Climate and genotype influences on carbon fluxes and partitioning in Eucalyptus plantations
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.foreco.2020.118445 http://hdl.handle.net/11449/199175 |
Resumo: | Clonal plantations of Eucalyptus are among the most productive forests in the world, with intensification of silviculture and genetic breeding doubling the wood mean annual increments over the past four decades. The TECHS Project demonstrated that even with intensive silviculture, wood production varies by more than two-fold across environmental gradients, and growth of highly selected clones differs by more than two-fold within a site. Wood production accounts for less than half of the photosynthesis of a forest, and we tested two hypotheses about the relation between wood production and the entire carbon balance for five genotypes across four of the TECHS sites, varying in temperature and water availability. We hypothesized that the influence of the environment on carbon fluxes and partitioning related to gross primary production would be consistent across genotypes. We also hypothesized that carbon flux and partitioning would be more sensitive to water stress than temperature. Annual average temperatures ranged from 18 to 27 °C, and annual rainfall ranged from about 600 to 1500 mm yr−1. Water stress was further tested by reduction in rainfall within sites using troughs to capture about 30% of incoming rain. The geographic gradient led to a six-fold range in wood net primary production during the two years of measurement (from age 1.5 to 3.5 years, the period of maximum current annual increment). Gross primary production (GPP) differed only by two-fold, highlighting very large differences among sites in partitioning: wood net primary production (NPP) accounted for 44% of GPP on sites with higher GPP, and only 34% of GPP on lower GPP sites. The average differences for wood NPP among clones was also large, with about half of the differences among clones relating to differences in GPP, and half to differences in the partitioning to wood NPP. The clones showed similar partitioning patterns across sites, supporting our first hypothesis. Differences across sites and clones in partitioning of GPP to wood NPP related inversely to belowground allocation. Belowground partitioning of carbon increased with increasing temperature and increasing water stress. Our second hypothesis was rejected, as patterns across sites related somewhat more strongly to temperature than to water stress. Overall, this ecophysiological investigation in the TECHS Project underscored the importance of understanding how carbon budgets differ across sites (even with intensive silviculture), and why clones can largely differ in wood production. |
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Climate and genotype influences on carbon fluxes and partitioning in Eucalyptus plantationsBelowground allocationClonal plantationDrought tolerantGenotypesWood productivityZoningClonal plantations of Eucalyptus are among the most productive forests in the world, with intensification of silviculture and genetic breeding doubling the wood mean annual increments over the past four decades. The TECHS Project demonstrated that even with intensive silviculture, wood production varies by more than two-fold across environmental gradients, and growth of highly selected clones differs by more than two-fold within a site. Wood production accounts for less than half of the photosynthesis of a forest, and we tested two hypotheses about the relation between wood production and the entire carbon balance for five genotypes across four of the TECHS sites, varying in temperature and water availability. We hypothesized that the influence of the environment on carbon fluxes and partitioning related to gross primary production would be consistent across genotypes. We also hypothesized that carbon flux and partitioning would be more sensitive to water stress than temperature. Annual average temperatures ranged from 18 to 27 °C, and annual rainfall ranged from about 600 to 1500 mm yr−1. Water stress was further tested by reduction in rainfall within sites using troughs to capture about 30% of incoming rain. The geographic gradient led to a six-fold range in wood net primary production during the two years of measurement (from age 1.5 to 3.5 years, the period of maximum current annual increment). Gross primary production (GPP) differed only by two-fold, highlighting very large differences among sites in partitioning: wood net primary production (NPP) accounted for 44% of GPP on sites with higher GPP, and only 34% of GPP on lower GPP sites. The average differences for wood NPP among clones was also large, with about half of the differences among clones relating to differences in GPP, and half to differences in the partitioning to wood NPP. The clones showed similar partitioning patterns across sites, supporting our first hypothesis. Differences across sites and clones in partitioning of GPP to wood NPP related inversely to belowground allocation. Belowground partitioning of carbon increased with increasing temperature and increasing water stress. Our second hypothesis was rejected, as patterns across sites related somewhat more strongly to temperature than to water stress. Overall, this ecophysiological investigation in the TECHS Project underscored the importance of understanding how carbon budgets differ across sites (even with intensive silviculture), and why clones can largely differ in wood production.Department of Forest Sciences Federal University of Lavras (UFLA)Department of Forest Soils and Environmental Sciences São Paulo State University (UNESP)Forestry Science and Research Institute (IPEF)School of Forestry Northern Arizona UniversityNatural Resource Ecology Laboratory Colorado State UniversityUSDA Forest Service Rocky Mountain Research StationKlabin Telêmaco BorbaInternational PaperSuzanoDepartment of Forest Soils and Environmental Sciences São Paulo State University (UNESP)Universidade Federal de Lavras (UFLA)Universidade Estadual Paulista (Unesp)Forestry Science and Research Institute (IPEF)Northern Arizona UniversityColorado State UniversityRocky Mountain Research StationTelêmaco BorbaInternational PaperSuzanoCampoe, Otávio C. [UNESP]Alvares, Clayton A. [UNESP]Carneiro, Rafaela L.Binkley, DanRyan, Michael G.Hubbard, Robert M.Stahl, JamesMoreira, GabrielaMoraes, Luiz FabianoStape, José Luiz [UNESP]2020-12-12T01:32:48Z2020-12-12T01:32:48Z2020-11-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.foreco.2020.118445Forest Ecology and Management, v. 475.0378-1127http://hdl.handle.net/11449/19917510.1016/j.foreco.2020.1184452-s2.0-85088656673Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengForest Ecology and Managementinfo:eu-repo/semantics/openAccess2021-10-23T04:24:09Zoai:repositorio.unesp.br:11449/199175Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T04:24:09Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Climate and genotype influences on carbon fluxes and partitioning in Eucalyptus plantations |
title |
Climate and genotype influences on carbon fluxes and partitioning in Eucalyptus plantations |
spellingShingle |
Climate and genotype influences on carbon fluxes and partitioning in Eucalyptus plantations Campoe, Otávio C. [UNESP] Belowground allocation Clonal plantation Drought tolerant Genotypes Wood productivity Zoning |
title_short |
Climate and genotype influences on carbon fluxes and partitioning in Eucalyptus plantations |
title_full |
Climate and genotype influences on carbon fluxes and partitioning in Eucalyptus plantations |
title_fullStr |
Climate and genotype influences on carbon fluxes and partitioning in Eucalyptus plantations |
title_full_unstemmed |
Climate and genotype influences on carbon fluxes and partitioning in Eucalyptus plantations |
title_sort |
Climate and genotype influences on carbon fluxes and partitioning in Eucalyptus plantations |
author |
Campoe, Otávio C. [UNESP] |
author_facet |
Campoe, Otávio C. [UNESP] Alvares, Clayton A. [UNESP] Carneiro, Rafaela L. Binkley, Dan Ryan, Michael G. Hubbard, Robert M. Stahl, James Moreira, Gabriela Moraes, Luiz Fabiano Stape, José Luiz [UNESP] |
author_role |
author |
author2 |
Alvares, Clayton A. [UNESP] Carneiro, Rafaela L. Binkley, Dan Ryan, Michael G. Hubbard, Robert M. Stahl, James Moreira, Gabriela Moraes, Luiz Fabiano Stape, José Luiz [UNESP] |
author2_role |
author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de Lavras (UFLA) Universidade Estadual Paulista (Unesp) Forestry Science and Research Institute (IPEF) Northern Arizona University Colorado State University Rocky Mountain Research Station Telêmaco Borba International Paper Suzano |
dc.contributor.author.fl_str_mv |
Campoe, Otávio C. [UNESP] Alvares, Clayton A. [UNESP] Carneiro, Rafaela L. Binkley, Dan Ryan, Michael G. Hubbard, Robert M. Stahl, James Moreira, Gabriela Moraes, Luiz Fabiano Stape, José Luiz [UNESP] |
dc.subject.por.fl_str_mv |
Belowground allocation Clonal plantation Drought tolerant Genotypes Wood productivity Zoning |
topic |
Belowground allocation Clonal plantation Drought tolerant Genotypes Wood productivity Zoning |
description |
Clonal plantations of Eucalyptus are among the most productive forests in the world, with intensification of silviculture and genetic breeding doubling the wood mean annual increments over the past four decades. The TECHS Project demonstrated that even with intensive silviculture, wood production varies by more than two-fold across environmental gradients, and growth of highly selected clones differs by more than two-fold within a site. Wood production accounts for less than half of the photosynthesis of a forest, and we tested two hypotheses about the relation between wood production and the entire carbon balance for five genotypes across four of the TECHS sites, varying in temperature and water availability. We hypothesized that the influence of the environment on carbon fluxes and partitioning related to gross primary production would be consistent across genotypes. We also hypothesized that carbon flux and partitioning would be more sensitive to water stress than temperature. Annual average temperatures ranged from 18 to 27 °C, and annual rainfall ranged from about 600 to 1500 mm yr−1. Water stress was further tested by reduction in rainfall within sites using troughs to capture about 30% of incoming rain. The geographic gradient led to a six-fold range in wood net primary production during the two years of measurement (from age 1.5 to 3.5 years, the period of maximum current annual increment). Gross primary production (GPP) differed only by two-fold, highlighting very large differences among sites in partitioning: wood net primary production (NPP) accounted for 44% of GPP on sites with higher GPP, and only 34% of GPP on lower GPP sites. The average differences for wood NPP among clones was also large, with about half of the differences among clones relating to differences in GPP, and half to differences in the partitioning to wood NPP. The clones showed similar partitioning patterns across sites, supporting our first hypothesis. Differences across sites and clones in partitioning of GPP to wood NPP related inversely to belowground allocation. Belowground partitioning of carbon increased with increasing temperature and increasing water stress. Our second hypothesis was rejected, as patterns across sites related somewhat more strongly to temperature than to water stress. Overall, this ecophysiological investigation in the TECHS Project underscored the importance of understanding how carbon budgets differ across sites (even with intensive silviculture), and why clones can largely differ in wood production. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-12T01:32:48Z 2020-12-12T01:32:48Z 2020-11-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.foreco.2020.118445 Forest Ecology and Management, v. 475. 0378-1127 http://hdl.handle.net/11449/199175 10.1016/j.foreco.2020.118445 2-s2.0-85088656673 |
url |
http://dx.doi.org/10.1016/j.foreco.2020.118445 http://hdl.handle.net/11449/199175 |
identifier_str_mv |
Forest Ecology and Management, v. 475. 0378-1127 10.1016/j.foreco.2020.118445 2-s2.0-85088656673 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Forest Ecology and Management |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1797789425332125696 |