Modeling carbon dynamics in two adjacent spruce forests with different soil conditions in Russia
International audience Net ecosystem carbon exchange (NEE) were measured with eddy covariance method for two adjacent forests located at the southern boundary of European taiga in Russia in 1999?2004. The two spruce forests shared similar vegetation composition but differed in soil conditions. The w...
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ftinsu:oai:HAL:hal-00297963v1 2023-11-12T04:27:11+01:00 Modeling carbon dynamics in two adjacent spruce forests with different soil conditions in Russia Kurbatova, J. Li, C. Varlagin, A. Xiao, X. Vygodskaya, N. A.N. Severtsov Institute of Ecology and Evolution Russian Academy of Sciences Moscow (RAS) Institute for Study of Earth, Oceans and Space University of New Hampshire (UNH) 2008-01-24 https://hal.science/hal-00297963 https://hal.science/hal-00297963/document https://hal.science/hal-00297963/file/bgd-5-271-2008.pdf en eng HAL CCSD European Geosciences Union hal-00297963 https://hal.science/hal-00297963 https://hal.science/hal-00297963/document https://hal.science/hal-00297963/file/bgd-5-271-2008.pdf info:eu-repo/semantics/OpenAccess ISSN: 1810-6277 EISSN: 1810-6285 Biogeosciences Discussions https://hal.science/hal-00297963 Biogeosciences Discussions, 2008, 5 (1), pp.271-296 [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2008 ftinsu 2023-10-25T16:28:21Z International audience Net ecosystem carbon exchange (NEE) were measured with eddy covariance method for two adjacent forests located at the southern boundary of European taiga in Russia in 1999?2004. The two spruce forests shared similar vegetation composition but differed in soil conditions. The wet spruce forest (WSF) possessed a thick peat layer (60 cm) with a high water table seasonally close to or above the soil surface. The dry spruce forest (DSF) had a relatively thin organic layer (5 cm) with a deep water table (>60 cm). The measured NEE fluxes (2000 and ?1440 kg C ha ?1 yr ?1 for WSF and DSF, respectively) indicated that WSF was a source while DSF a sink of atmospheric carbon dioxide during the experimental years. A process-based model, Forest-DNDC, was employed in the study to interpret the observations. The modeled NEE fluxes were 1800 and ?2200 kg C ha ?1 yr ?1 for WSF and DSF, respectively, which were comparable with the observations. The modeled data indicated that WSF and DSF had similar rates of photosynthesis and plant autotrophic respiration but differed in soil heterotrophic respiration. The simulations resulted in a hypothesis that the water table fluctuation at WSF could play a key role in determining the negative C balance in the ecosystem. A sensitivity test was conducted by running Forest-DNDC with varied water table scenarios for WSF. The results proved that the NEE fluxes from WSF were highly sensitive to the water table depth. When the water table dropped, the length of flooding season became shorter and more organic matter in the soil profile suffered from rapid decomposition that converted the ecosystem into a source atmospheric C. The conclusion from this modeling study could be applicable for a wide range of wetland and forest ecosystems that have accumulated soil organic C while face hydrological changes under certain climatic or land-use change scenarios. Article in Journal/Newspaper taiga Institut national des sciences de l'Univers: HAL-INSU |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Kurbatova, J. Li, C. Varlagin, A. Xiao, X. Vygodskaya, N. Modeling carbon dynamics in two adjacent spruce forests with different soil conditions in Russia |
topic_facet |
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Net ecosystem carbon exchange (NEE) were measured with eddy covariance method for two adjacent forests located at the southern boundary of European taiga in Russia in 1999?2004. The two spruce forests shared similar vegetation composition but differed in soil conditions. The wet spruce forest (WSF) possessed a thick peat layer (60 cm) with a high water table seasonally close to or above the soil surface. The dry spruce forest (DSF) had a relatively thin organic layer (5 cm) with a deep water table (>60 cm). The measured NEE fluxes (2000 and ?1440 kg C ha ?1 yr ?1 for WSF and DSF, respectively) indicated that WSF was a source while DSF a sink of atmospheric carbon dioxide during the experimental years. A process-based model, Forest-DNDC, was employed in the study to interpret the observations. The modeled NEE fluxes were 1800 and ?2200 kg C ha ?1 yr ?1 for WSF and DSF, respectively, which were comparable with the observations. The modeled data indicated that WSF and DSF had similar rates of photosynthesis and plant autotrophic respiration but differed in soil heterotrophic respiration. The simulations resulted in a hypothesis that the water table fluctuation at WSF could play a key role in determining the negative C balance in the ecosystem. A sensitivity test was conducted by running Forest-DNDC with varied water table scenarios for WSF. The results proved that the NEE fluxes from WSF were highly sensitive to the water table depth. When the water table dropped, the length of flooding season became shorter and more organic matter in the soil profile suffered from rapid decomposition that converted the ecosystem into a source atmospheric C. The conclusion from this modeling study could be applicable for a wide range of wetland and forest ecosystems that have accumulated soil organic C while face hydrological changes under certain climatic or land-use change scenarios. |
author2 |
A.N. Severtsov Institute of Ecology and Evolution Russian Academy of Sciences Moscow (RAS) Institute for Study of Earth, Oceans and Space University of New Hampshire (UNH) |
format |
Article in Journal/Newspaper |
author |
Kurbatova, J. Li, C. Varlagin, A. Xiao, X. Vygodskaya, N. |
author_facet |
Kurbatova, J. Li, C. Varlagin, A. Xiao, X. Vygodskaya, N. |
author_sort |
Kurbatova, J. |
title |
Modeling carbon dynamics in two adjacent spruce forests with different soil conditions in Russia |
title_short |
Modeling carbon dynamics in two adjacent spruce forests with different soil conditions in Russia |
title_full |
Modeling carbon dynamics in two adjacent spruce forests with different soil conditions in Russia |
title_fullStr |
Modeling carbon dynamics in two adjacent spruce forests with different soil conditions in Russia |
title_full_unstemmed |
Modeling carbon dynamics in two adjacent spruce forests with different soil conditions in Russia |
title_sort |
modeling carbon dynamics in two adjacent spruce forests with different soil conditions in russia |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.science/hal-00297963 https://hal.science/hal-00297963/document https://hal.science/hal-00297963/file/bgd-5-271-2008.pdf |
genre |
taiga |
genre_facet |
taiga |
op_source |
ISSN: 1810-6277 EISSN: 1810-6285 Biogeosciences Discussions https://hal.science/hal-00297963 Biogeosciences Discussions, 2008, 5 (1), pp.271-296 |
op_relation |
hal-00297963 https://hal.science/hal-00297963 https://hal.science/hal-00297963/document https://hal.science/hal-00297963/file/bgd-5-271-2008.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782340881964072960 |