Treeline displacement may affect lake dissolved organic matter processing at high latitudes and altitudes
Abstract Climate change is causing a rapid shift in treeline position, both towards higher altitudes and latitudes 1 inducing changes in soil properties such as organic matter content and composition 2 . Eventually, soil-derived organic matter is transported to alpine and subarctic lakes with yet un...
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Online Access: | https://hal.science/hal-04310042 https://doi.org/10.21203/rs.3.rs-2922555/v1 |
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ftceafr:oai:HAL:hal-04310042v1 2024-02-11T10:08:59+01:00 Treeline displacement may affect lake dissolved organic matter processing at high latitudes and altitudes Peter, Hannes Catalán, Núria Rofner, Carina Perez, Maria Teresa Dittmar, Thorsten Tranvik, Lars Sommaruga, Ruben Verpoorter, Charles Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) Université du Littoral Côte d'Opale (ULCO) 2023-06-27 https://hal.science/hal-04310042 https://doi.org/10.21203/rs.3.rs-2922555/v1 en eng HAL CCSD Springer Nature info:eu-repo/semantics/altIdentifier/doi/10.21203/rs.3.rs-2922555/v1 hal-04310042 https://hal.science/hal-04310042 doi:10.21203/rs.3.rs-2922555/v1 Nature Portfolio https://hal.science/hal-04310042 Nature Portfolio, 2023, ⟨10.21203/rs.3.rs-2922555/v1⟩ [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2023 ftceafr https://doi.org/10.21203/rs.3.rs-2922555/v1 2024-01-24T17:29:12Z Abstract Climate change is causing a rapid shift in treeline position, both towards higher altitudes and latitudes 1 inducing changes in soil properties such as organic matter content and composition 2 . Eventually, soil-derived organic matter is transported to alpine and subarctic lakes with yet unknown consequences for dissolved organic matter diversity and processing. Here, we experimentally investigated the consequences of treeline shifts by amending subarctic and temperate alpine lake water with soil-derived dissolved organic matter (DOM) from above and below the treeline. We used ultra-high resolution mass spectrometry (FT-IR MS) to track molecular DOM diversity (i.e., chemodiversity), estimated DOM decay and measured bacterial growth efficiency. In both lakes, soil-derived DOM from below the treeline increased DOM chemodiversity mainly through the enrichment with novel polyphenolic and highly unsaturated compounds. These compositional changes were associated with reduced overall and compound-level DOM reactivity and reduced bacterial growth efficiency. Our results suggest that treeline advancement has the potential to enrich a large number of lake ecosystems with less biodegradable DOM, affecting bacterial community function and potentially altering the biogeochemical cycling of carbon in lakes at high latitudes and altitudes. Article in Journal/Newspaper Subarctic HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Alpine Lake ENVELOPE(-129.182,-129.182,55.529,55.529) |
institution |
Open Polar |
collection |
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
op_collection_id |
ftceafr |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences Peter, Hannes Catalán, Núria Rofner, Carina Perez, Maria Teresa Dittmar, Thorsten Tranvik, Lars Sommaruga, Ruben Verpoorter, Charles Treeline displacement may affect lake dissolved organic matter processing at high latitudes and altitudes |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
Abstract Climate change is causing a rapid shift in treeline position, both towards higher altitudes and latitudes 1 inducing changes in soil properties such as organic matter content and composition 2 . Eventually, soil-derived organic matter is transported to alpine and subarctic lakes with yet unknown consequences for dissolved organic matter diversity and processing. Here, we experimentally investigated the consequences of treeline shifts by amending subarctic and temperate alpine lake water with soil-derived dissolved organic matter (DOM) from above and below the treeline. We used ultra-high resolution mass spectrometry (FT-IR MS) to track molecular DOM diversity (i.e., chemodiversity), estimated DOM decay and measured bacterial growth efficiency. In both lakes, soil-derived DOM from below the treeline increased DOM chemodiversity mainly through the enrichment with novel polyphenolic and highly unsaturated compounds. These compositional changes were associated with reduced overall and compound-level DOM reactivity and reduced bacterial growth efficiency. Our results suggest that treeline advancement has the potential to enrich a large number of lake ecosystems with less biodegradable DOM, affecting bacterial community function and potentially altering the biogeochemical cycling of carbon in lakes at high latitudes and altitudes. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) Université du Littoral Côte d'Opale (ULCO) |
format |
Article in Journal/Newspaper |
author |
Peter, Hannes Catalán, Núria Rofner, Carina Perez, Maria Teresa Dittmar, Thorsten Tranvik, Lars Sommaruga, Ruben Verpoorter, Charles |
author_facet |
Peter, Hannes Catalán, Núria Rofner, Carina Perez, Maria Teresa Dittmar, Thorsten Tranvik, Lars Sommaruga, Ruben Verpoorter, Charles |
author_sort |
Peter, Hannes |
title |
Treeline displacement may affect lake dissolved organic matter processing at high latitudes and altitudes |
title_short |
Treeline displacement may affect lake dissolved organic matter processing at high latitudes and altitudes |
title_full |
Treeline displacement may affect lake dissolved organic matter processing at high latitudes and altitudes |
title_fullStr |
Treeline displacement may affect lake dissolved organic matter processing at high latitudes and altitudes |
title_full_unstemmed |
Treeline displacement may affect lake dissolved organic matter processing at high latitudes and altitudes |
title_sort |
treeline displacement may affect lake dissolved organic matter processing at high latitudes and altitudes |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-04310042 https://doi.org/10.21203/rs.3.rs-2922555/v1 |
long_lat |
ENVELOPE(-129.182,-129.182,55.529,55.529) |
geographic |
Alpine Lake |
geographic_facet |
Alpine Lake |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Nature Portfolio https://hal.science/hal-04310042 Nature Portfolio, 2023, ⟨10.21203/rs.3.rs-2922555/v1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.21203/rs.3.rs-2922555/v1 hal-04310042 https://hal.science/hal-04310042 doi:10.21203/rs.3.rs-2922555/v1 |
op_doi |
https://doi.org/10.21203/rs.3.rs-2922555/v1 |
_version_ |
1790608658499895296 |