Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Plant expansion drives bacteria and collembola communities under winter climate change in frost-affected tundra
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap.
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap.
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap.
Ansvarig organisation
2019 (Engelska)Ingår i: Soil Biology and Biochemistry, ISSN 0038-0717, E-ISSN 1879-3428, Vol. 138, artikel-id UNSP 107569Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

At high latitudes, winter warming facilitates vegetation expansion into barren frost-affected soils. The interplay of changes in winter climate and plant presence may alter soil functioning via effects on decomposers. Responses of decomposer soil fauna and microorganisms to such changes likely differ from each other, since their life histories, dispersal mechanisms and microhabitats vary greatly.

We investigated the relative impacts of short-term winter warming and increases in plant cover on bacteria and collembola community composition in cryoturbated, non-sorted circle tundra. By covering non-sorted circles with insulating gardening fibre cloth (fleeces) or using stone walls accumulating snow, we imposed two climate-change scenarios: snow accumulation increased autumn-to-late winter soil temperatures (−1 cm) by 1.4 °C, while fleeces warmed soils during that period by 1 °C and increased spring temperatures by 1.1 °C. Summer bacteria and collembola communities were sampled from within-circle locations differing in vegetation abundance and soil properties.

Two years of winter warming had no effects on either decomposer community. Instead, their community compositions were strongly determined by sampling location: communities in barren circle centres were distinct from those in vegetated outer rims, while communities in sparsely vegetated patches of circle centres were intermediate. Diversity patterns indicate that collembola communities are tightly linked to plant presence while bacteria communities correlated with soil properties.

Our results thus suggest that direct effects of short-term winter warming are likely to be minimal, but that vegetation encroachment on barren cryoturbated ground will affect decomposer community composition substantially. At decadal timescales, collembola community changes may follow relatively fast after warming-driven plant establishment into barren areas, whereas bacteria communities may take longer to respond. If shifts in decomposer community composition are indicative for changes in their activity, vegetation overgrowth will likely have much stronger effects on soil functioning in frost-affected tundra than short-term winter warming.

Ort, förlag, år, upplaga, sidor
Elsevier , 2019. Vol. 138, artikel-id UNSP 107569
Nyckelord [en]
Arctic, Global warming, Microbes, Snow, Shrub encroachment, Soil fauna
Nationell ämneskategori
Ekologi
Identifikatorer
URN: urn:nbn:se:polar:diva-8397DOI: 10.1016/j.soilbio.2019.107569ISI: 000495519900007OAI: oai:DiVA.org:polar-8397DiVA, id: diva2:1396093
Forskningsfinansiär
Vetenskapsrådet, 621-2011-5444Forskningsrådet Formas, 2017-01182Forskningsrådet Formas, 214-2011-788Wallenbergstiftelserna, 2012.0152Tillgänglig från: 2020-02-25 Skapad: 2020-02-25 Senast uppdaterad: 2020-02-25Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltextFulltext

Sök vidare i DiVA

Av författaren/redaktören
Krab, Eveline JMonteux, SylvainDorrepaal, Ellen
I samma tidskrift
Soil Biology and Biochemistry
Ekologi

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 88 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf