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Contribution of mic...
Contribution of microbial photosynthesis to peatland carbon uptake along a latitudinal gradient
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- Hamard, Samuel (author)
- Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, UPS, CNRS, Toulouse, France
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- Céréghino, Regis (author)
- Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, UPS, CNRS, Toulouse, France
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- Barret, Maialen (author)
- Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, UPS, CNRS, Toulouse, France
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- Sytiuk, Anna (author)
- Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, UPS, CNRS, Toulouse, France
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- Lara, Enrique (author)
- Real Jardín Botánico de Madrid, CSIC, Madrid, Spain
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- Dorrepaal, Ellen (author)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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- Kardol, Paul (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management
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- Kuttim, Martin (author)
- Institute of Ecology, School of Natural Sciences and Health, Tallinn University, Tallinn, Estonia
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- Lamentowicz, Mariusz (author)
- Climate Change Ecology Research Unit, Faculty of Geographical and Geological Sciences, Adam Mickiewicz University in Poznan, Poznan, Poland
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- Leflaive, Joséphine (author)
- Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, UPS, CNRS, Toulouse, France
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- Le Roux, Gaël (author)
- Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, UPS, CNRS, Toulouse, France
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- Tuittila, Eeva-Stiina (author)
- School of Forest Sciences, University of Eastern Finland, Joensuu, Finland
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- Jassey, Vincent E. J. (author)
- Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, UPS, CNRS, Toulouse, France
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(creator_code:org_t)
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- 2021-07-12
- 2021
- English.
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In: Journal of Ecology. - : British Ecological Society. - 0022-0477 .- 1365-2745. ; 109:9, s. 3424-3441
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- Phototrophic microbes, also known as micro-algae, display a high abundance in many terrestrial surface soils. They contribute to atmospheric carbon dioxide fluxes through their photosynthesis, and thus regulate climate similar to plants. However, microbial photosynthesis remains overlooked in most terrestrial ecosystems. Here, we hypothesise that phototrophic microbes significantly contribute to peatland C uptake, unless environmental conditions limit their development and their photosynthetic activity. To test our hypothesis, we studied phototrophic microbial communities in five peatlands distributed along a latitudinal gradient in Europe. By means of metabarcoding, microscopy and cytometry analyses, as well as measures of photosynthesis, we investigated the diversity, absolute abundance and photosynthetic rates of the phototrophic microbial communities. We identified 351 photosynthetic prokaryotic and eukaryotic operational taxonomic units (OTUs) across the five peatlands. We found that water availability and plant composition were important determinants of the composition and the structure of phototrophic microbial communities. Despite environmental shifts in community structure and composition, we showed that microbial C fixation rates remained similar along the latitudinal gradient. Our results further revealed that phototrophic microbes accounted for approximately 10% of peatland C uptake. Synthesis. Our findings show that phototrophic microbes are extremely diverse and abundant in peatlands. While species turnover with environmental conditions, microbial photosynthesis similarly contributed to peatland C uptake at all latitudes. We estimate that phototrophic microbes take up around 75 MT CO2 per year in northern peatlands. This amount roughly equals the magnitude of projected peatland C loss due to climate warming and highlights the importance of phototrophic microbes for the peatland C cycle.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Keyword
- algae
- carbon cycle
- metabarcoding
- microbial diversity
- peatland
- photosynthesis
- phototrophs
- primary productivity
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Hamard, Samuel
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Céréghino, Regis
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Barret, Maialen
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Sytiuk, Anna
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Lara, Enrique
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Dorrepaal, Ellen
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show more...
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Kardol, Paul
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Kuttim, Martin
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Lamentowicz, Mar ...
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Leflaive, Joséph ...
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Le Roux, Gaël
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Tuittila, Eeva-S ...
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Jassey, Vincent ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Environmental Sc ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Ecology
- Articles in the publication
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Journal of Ecolo ...
- By the university
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Umeå University
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Swedish University of Agricultural Sciences