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Search: WFRF:(Kaarlejärvi Elina) > (2020-2024) > Removal of grazers ...

  • Ylänne, HenniLund 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 Oulu,University of Lapland (author)

Removal of grazers alters the response of tundra soil carbon to warming and enhanced nitrogen availability

  • Article/chapterEnglish2020

Publisher, publication year, extent ...

  • 2019-12-09
  • Wiley,2020

Numbers

  • LIBRIS-ID:oai:lup.lub.lu.se:ea027102-96f5-4baf-a2af-d01860564ab7
  • https://lup.lub.lu.se/record/ea027102-96f5-4baf-a2af-d01860564ab7URI
  • https://doi.org/10.1002/ecm.1396DOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-166845URI

Supplementary language notes

  • Language:English
  • Summary in:English

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Classification

  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • The circumpolar Arctic is currently facing multiple global changes that have the potential to alter the capacity of tundra soils to store carbon. Yet, predicting changes in soil carbon is hindered by the fact that multiple factors simultaneously control processes sustaining carbon storage and we do not understand how they act in concert. Here, we investigated the effects of warmer temperatures, enhanced soil nitrogen availability, and the combination of these on tundra carbon stocks at three different grazing regimes: on areas with over 50-yr history of either light or heavy reindeer grazing and in 5-yr-old exlosures in the heavily grazed area. In line with earlier reports, warming generally decreased soil carbon stocks. However, our results suggest that the mechanisms by which warming decreases carbon storage depend on grazing intensity: under long-term light grazing soil carbon losses were linked to higher shrub abundance and higher enzymatic activities, whereas under long-term heavy grazing, carbon losses were linked to drier soils and higher enzymatic activities. Importantly, under enhanced soil nitrogen availability, warming did not induce soil carbon losses under either of the long-term grazing regimes, whereas inside exclosures in the heavily grazed area, also the combination of warming and enhanced nutrient availability induced soil carbon loss. Grazing on its own did not influence the soil carbon stocks. These results reveal that accounting for the effect of warming or grazing alone is not sufficient to reliably predict future soil carbon storage in the tundra. Instead, the joint effects of multiple global changes need to be accounted for, with a special focus given to abrupt changes in grazing currently taking place in several parts of the Arctic.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Kaarlejärvi, Elina,1980-Umeå universitet,Umeå University,Department of Biology, Vrije Universiteit Brussel (VUB), Brussel, Belgium,University of Helsinki,Institutionen för ekologi, miljö och geovetenskap,Arcum(Swepub:umu)elka0025 (author)
  • Väisänen, MariaUniversity of Lapland,University of Oulu (author)
  • Männistö, MinnaNatural Resources Institute Finland (Luke) (author)
  • Ahonen, Saija H KUniversity of Oulu (author)
  • Olofsson, JohanUmeå universitet,Umeå University,Institutionen för ekologi, miljö och geovetenskap(Swepub:umu)jool0004 (author)
  • Stark, SariUniversity of Lapland (author)
  • BECC: Biodiversity and Ecosystem services in a Changing ClimateCentrum för miljö- och klimatvetenskap (CEC) (creator_code:org_t)

Related titles

  • In:Ecological Monographs: Wiley90:10012-96151557-7015

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