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dc.contributor.authorSandén, Hans
dc.contributor.authorMayer, Mathias
dc.contributor.authorStark, Sari
dc.contributor.authorSandén, Taru
dc.contributor.authorNilsson, Lars Ola
dc.contributor.authorJepsen, Jane Uhd
dc.contributor.authorWäli, Oiippa Ritta
dc.contributor.authorRewald, Boris
dc.date.accessioned2019-06-07T07:56:15Z
dc.date.available2019-06-07T07:56:15Z
dc.date.issued2019
dc.identifier.issn1432-9840
dc.identifier.urihttp://hdl.handle.net/11250/2600271
dc.description.abstractTree mortality from insect infestations can significantly reduce carbon storage in forest soils. In subarctic birch forests (Betula pubescens), ecosystem C cycling is largely affected by recurrent outbreaks of defoliating geometrid moths (Epirrita autumnata, Operophtera brumata). Here, we show that soil C stocks in birch forests across Fennoscandia did not change up to 8 years after moth outbreaks. We found that a decrease in woody fine roots was accompanied by a lower soil CO2 efflux rate and a higher soil N availability following moth outbreaks. We suggest that a high N availability and less ectomycorrhiza likely contributed to lowered heterotrophic respiration and soil enzymatic activity. Based on proxies for decomposition (heterotrophic respiration, phenol oxidase potential activity), we conclude that a decrease in decomposition is a prime cause why soil C stocks of mountain birch forest ecosystems have not changed after moth outbreaks. Compared to disturbed temperate and boreal forests, a CO2-related positive feedback of forest disturbance on climate change might therefore be smaller in subarctic regions.nb_NO
dc.language.isoengnb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.subjectBetula pubescensnb_NO
dc.subjectdisturbed subarctic forestsnb_NO
dc.subjectEpirrita autumnatanb_NO
dc.subjectheterotrophic soil respirationnb_NO
dc.subjectOperophtera brumatanb_NO
dc.subjectroot biomassnb_NO
dc.subjectsoil carbon sequestrationnb_NO
dc.subjectsoil CO2 effluxnb_NO
dc.subjectsoil enzyme activitynb_NO
dc.subjectstructural equation modellingnb_NO
dc.titleMoth Outbreaks Reduce Decomposition in Subarctic Forest Soilsnb_NO
dc.typePeer reviewednb_NO
dc.rights.holder© 2019 The Author(s)nb_NO
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480nb_NO
dc.source.journalEcosystemsnb_NO
dc.identifier.doi10.1007/s10021-019-00394-6
dc.identifier.cristin1703351
dc.relation.projectNorges Forskningsråd: 24454nb_NO


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