Assessing the impact of water availability on growth of neotropical trees
Climate modeling scenarios predict deep changes of the rainfall regime in Amazonia for the next century. The expected increase in dry season length would lead to less water availability for trees. Every month during 3 years, growth measurement was recorded for more than 200 neotropical trees. Tree daily water availability during this period was simulated making use of a soil water balance model. Using a bayesian modeling framework, we analysed (i) the effect of water availability on tree growth and (ii) how functional trait modulated tree responses to drought. For most studied species, tree growth was deeply affected by seasonal water availability. Trees exhibited different water stress sensibilities linked to diffeent functional strategies, from a decrease to a stop in radial stem growth during the drought season. Largest increments were observe at the beginning of the rain season. The remaining part of unexplained variance, may be attributed to ressources competition, indiviual phenology, particular history or genetic. Our results suggest that the intensity of the annual dry season have a large impact on annual tree growth. If rainfall reduction is confirmed in the next decades, tree growth, and hence the whole forest dynamic, will undoubtely be modified.
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dig-cirad-fr-5605582022-03-30T14:16:17Z http://agritrop.cirad.fr/560558/ http://agritrop.cirad.fr/560558/ Assessing the impact of water availability on growth of neotropical trees. Wagner Fabien, Hérault Bruno, Stahl Clément, Bonal Damien, Rossi Vivien. 2011. In : Adaptability to climate change and attaining the millennium development goals for tropical ecosystems : 2011 International Joint Meeting of the ATBC and SCB Africa, Arusha, Tanzania, 12-16 June, 2011. ATBC; SCB Africa. s.l. : s.n., Résumé, 1 p. 2011 International Joint Meeting of the ATBC and SCB Africa, Arusha, Tanzanie, 12 Juin 2011/16 Juin 2011. Researchers Assessing the impact of water availability on growth of neotropical trees Wagner, Fabien Hérault, Bruno Stahl, Clément Bonal, Damien Rossi, Vivien eng 2011 s.n. Adaptability to climate change and attaining the millennium development goals for tropical ecosystems : 2011 International Joint Meeting of the ATBC and SCB Africa, Arusha, Tanzania, 12-16 June, 2011 P40 - Météorologie et climatologie F62 - Physiologie végétale - Croissance et développement K01 - Foresterie - Considérations générales Climate modeling scenarios predict deep changes of the rainfall regime in Amazonia for the next century. The expected increase in dry season length would lead to less water availability for trees. Every month during 3 years, growth measurement was recorded for more than 200 neotropical trees. Tree daily water availability during this period was simulated making use of a soil water balance model. Using a bayesian modeling framework, we analysed (i) the effect of water availability on tree growth and (ii) how functional trait modulated tree responses to drought. For most studied species, tree growth was deeply affected by seasonal water availability. Trees exhibited different water stress sensibilities linked to diffeent functional strategies, from a decrease to a stop in radial stem growth during the drought season. Largest increments were observe at the beginning of the rain season. The remaining part of unexplained variance, may be attributed to ressources competition, indiviual phenology, particular history or genetic. Our results suggest that the intensity of the annual dry season have a large impact on annual tree growth. If rainfall reduction is confirmed in the next decades, tree growth, and hence the whole forest dynamic, will undoubtely be modified. conference_item info:eu-repo/semantics/conferenceObject Conference info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/560558/1/document_560558.pdf application/pdf Cirad license info:eu-repo/semantics/openAccess https://agritrop.cirad.fr/mention_legale.html |
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P40 - Météorologie et climatologie F62 - Physiologie végétale - Croissance et développement K01 - Foresterie - Considérations générales P40 - Météorologie et climatologie F62 - Physiologie végétale - Croissance et développement K01 - Foresterie - Considérations générales |
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P40 - Météorologie et climatologie F62 - Physiologie végétale - Croissance et développement K01 - Foresterie - Considérations générales P40 - Météorologie et climatologie F62 - Physiologie végétale - Croissance et développement K01 - Foresterie - Considérations générales Wagner, Fabien Hérault, Bruno Stahl, Clément Bonal, Damien Rossi, Vivien Assessing the impact of water availability on growth of neotropical trees |
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Climate modeling scenarios predict deep changes of the rainfall regime in Amazonia for the next century. The expected increase in dry season length would lead to less water availability for trees. Every month during 3 years, growth measurement was recorded for more than 200 neotropical trees. Tree daily water availability during this period was simulated making use of a soil water balance model. Using a bayesian modeling framework, we analysed (i) the effect of water availability on tree growth and (ii) how functional trait modulated tree responses to drought. For most studied species, tree growth was deeply affected by seasonal water availability. Trees exhibited different water stress sensibilities linked to diffeent functional strategies, from a decrease to a stop in radial stem growth during the drought season. Largest increments were observe at the beginning of the rain season. The remaining part of unexplained variance, may be attributed to ressources competition, indiviual phenology, particular history or genetic. Our results suggest that the intensity of the annual dry season have a large impact on annual tree growth. If rainfall reduction is confirmed in the next decades, tree growth, and hence the whole forest dynamic, will undoubtely be modified. |
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P40 - Météorologie et climatologie F62 - Physiologie végétale - Croissance et développement K01 - Foresterie - Considérations générales |
author |
Wagner, Fabien Hérault, Bruno Stahl, Clément Bonal, Damien Rossi, Vivien |
author_facet |
Wagner, Fabien Hérault, Bruno Stahl, Clément Bonal, Damien Rossi, Vivien |
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Wagner, Fabien |
title |
Assessing the impact of water availability on growth of neotropical trees |
title_short |
Assessing the impact of water availability on growth of neotropical trees |
title_full |
Assessing the impact of water availability on growth of neotropical trees |
title_fullStr |
Assessing the impact of water availability on growth of neotropical trees |
title_full_unstemmed |
Assessing the impact of water availability on growth of neotropical trees |
title_sort |
assessing the impact of water availability on growth of neotropical trees |
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s.n. |
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http://agritrop.cirad.fr/560558/ http://agritrop.cirad.fr/560558/1/document_560558.pdf |
work_keys_str_mv |
AT wagnerfabien assessingtheimpactofwateravailabilityongrowthofneotropicaltrees AT heraultbruno assessingtheimpactofwateravailabilityongrowthofneotropicaltrees AT stahlclement assessingtheimpactofwateravailabilityongrowthofneotropicaltrees AT bonaldamien assessingtheimpactofwateravailabilityongrowthofneotropicaltrees AT rossivivien assessingtheimpactofwateravailabilityongrowthofneotropicaltrees |
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