Dispersal of bacteria and stimulation of permafrost decomposition by Collembola
Contrary to most soils, permafrost soils have the atypical feature of being almost entirely deprived of soil fauna. Abiotic constraints on the fate of permafrost carbon after thawing are increasingly understood, but biotic constraints remain scarcely investigated. Incubation studies, essential to es...
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ftdoajarticles:oai:doaj.org/article:b18884acac2643ce87062d72d3c2e7f5 2023-05-15T15:15:08+02:00 Dispersal of bacteria and stimulation of permafrost decomposition by Collembola S. Monteux J. Mariën E. J. Krab 2022-09-01T00:00:00Z https://doi.org/10.5194/bg-19-4089-2022 https://doaj.org/article/b18884acac2643ce87062d72d3c2e7f5 EN eng Copernicus Publications https://bg.copernicus.org/articles/19/4089/2022/bg-19-4089-2022.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-19-4089-2022 1726-4170 1726-4189 https://doaj.org/article/b18884acac2643ce87062d72d3c2e7f5 Biogeosciences, Vol 19, Pp 4089-4105 (2022) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2022 ftdoajarticles https://doi.org/10.5194/bg-19-4089-2022 2022-12-30T23:30:25Z Contrary to most soils, permafrost soils have the atypical feature of being almost entirely deprived of soil fauna. Abiotic constraints on the fate of permafrost carbon after thawing are increasingly understood, but biotic constraints remain scarcely investigated. Incubation studies, essential to estimate effects of permafrost thaw on carbon cycling, typically measure the consequences of permafrost thaw in isolation from the topsoil and thus do not account for the effects of altered biotic interactions because of e.g. colonization by soil fauna. Microarthropods facilitate the dispersal of microorganisms in soil, both on their cuticle (ectozoochory) and through their digestive tract (endozoochory), which may be particularly important in permafrost soils, considering that microbial community composition can strongly constrain permafrost biogeochemical processes. Here we tested how a model species of microarthropod (the Collembola Folsomia candida ) affected aerobic CO 2 production of permafrost soil over a 25 d incubation. By using Collembola stock cultures grown on permafrost soil or on an arctic topsoil, we aimed to assess the potential for endo- and ectozoochory of soil bacteria, while cultures grown on gypsum and sprayed with soil suspensions would allow the observation of only ectozoochory. The presence of Collembola introduced bacterial amplicon sequence variants (ASVs) absent in the no-Collembola control, regardless of their microbiome manipulation, when considering presence–absence metrics (unweighted UniFrac metrics), which resulted in increased species richness. However, these introduced ASVs did not induce changes in bacterial community composition as a whole (accounting for relative abundances, weighted UniFrac), which might only become detectable in the longer term. CO 2 production was increased by 25.85 % in the presence of Collembola, about half of which could be attributed to Collembola respiration based on respiration rates measured in the absence of soil. We argue that the rest of the CO 2 being ... Article in Journal/Newspaper Arctic permafrost Directory of Open Access Journals: DOAJ Articles Arctic Biogeosciences 19 17 4089 4105 |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 S. Monteux J. Mariën E. J. Krab Dispersal of bacteria and stimulation of permafrost decomposition by Collembola |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Contrary to most soils, permafrost soils have the atypical feature of being almost entirely deprived of soil fauna. Abiotic constraints on the fate of permafrost carbon after thawing are increasingly understood, but biotic constraints remain scarcely investigated. Incubation studies, essential to estimate effects of permafrost thaw on carbon cycling, typically measure the consequences of permafrost thaw in isolation from the topsoil and thus do not account for the effects of altered biotic interactions because of e.g. colonization by soil fauna. Microarthropods facilitate the dispersal of microorganisms in soil, both on their cuticle (ectozoochory) and through their digestive tract (endozoochory), which may be particularly important in permafrost soils, considering that microbial community composition can strongly constrain permafrost biogeochemical processes. Here we tested how a model species of microarthropod (the Collembola Folsomia candida ) affected aerobic CO 2 production of permafrost soil over a 25 d incubation. By using Collembola stock cultures grown on permafrost soil or on an arctic topsoil, we aimed to assess the potential for endo- and ectozoochory of soil bacteria, while cultures grown on gypsum and sprayed with soil suspensions would allow the observation of only ectozoochory. The presence of Collembola introduced bacterial amplicon sequence variants (ASVs) absent in the no-Collembola control, regardless of their microbiome manipulation, when considering presence–absence metrics (unweighted UniFrac metrics), which resulted in increased species richness. However, these introduced ASVs did not induce changes in bacterial community composition as a whole (accounting for relative abundances, weighted UniFrac), which might only become detectable in the longer term. CO 2 production was increased by 25.85 % in the presence of Collembola, about half of which could be attributed to Collembola respiration based on respiration rates measured in the absence of soil. We argue that the rest of the CO 2 being ... |
format |
Article in Journal/Newspaper |
author |
S. Monteux J. Mariën E. J. Krab |
author_facet |
S. Monteux J. Mariën E. J. Krab |
author_sort |
S. Monteux |
title |
Dispersal of bacteria and stimulation of permafrost decomposition by Collembola |
title_short |
Dispersal of bacteria and stimulation of permafrost decomposition by Collembola |
title_full |
Dispersal of bacteria and stimulation of permafrost decomposition by Collembola |
title_fullStr |
Dispersal of bacteria and stimulation of permafrost decomposition by Collembola |
title_full_unstemmed |
Dispersal of bacteria and stimulation of permafrost decomposition by Collembola |
title_sort |
dispersal of bacteria and stimulation of permafrost decomposition by collembola |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/bg-19-4089-2022 https://doaj.org/article/b18884acac2643ce87062d72d3c2e7f5 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic permafrost |
genre_facet |
Arctic permafrost |
op_source |
Biogeosciences, Vol 19, Pp 4089-4105 (2022) |
op_relation |
https://bg.copernicus.org/articles/19/4089/2022/bg-19-4089-2022.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-19-4089-2022 1726-4170 1726-4189 https://doaj.org/article/b18884acac2643ce87062d72d3c2e7f5 |
op_doi |
https://doi.org/10.5194/bg-19-4089-2022 |
container_title |
Biogeosciences |
container_volume |
19 |
container_issue |
17 |
container_start_page |
4089 |
op_container_end_page |
4105 |
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1766345520796663808 |