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- Kristensen, Jeppe A.Lund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science (author)
The biogeochemical consequences of litter transformation by insect herbivory in the Subarctic : a microcosm simulation experiment
- Article/chapterEnglish2018
Publisher, publication year, extent ...
- 2018-05-05
- Springer,2018
- electronicrdacarrier
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- LIBRIS-ID:oai:DiVA.org:umu-149026
- https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-149026URI
- https://doi.org/10.1007/s10533-018-0448-8DOI
- https://lup.lub.lu.se/record/b0cd4749-263d-4b29-bfdb-38358ef2867dURI
Supplementary language notes
- Language:English
- Summary in:English
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Notes
- Correction: Kristensen, J.A., Metcalfe, D.B., Rousk, J. The biogeochemical consequences of litter transformation by insect herbivory in the Subarctic: a microcosm simulation experiment. Biogeochemistry. 2018;138:337. https://doi.org/10.1007/s10533-018-0451-0
- Warming may increase the extent and intensity of insect defoliations within Arctic ecosystems. A thorough understanding of the implications of this for litter decomposition is essential to make predictions of soil-atmosphere carbon (C) feedbacks. Soil nitrogen (N) and C cycles naturally are interlinked, but we lack a detailed understanding of how insect herbivores impact these cycles. In a laboratory microcosm study, we investigated the growth responses of heterotrophic soil fungi and bacteria as well as C and N mineralisation to simulated defoliator outbreaks (frass addition), long-term increased insect herbivory (litter addition at higher background N-level) and non-outbreak conditions (litter addition only) in soils from a Subarctic birch forest. Larger amounts of the added organic matter were mineralised in the outbreak simulations compared to a normal year; yet, the fungal and bacterial growth rates and biomass were not significantly different. In the simulation of long-term increased herbivory, less litter C was respired per unit mineralised N (C:N of mineralisation decreased to 20 +/- 1 from 38 +/- 3 for pure litter), which suggests a directed microbial mining for N-rich substrates. This was accompanied by higher fungal dominance relative to bacteria and lower total microbial biomass. In conclusion, while a higher fraction of foliar C will be respired by insects and microbes during outbreak years, predicted long-term increases in herbivory linked to climate change may facilitate soil C-accumulation, as less foliar C is respired per unit mineralised N. Further work elucidating animal-plant-soil interactions is needed to improve model predictions of C-sink capacity in high latitude forest ecosystems.
Subject headings and genre
- NATURVETENSKAP Biologi Ekologi hsv//swe
- NATURAL SCIENCES Biological Sciences Ecology hsv//eng
- NATURVETENSKAP Geovetenskap och miljövetenskap Multidisciplinär geovetenskap hsv//swe
- NATURAL SCIENCES Earth and Related Environmental Sciences Geosciences, Multidisciplinary hsv//eng
- Subarctic birch forest
- soil respiration
- nitrogen mineralisation
- soil microbial ecology
- herbivory
- biogeochemistry
- Biogeochemistry
- Herbivory
- Nitrogen mineralisation
- Soil microbial ecology
- Soil respiration
- Subarctic birch forest
Added entries (persons, corporate bodies, meetings, titles ...)
- Metcalfe, Daniel B.Umeå University,Lund University,Lunds universitet,Umeå universitet,Institutionen för ekologi, miljö och geovetenskap,Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science(Swepub:lu)nate-dma (author)
- Rousk, JohannesLund University,Lunds universitet,MEMEG,Biologiska institutionen,Naturvetenskapliga fakulteten,Mikrobiologisk ekologi,Forskargrupper vid Lunds universitet,Department of Biology,Faculty of Science,Microbial Ecology,Lund University Research Groups(Swepub:lu)mbio-jnr (author)
- Institutionen för naturgeografi och ekosystemvetenskapNaturvetenskapliga fakulteten (creator_code:org_t)
Related titles
- In:Biogeochemistry: Springer138:3, s. 323-3360168-25631573-515X
Internet link
- https://doi.org/10.1007/s10533-018-0448-8Fulltext
- https://umu.diva-portal.org/smash/get/diva2:1218693/FULLTEXT01.pdffulltext:print
- https://link.springer.com/content/pdf/10.1007/s10533-018-0448-8.pdf
- http://dx.doi.org/10.1007/s10533-018-0448-8FULLTEXT
- https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-149026
- https://doi.org/10.1007/s10533-018-0448-8
- https://lup.lub.lu.se/record/b0cd4749-263d-4b29-bfdb-38358ef2867d
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