SHIMMER (1.0): a novel mathematical model for microbial and biogeochemical dynamics in glacier forefield ecosystems
International audience Abstract. SHIMMER (Soil biogeocHemIcal Model for Microbial Ecosystem Response) is a new numerical modelling framework designed to simulate microbial dynamics and biogeochemical cycling during initial ecosystem development in glacier forefield soils. However, it is also transfe...
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Online Access: | https://hal.science/hal-04450531 https://hal.science/hal-04450531/document https://hal.science/hal-04450531/file/gmd-8-3441-2015.pdf https://doi.org/10.5194/gmd-8-3441-2015 |
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ftunivtoulon:oai:HAL:hal-04450531v1 2024-09-15T18:08:01+00:00 SHIMMER (1.0): a novel mathematical model for microbial and biogeochemical dynamics in glacier forefield ecosystems Bradley, J. Anesio, A. Singarayer, J. Heath, M. Arndt, S. Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) Queen Mary University of London (QMUL) 2015-10-28 https://hal.science/hal-04450531 https://hal.science/hal-04450531/document https://hal.science/hal-04450531/file/gmd-8-3441-2015.pdf https://doi.org/10.5194/gmd-8-3441-2015 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/gmd-8-3441-2015 hal-04450531 https://hal.science/hal-04450531 https://hal.science/hal-04450531/document https://hal.science/hal-04450531/file/gmd-8-3441-2015.pdf doi:10.5194/gmd-8-3441-2015 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1991-9603 EISSN: 1991-959X Geoscientific Model Development https://hal.science/hal-04450531 Geoscientific Model Development, 2015, 8 (10), pp.3441-3470. ⟨10.5194/gmd-8-3441-2015⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2015 ftunivtoulon https://doi.org/10.5194/gmd-8-3441-2015 2024-07-29T23:40:25Z International audience Abstract. SHIMMER (Soil biogeocHemIcal Model for Microbial Ecosystem Response) is a new numerical modelling framework designed to simulate microbial dynamics and biogeochemical cycling during initial ecosystem development in glacier forefield soils. However, it is also transferable to other extreme ecosystem types (such as desert soils or the surface of glaciers). The rationale for model development arises from decades of empirical observations in glacier forefields, and enables a quantitative and process focussed approach. Here, we provide a detailed description of SHIMMER, test its performance in two case study forefields: the Damma Glacier (Switzerland) and the Athabasca Glacier (Canada) and analyse sensitivity to identify the most sensitive and unconstrained model parameters. Results show that the accumulation of microbial biomass is highly dependent on variation in microbial growth and death rate constants, Q10 values, the active fraction of microbial biomass and the reactivity of organic matter. The model correctly predicts the rapid accumulation of microbial biomass observed during the initial stages of succession in the forefields of both the case study systems. Primary production is responsible for the initial build-up of labile substrate that subsequently supports heterotrophic growth. However, allochthonous contributions of organic matter, and nitrogen fixation, are important in sustaining this productivity. The development and application of SHIMMER also highlights aspects of these systems that require further empirical research: quantifying nutrient budgets and biogeochemical rates, exploring seasonality and microbial growth and cell death. This will lead to increased understanding of how glacier forefields contribute to global biogeochemical cycling and climate under future ice retreat. Article in Journal/Newspaper glacier* Université de Toulon: HAL Geoscientific Model Development 8 10 3441 3470 |
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Open Polar |
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Université de Toulon: HAL |
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ftunivtoulon |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Bradley, J. Anesio, A. Singarayer, J. Heath, M. Arndt, S. SHIMMER (1.0): a novel mathematical model for microbial and biogeochemical dynamics in glacier forefield ecosystems |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience Abstract. SHIMMER (Soil biogeocHemIcal Model for Microbial Ecosystem Response) is a new numerical modelling framework designed to simulate microbial dynamics and biogeochemical cycling during initial ecosystem development in glacier forefield soils. However, it is also transferable to other extreme ecosystem types (such as desert soils or the surface of glaciers). The rationale for model development arises from decades of empirical observations in glacier forefields, and enables a quantitative and process focussed approach. Here, we provide a detailed description of SHIMMER, test its performance in two case study forefields: the Damma Glacier (Switzerland) and the Athabasca Glacier (Canada) and analyse sensitivity to identify the most sensitive and unconstrained model parameters. Results show that the accumulation of microbial biomass is highly dependent on variation in microbial growth and death rate constants, Q10 values, the active fraction of microbial biomass and the reactivity of organic matter. The model correctly predicts the rapid accumulation of microbial biomass observed during the initial stages of succession in the forefields of both the case study systems. Primary production is responsible for the initial build-up of labile substrate that subsequently supports heterotrophic growth. However, allochthonous contributions of organic matter, and nitrogen fixation, are important in sustaining this productivity. The development and application of SHIMMER also highlights aspects of these systems that require further empirical research: quantifying nutrient budgets and biogeochemical rates, exploring seasonality and microbial growth and cell death. This will lead to increased understanding of how glacier forefields contribute to global biogeochemical cycling and climate under future ice retreat. |
author2 |
Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) Queen Mary University of London (QMUL) |
format |
Article in Journal/Newspaper |
author |
Bradley, J. Anesio, A. Singarayer, J. Heath, M. Arndt, S. |
author_facet |
Bradley, J. Anesio, A. Singarayer, J. Heath, M. Arndt, S. |
author_sort |
Bradley, J. |
title |
SHIMMER (1.0): a novel mathematical model for microbial and biogeochemical dynamics in glacier forefield ecosystems |
title_short |
SHIMMER (1.0): a novel mathematical model for microbial and biogeochemical dynamics in glacier forefield ecosystems |
title_full |
SHIMMER (1.0): a novel mathematical model for microbial and biogeochemical dynamics in glacier forefield ecosystems |
title_fullStr |
SHIMMER (1.0): a novel mathematical model for microbial and biogeochemical dynamics in glacier forefield ecosystems |
title_full_unstemmed |
SHIMMER (1.0): a novel mathematical model for microbial and biogeochemical dynamics in glacier forefield ecosystems |
title_sort |
shimmer (1.0): a novel mathematical model for microbial and biogeochemical dynamics in glacier forefield ecosystems |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-04450531 https://hal.science/hal-04450531/document https://hal.science/hal-04450531/file/gmd-8-3441-2015.pdf https://doi.org/10.5194/gmd-8-3441-2015 |
genre |
glacier* |
genre_facet |
glacier* |
op_source |
ISSN: 1991-9603 EISSN: 1991-959X Geoscientific Model Development https://hal.science/hal-04450531 Geoscientific Model Development, 2015, 8 (10), pp.3441-3470. ⟨10.5194/gmd-8-3441-2015⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/gmd-8-3441-2015 hal-04450531 https://hal.science/hal-04450531 https://hal.science/hal-04450531/document https://hal.science/hal-04450531/file/gmd-8-3441-2015.pdf doi:10.5194/gmd-8-3441-2015 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/gmd-8-3441-2015 |
container_title |
Geoscientific Model Development |
container_volume |
8 |
container_issue |
10 |
container_start_page |
3441 |
op_container_end_page |
3470 |
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1810445368345755648 |