A simulation of the importance of length of growing season and canopy functional properties on the seasonal gross primary production of temperate alpine meadows
International audience Background and Aims Along snowmelt gradients, the canopies of temperate alpine meadows differ strongly in their structural and biochemical properties. Here, a study is made of the effects of these canopy dissimilarities combined with the snow-induced changes in length of growi...
Published in: | Annals of Botany |
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Online Access: | https://hal.science/halsde-00281683 https://doi.org/10.1093/aob/mcm318 |
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ftunivnantes:oai:HAL:halsde-00281683v1 2023-05-15T15:18:50+02:00 A simulation of the importance of length of growing season and canopy functional properties on the seasonal gross primary production of temperate alpine meadows Baptist, F. Choler, P. Laboratoire d'Ecologie Alpine (LECA) Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Station alpine Joseph Fourier - UMS 3370 (SAJF) Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS) 2008 https://hal.science/halsde-00281683 https://doi.org/10.1093/aob/mcm318 en eng HAL CCSD Oxford University Press (OUP) info:eu-repo/semantics/altIdentifier/doi/10.1093/aob/mcm318 halsde-00281683 https://hal.science/halsde-00281683 doi:10.1093/aob/mcm318 PUBMEDCENTRAL: PMC2710193 ISSN: 0305-7364 EISSN: 1095-8290 Annals of Botany https://hal.science/halsde-00281683 Annals of Botany, 2008, 101 (4), pp.549-559. ⟨10.1093/aob/mcm318⟩ alpine meadows gross primary production plant functional traits snowmelt gradient sun-shade model Carbon-dioxide arctic tundra gas-exchange nitrogen distribution plant traits elevated co2 leaf angle ecosystem photosynthesis grassland [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BID]Life Sciences [q-bio]/Biodiversity [SDV.EE]Life Sciences [q-bio]/Ecology environment info:eu-repo/semantics/article Journal articles 2008 ftunivnantes https://doi.org/10.1093/aob/mcm318 2023-02-08T05:49:13Z International audience Background and Aims Along snowmelt gradients, the canopies of temperate alpine meadows differ strongly in their structural and biochemical properties. Here, a study is made of the effects of these canopy dissimilarities combined with the snow-induced changes in length of growing season on seasonal gross primary production (GPP). Methods Leaf area index (LAI) and community-aggregated values of leaf angle and leaf nitrogen content were estimated for seven alpine plant canopies distributed along a marked snowmelt gradient, and these were used as input variables in a sun-shade canopy bulk-photosynthesis model. The model was validated for plant communities of early and late snowmelt sites by measuring the instantaneous CO2 fluxes with a canopy closed-chamber technique. A sensitivity analysis was conducted to estimate the relative impact of canopy properties and environmental factors on the daily and seasonal GPP. Key Results Carbon uptake was primarily related to the LAI and total canopy nitrogen content, but not to the leaf angle. For a given level of photosynthetically active radiation, CO2 assimilation was higher under overcast conditions. Sensitivity analysis revealed that increase of the length of the growing season had a higher effect on the seasonal GPP than a similar increase of any other factor. It was also found that the observed greater nitrogen content and larger LAI of canopies in late-snowmelt sites largely compensated for the negative impact of the reduced growing season. Conclusions The results emphasize the primary importance of snow-induced changes in length of growing season on carbon uptake in alpine temperate meadows. It was also demonstrated how using leaf-trait values of the dominants is a useful approach for modelling ecosystem carbon-cycle-related processes, particularly when continuous measurements of CO2 fluxes are technically difficult. The study thus represents an important step in addressing the challenge of using a plant functional-trait approach for ... Article in Journal/Newspaper Arctic Tundra Université de Nantes: HAL-UNIV-NANTES Arctic Annals of Botany 101 4 549 559 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
alpine meadows gross primary production plant functional traits snowmelt gradient sun-shade model Carbon-dioxide arctic tundra gas-exchange nitrogen distribution plant traits elevated co2 leaf angle ecosystem photosynthesis grassland [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BID]Life Sciences [q-bio]/Biodiversity [SDV.EE]Life Sciences [q-bio]/Ecology environment |
spellingShingle |
alpine meadows gross primary production plant functional traits snowmelt gradient sun-shade model Carbon-dioxide arctic tundra gas-exchange nitrogen distribution plant traits elevated co2 leaf angle ecosystem photosynthesis grassland [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BID]Life Sciences [q-bio]/Biodiversity [SDV.EE]Life Sciences [q-bio]/Ecology environment Baptist, F. Choler, P. A simulation of the importance of length of growing season and canopy functional properties on the seasonal gross primary production of temperate alpine meadows |
topic_facet |
alpine meadows gross primary production plant functional traits snowmelt gradient sun-shade model Carbon-dioxide arctic tundra gas-exchange nitrogen distribution plant traits elevated co2 leaf angle ecosystem photosynthesis grassland [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BID]Life Sciences [q-bio]/Biodiversity [SDV.EE]Life Sciences [q-bio]/Ecology environment |
description |
International audience Background and Aims Along snowmelt gradients, the canopies of temperate alpine meadows differ strongly in their structural and biochemical properties. Here, a study is made of the effects of these canopy dissimilarities combined with the snow-induced changes in length of growing season on seasonal gross primary production (GPP). Methods Leaf area index (LAI) and community-aggregated values of leaf angle and leaf nitrogen content were estimated for seven alpine plant canopies distributed along a marked snowmelt gradient, and these were used as input variables in a sun-shade canopy bulk-photosynthesis model. The model was validated for plant communities of early and late snowmelt sites by measuring the instantaneous CO2 fluxes with a canopy closed-chamber technique. A sensitivity analysis was conducted to estimate the relative impact of canopy properties and environmental factors on the daily and seasonal GPP. Key Results Carbon uptake was primarily related to the LAI and total canopy nitrogen content, but not to the leaf angle. For a given level of photosynthetically active radiation, CO2 assimilation was higher under overcast conditions. Sensitivity analysis revealed that increase of the length of the growing season had a higher effect on the seasonal GPP than a similar increase of any other factor. It was also found that the observed greater nitrogen content and larger LAI of canopies in late-snowmelt sites largely compensated for the negative impact of the reduced growing season. Conclusions The results emphasize the primary importance of snow-induced changes in length of growing season on carbon uptake in alpine temperate meadows. It was also demonstrated how using leaf-trait values of the dominants is a useful approach for modelling ecosystem carbon-cycle-related processes, particularly when continuous measurements of CO2 fluxes are technically difficult. The study thus represents an important step in addressing the challenge of using a plant functional-trait approach for ... |
author2 |
Laboratoire d'Ecologie Alpine (LECA) Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Station alpine Joseph Fourier - UMS 3370 (SAJF) Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Baptist, F. Choler, P. |
author_facet |
Baptist, F. Choler, P. |
author_sort |
Baptist, F. |
title |
A simulation of the importance of length of growing season and canopy functional properties on the seasonal gross primary production of temperate alpine meadows |
title_short |
A simulation of the importance of length of growing season and canopy functional properties on the seasonal gross primary production of temperate alpine meadows |
title_full |
A simulation of the importance of length of growing season and canopy functional properties on the seasonal gross primary production of temperate alpine meadows |
title_fullStr |
A simulation of the importance of length of growing season and canopy functional properties on the seasonal gross primary production of temperate alpine meadows |
title_full_unstemmed |
A simulation of the importance of length of growing season and canopy functional properties on the seasonal gross primary production of temperate alpine meadows |
title_sort |
simulation of the importance of length of growing season and canopy functional properties on the seasonal gross primary production of temperate alpine meadows |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.science/halsde-00281683 https://doi.org/10.1093/aob/mcm318 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Tundra |
genre_facet |
Arctic Tundra |
op_source |
ISSN: 0305-7364 EISSN: 1095-8290 Annals of Botany https://hal.science/halsde-00281683 Annals of Botany, 2008, 101 (4), pp.549-559. ⟨10.1093/aob/mcm318⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1093/aob/mcm318 halsde-00281683 https://hal.science/halsde-00281683 doi:10.1093/aob/mcm318 PUBMEDCENTRAL: PMC2710193 |
op_doi |
https://doi.org/10.1093/aob/mcm318 |
container_title |
Annals of Botany |
container_volume |
101 |
container_issue |
4 |
container_start_page |
549 |
op_container_end_page |
559 |
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1766349005831274496 |