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Climate‐related changes of soil characteristics affect bacterial community composition and function of high altitude and latitude lakes

Lakes at high altitude and latitude are typically unproductive ecosystems where external factors outweigh the relative importance of in‐lake processes, making them ideal sentinels of climate change. Climate change is inducing upward vegetation shifts at high altitude and latitude regions that transl...

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Autores principales: Rofner, Carina, Peter, Hannes, Catalán, Núria, Drewes, Fabian, Sommaruga, Ruben, Pérez, María Teresa
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5434934/
https://www.ncbi.nlm.nih.gov/pubmed/27801530
http://dx.doi.org/10.1111/gcb.13545
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author Rofner, Carina
Peter, Hannes
Catalán, Núria
Drewes, Fabian
Sommaruga, Ruben
Pérez, María Teresa
author_facet Rofner, Carina
Peter, Hannes
Catalán, Núria
Drewes, Fabian
Sommaruga, Ruben
Pérez, María Teresa
author_sort Rofner, Carina
collection PubMed
description Lakes at high altitude and latitude are typically unproductive ecosystems where external factors outweigh the relative importance of in‐lake processes, making them ideal sentinels of climate change. Climate change is inducing upward vegetation shifts at high altitude and latitude regions that translate into changes in the pools of soil organic matter. Upon mobilization, this allochthonous organic matter may rapidly alter the composition and function of lake bacterial communities. Here, we experimentally simulate this potential climate‐change effect by exposing bacterioplankton of two lakes located above the treeline, one in the Alps and one in the subarctic region, to soil organic matter from below and above the treeline. Changes in bacterial community composition, diversity and function were followed for 72 h. In the subarctic lake, soil organic matter from below the treeline reduced bulk and taxon‐specific phosphorus uptake, indicating that bacterial phosphorus limitation was alleviated compared to organic matter from above the treeline. These effects were less pronounced in the alpine lake, suggesting that soil properties (phosphorus and dissolved organic carbon availability) and water temperature further shaped the magnitude of response. The rapid bacterial succession observed in both lakes indicates that certain taxa directly benefited from soil sources. Accordingly, the substrate uptake profiles of initially rare bacteria (copiotrophs) indicated that they are one of the main actors cycling soil‐derived carbon and phosphorus. Our work suggests that climate‐induced changes in soil characteristics affect bacterioplankton community structure and function, and in turn, the cycling of carbon and phosphorus in high altitude and latitude aquatic ecosystems.
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spelling pubmed-54349342017-06-01 Climate‐related changes of soil characteristics affect bacterial community composition and function of high altitude and latitude lakes Rofner, Carina Peter, Hannes Catalán, Núria Drewes, Fabian Sommaruga, Ruben Pérez, María Teresa Glob Chang Biol Primary Research Articles Lakes at high altitude and latitude are typically unproductive ecosystems where external factors outweigh the relative importance of in‐lake processes, making them ideal sentinels of climate change. Climate change is inducing upward vegetation shifts at high altitude and latitude regions that translate into changes in the pools of soil organic matter. Upon mobilization, this allochthonous organic matter may rapidly alter the composition and function of lake bacterial communities. Here, we experimentally simulate this potential climate‐change effect by exposing bacterioplankton of two lakes located above the treeline, one in the Alps and one in the subarctic region, to soil organic matter from below and above the treeline. Changes in bacterial community composition, diversity and function were followed for 72 h. In the subarctic lake, soil organic matter from below the treeline reduced bulk and taxon‐specific phosphorus uptake, indicating that bacterial phosphorus limitation was alleviated compared to organic matter from above the treeline. These effects were less pronounced in the alpine lake, suggesting that soil properties (phosphorus and dissolved organic carbon availability) and water temperature further shaped the magnitude of response. The rapid bacterial succession observed in both lakes indicates that certain taxa directly benefited from soil sources. Accordingly, the substrate uptake profiles of initially rare bacteria (copiotrophs) indicated that they are one of the main actors cycling soil‐derived carbon and phosphorus. Our work suggests that climate‐induced changes in soil characteristics affect bacterioplankton community structure and function, and in turn, the cycling of carbon and phosphorus in high altitude and latitude aquatic ecosystems. John Wiley and Sons Inc. 2016-11-25 2017-06 /pmc/articles/PMC5434934/ /pubmed/27801530 http://dx.doi.org/10.1111/gcb.13545 Text en © 2016 The Authors. Global Change Biology Published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Primary Research Articles
Rofner, Carina
Peter, Hannes
Catalán, Núria
Drewes, Fabian
Sommaruga, Ruben
Pérez, María Teresa
Climate‐related changes of soil characteristics affect bacterial community composition and function of high altitude and latitude lakes
title Climate‐related changes of soil characteristics affect bacterial community composition and function of high altitude and latitude lakes
title_full Climate‐related changes of soil characteristics affect bacterial community composition and function of high altitude and latitude lakes
title_fullStr Climate‐related changes of soil characteristics affect bacterial community composition and function of high altitude and latitude lakes
title_full_unstemmed Climate‐related changes of soil characteristics affect bacterial community composition and function of high altitude and latitude lakes
title_short Climate‐related changes of soil characteristics affect bacterial community composition and function of high altitude and latitude lakes
title_sort climate‐related changes of soil characteristics affect bacterial community composition and function of high altitude and latitude lakes
topic Primary Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5434934/
https://www.ncbi.nlm.nih.gov/pubmed/27801530
http://dx.doi.org/10.1111/gcb.13545
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