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Varying Vegetation Composition, Respiration and Photosynthesis Decrease Temporal Variability of the CO2 Sink in a Boreal Bog

dc.contributor.authorKorrensalo, Aino
dc.contributor.authorMehtätalo, Lauri
dc.contributor.authorAlekseychik, Pavel
dc.contributor.authorUljas, Salli
dc.contributor.authorMammarella, Ivan
dc.contributor.authorVesala, Timo
dc.contributor.authorTuittila, Eeva-Stiina
dc.contributor.departmentid4100310610
dc.contributor.orcidhttps://orcid.org/0000-0002-4081-3917
dc.contributor.organizationLuonnonvarakeskus
dc.date.accessioned2019-12-05T09:02:50Z
dc.date.accessioned2025-05-28T13:45:07Z
dc.date.available2019-12-05T09:02:50Z
dc.date.issued2020
dc.description.abstractWe quantified the role of spatially varying vegetation composition in seasonal and interannual changes in a boreal bog’s CO2 uptake. We divided the spatially heterogeneous site into six microform classes based on plant species composition and measured their net ecosystem exchange (NEE) using chamber method over the growing seasons in 2012–2014. A nonlinear mixed-effects model was applied to assess how the contributions of microforms with different vegetation change temporally, and to upscale NEE to the ecosystem level to be compared with eddy covariance (EC) measurements. Both ecosystem respiration (R) and gross photosynthesis (PG) were the largest in high hummocks, 894–964 (R) and 969–1132 (PG) g CO2 m−2 growing season−1, and decreased toward the wetter microforms. NEE had a different spatial pattern than R and PG; the highest cumulative seasonal CO2 sink was found in lawns in all years (165–353 g CO2 m−2). Microforms with similar wetness but distinct vegetation had different NEE, highlighting the importance of vegetation composition in regulating CO2 sink. Chamber-based ecosystem-level NEE was smaller and varied less interannually than the EC-derived estimate, indicating a need for further research on the error sources of both methods. Lawns contributed more to ecosystem-level NEE (55–78%) than their areal cover within the site (21.5%). In spring and autumn, lawns had the highest NEE, whereas in midsummer differences among microforms were small. The contributions of all microforms to the ecosystem-level NEE varied seasonally and interannually, suggesting that spatially heterogeneous vegetation composition could make bog CO2 uptake temporally more stable.
dc.description.vuosik2019
dc.format.bitstreamtrue
dc.format.pagerange842-858
dc.identifier.olddbid487598
dc.identifier.oldhandle10024/545067
dc.identifier.urihttps://jukuri.luke.fi/handle/11111/24209
dc.identifier.urnURN:NBN:fi-fe2021112356438
dc.language.isoen
dc.okm.corporatecopublicationei
dc.okm.discipline1172
dc.okm.internationalcopublicationon
dc.okm.openaccess2 = Hybridijulkaisukanavassa ilmestynyt avoin julkaisu
dc.okm.selfarchivedon
dc.publisherSpringer Science and Business Media LLC
dc.relation.doi10.1007/s10021-019-00434-1
dc.relation.ispartofseriesEcosystems
dc.relation.issn1432-9840
dc.relation.issn1435-0629
dc.relation.volume23
dc.rightsCC BY 4.0
dc.source.identifierhttps://jukuri.luke.fi/handle/10024/545067
dc.subject.ysopeatland
dc.subject.ysocarbon
dc.subject.ysocarbon dioxide
dc.subject.ysobog
dc.subject.ysoeddy covariance
dc.subject.ysonet ecosystem
dc.subject.ysoexchange
dc.subject.ysophotosynthesis
dc.subject.ysorespiration
dc.subject.ysovegetation
dc.titleVarying Vegetation Composition, Respiration and Photosynthesis Decrease Temporal Variability of the CO2 Sink in a Boreal Bog
dc.typepublication
dc.type.okmfi=A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä|sv=A1 Originalartikel i en vetenskaplig tidskrift|en=A1 Journal article (refereed), original research|
dc.type.versionfi=Publisher's version|sv=Publisher's version|en=Publisher's version|

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