Thinning temporarily stimulates tree regeneration in a restored tropical forest
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.ecoleng.2021.106390 http://hdl.handle.net/11449/229357 |
Resumo: | When an ecosystem undergoing restoration does not follow the desired trajectory, management interventions may be warranted. Where the initial steps towards restoration include tree planting at high densities, reduction of stand basal area (BA) by overstory thinning is a potential adaptive management tool to stimulate natural regeneration, although it can also damage young plants. We ask how tree regeneration in a restored tropical forest responds to different intensities of thinning. We applied two intensities of thinning to a 22-yr-old restored forest in southeastern Brazil and then sampled seedlings and saplings before and over an eight year period after thinning; unthinned plots were retained as controls. Thinning impacts on the woody understory were negligible, far below annual mortality in control plots. Positive responses to thinning were stronger in the treatment with low remaining basal area (ca. 30% below the reference forests), with increases in seedling density, numbers of recruits, and seedling-to-sapling and sapling-to-tree transitions. Understory dynamics were clearly intensified by gap opening, with a pulse of natural regeneration in the first years after thinning. These changes, however, were not simultaneous and did not usually persist over time. Rarefied richness of the understory increased over time after all treatments and changes in species composition of saplings were enhanced by thinning. Our study gives support to selective timber harvests from restored tropical forests insofar as thinning did not threaten the understory and stimulated natural regeneration. Frequency and intensity of thinning operations, however, should be locally adjusted based on monitoring data. |
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Thinning temporarily stimulates tree regeneration in a restored tropical forestAdaptive managementForest dynamicsForest restorationForest structureRestoration thinningTree diversityTropical silvicultureWhen an ecosystem undergoing restoration does not follow the desired trajectory, management interventions may be warranted. Where the initial steps towards restoration include tree planting at high densities, reduction of stand basal area (BA) by overstory thinning is a potential adaptive management tool to stimulate natural regeneration, although it can also damage young plants. We ask how tree regeneration in a restored tropical forest responds to different intensities of thinning. We applied two intensities of thinning to a 22-yr-old restored forest in southeastern Brazil and then sampled seedlings and saplings before and over an eight year period after thinning; unthinned plots were retained as controls. Thinning impacts on the woody understory were negligible, far below annual mortality in control plots. Positive responses to thinning were stronger in the treatment with low remaining basal area (ca. 30% below the reference forests), with increases in seedling density, numbers of recruits, and seedling-to-sapling and sapling-to-tree transitions. Understory dynamics were clearly intensified by gap opening, with a pulse of natural regeneration in the first years after thinning. These changes, however, were not simultaneous and did not usually persist over time. Rarefied richness of the understory increased over time after all treatments and changes in species composition of saplings were enhanced by thinning. Our study gives support to selective timber harvests from restored tropical forests insofar as thinning did not threaten the understory and stimulated natural regeneration. Frequency and intensity of thinning operations, however, should be locally adjusted based on monitoring data.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Departamento de Ciência Florestal Solos e Ambiente Faculdade de Ciências Agronômicas Universidade Estadual Paulista “Júlio de Mesquita Filho”, Avenida Universitária, 3780, Altos do ParaísoFloresta Estadual de Assis Instituto de Pesquisas Ambientais, Caixa Postal 104Department of Biology University of Florida, P.O. Box 118526Departamento de Ciência Florestal Solos e Ambiente Faculdade de Ciências Agronômicas Universidade Estadual Paulista “Júlio de Mesquita Filho”, Avenida Universitária, 3780, Altos do ParaísoCNPq: #303402/2012CNPq: #561771/2010-3CAPES: 001Universidade Estadual Paulista (UNESP)Instituto de Pesquisas AmbientaisUniversity of FloridaOliveira, Carlos Delano Cardoso de [UNESP]Durigan, Giselda [UNESP]Putz, Francis Edward2022-04-29T08:32:06Z2022-04-29T08:32:06Z2021-11-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.ecoleng.2021.106390Ecological Engineering, v. 171.0925-8574http://hdl.handle.net/11449/22935710.1016/j.ecoleng.2021.1063902-s2.0-85112771640Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengEcological Engineeringinfo:eu-repo/semantics/openAccess2024-04-30T13:11:03Zoai:repositorio.unesp.br:11449/229357Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:14:56.603794Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Thinning temporarily stimulates tree regeneration in a restored tropical forest |
title |
Thinning temporarily stimulates tree regeneration in a restored tropical forest |
spellingShingle |
Thinning temporarily stimulates tree regeneration in a restored tropical forest Oliveira, Carlos Delano Cardoso de [UNESP] Adaptive management Forest dynamics Forest restoration Forest structure Restoration thinning Tree diversity Tropical silviculture |
title_short |
Thinning temporarily stimulates tree regeneration in a restored tropical forest |
title_full |
Thinning temporarily stimulates tree regeneration in a restored tropical forest |
title_fullStr |
Thinning temporarily stimulates tree regeneration in a restored tropical forest |
title_full_unstemmed |
Thinning temporarily stimulates tree regeneration in a restored tropical forest |
title_sort |
Thinning temporarily stimulates tree regeneration in a restored tropical forest |
author |
Oliveira, Carlos Delano Cardoso de [UNESP] |
author_facet |
Oliveira, Carlos Delano Cardoso de [UNESP] Durigan, Giselda [UNESP] Putz, Francis Edward |
author_role |
author |
author2 |
Durigan, Giselda [UNESP] Putz, Francis Edward |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Instituto de Pesquisas Ambientais University of Florida |
dc.contributor.author.fl_str_mv |
Oliveira, Carlos Delano Cardoso de [UNESP] Durigan, Giselda [UNESP] Putz, Francis Edward |
dc.subject.por.fl_str_mv |
Adaptive management Forest dynamics Forest restoration Forest structure Restoration thinning Tree diversity Tropical silviculture |
topic |
Adaptive management Forest dynamics Forest restoration Forest structure Restoration thinning Tree diversity Tropical silviculture |
description |
When an ecosystem undergoing restoration does not follow the desired trajectory, management interventions may be warranted. Where the initial steps towards restoration include tree planting at high densities, reduction of stand basal area (BA) by overstory thinning is a potential adaptive management tool to stimulate natural regeneration, although it can also damage young plants. We ask how tree regeneration in a restored tropical forest responds to different intensities of thinning. We applied two intensities of thinning to a 22-yr-old restored forest in southeastern Brazil and then sampled seedlings and saplings before and over an eight year period after thinning; unthinned plots were retained as controls. Thinning impacts on the woody understory were negligible, far below annual mortality in control plots. Positive responses to thinning were stronger in the treatment with low remaining basal area (ca. 30% below the reference forests), with increases in seedling density, numbers of recruits, and seedling-to-sapling and sapling-to-tree transitions. Understory dynamics were clearly intensified by gap opening, with a pulse of natural regeneration in the first years after thinning. These changes, however, were not simultaneous and did not usually persist over time. Rarefied richness of the understory increased over time after all treatments and changes in species composition of saplings were enhanced by thinning. Our study gives support to selective timber harvests from restored tropical forests insofar as thinning did not threaten the understory and stimulated natural regeneration. Frequency and intensity of thinning operations, however, should be locally adjusted based on monitoring data. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-11-01 2022-04-29T08:32:06Z 2022-04-29T08:32:06Z |
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.ecoleng.2021.106390 Ecological Engineering, v. 171. 0925-8574 http://hdl.handle.net/11449/229357 10.1016/j.ecoleng.2021.106390 2-s2.0-85112771640 |
url |
http://dx.doi.org/10.1016/j.ecoleng.2021.106390 http://hdl.handle.net/11449/229357 |
identifier_str_mv |
Ecological Engineering, v. 171. 0925-8574 10.1016/j.ecoleng.2021.106390 2-s2.0-85112771640 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Ecological Engineering |
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 |
|
_version_ |
1808129041441488896 |