, Aino (author): Natural Resources Institute Finland (Luke),University of Eastern Finland

Bäck, Jaana (author): University of Helsinki

Hellén, Heidi (author): Finnish Meteorological Institute

Virtanen, Annele (author): University of Eastern Finland

Tuittila, Eeva Stiina (author): University of Eastern Finland

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(creator_code:org_t)

Elsevier BV, 2023
2023
English 10 s.
In: Science of the Total Environment. - : Elsevier BV. - 0048-9697. ; 858

Related links:: http://dx.doi.org/10... (free); show more...; https://lup.lub.lu.s...; https://doi.org/10.1...; show less...

Journal article (peer-reviewed)

Abstract Subject headings

Peatland ecosystems emit biogenic volatile organic compounds (BVOC), which have a net cooling impact on the climate. However, the quality and quantity of BVOC emissions, and how they are regulated by vegetation and peatland type remain poorly understood. Here we measured BVOC emissions with dynamic enclosures from two major boreal peatland types, a minerotrophic fen and an ombrotrophic bog situated in Siikaneva, southern Finland and experimentally assessed the role of vegetation by removing vascular vegetation with or without the moss layer. Our measurements from four campaigns during growing seasons in 2017 and 2018 identified emissions of 59 compounds from nine different chemical groups. Isoprene accounted for 81 % of BVOC emissions. Measurements also revealed uptake of dichloromethane. Total BVOC emissions and the emissions of isoprene, monoterpenoids, sesquiterpenes, homoterpenes, and green leaf volatiles were tightly connected to vascular plants. Isoprene and sesquiterpene emissions were associated with sedges, whereas monoterpenoids and homoterpenes were associated with shrubs. Additionally, isoprene and alkane emissions were higher in the fen than in the bog and they significantly contributed to the higher BVOC emissions from intact vegetation in the fen. During an extreme drought event in 2018, emissions of organic halides were absent. Our results indicate that climate change with an increase in shrub cover and increased frequency of extreme weather events may have a negative impact on total BVOC emissions that otherwise are predicted to increase in warmer temperatures. However, these changes also accompanied a change in BVOC emission quality. As different compounds differ in their capacity to form secondary organic aerosols, the ultimate climate impact of peatland BVOC emissions may be altered.

Subject headings

NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)
NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)

Keyword

Dwarf shrub
Moss
Peat
Peatland
Sedge
Sphagnum

Publication and Content Type

art (subject category)
ref (subject category)

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By the author/editor: Männistö, Elisa; Ylänne, Henni; Losoi, Mari; Keinänen, Markku; Yli-Pirilä, Pasi; Korrensalo, Aino; show more...; Bäck, Jaana; Hellén, Heidi; Virtanen, Annele; Tuittila, Eeva S ...; show less...

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NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Climate Research

NATURAL SCIENCES: NATURAL SCIENCES; and Biological Scien ...; and Ecology

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Environmental Sc ...

Articles in the publication: Science of the T ...

By the university: Lund University

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