The other side of droughts: wet extremes and topography as buffers of negative drought effects in an Amazonian forest.

Detalhes bibliográficos
Autor(a) principal: ESTEBAN, E. J. L.
Data de Publicação: 2021
Outros Autores: CASTILHO, C. V. de, MELGACO, K. L., COSTA, F. R. C.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1134301
Resumo: There is a consensus about negative impacts of droughts in Amazonia. Yet, extreme wet episodes, which are becoming as severe and frequent as droughts, are overlooked and their impacts remain poorly understood. Moreover, drought reports are mostly based on forests over a deep water table (DWT), which may be particularly sensitive to dry conditions. Based on demographic responses of 30 abundant tree species over the past two decades, in this study we analyzed the impacts of severe droughts but also of concurrent extreme wet periods, and how topographic affiliation (to shallow - SWTs - or deep - DWTs - water tables), together with species functional traits, mediated climate effects on trees. Dry and wet extremes decreased growth and increased tree mortality, but interactions of these climatic anomalies had the highest and most positive impact, mitigating the simple negative effects. Despite being more drought-tolerant, species in DWT forests were more negatively affected than hydraulically vulnerable species in SWT forests. Interaction of wet-dry extremes and SWT depth modulated tree responses to climate, providing buffers to droughts in Amazonia. As extreme wet periods are projected to increase and at least 36% of the Amazon comprises SWT forests, our results highlight the importance of considering these factors in order to improve our knowledge about forest resilience to climate change.
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spelling The other side of droughts: wet extremes and topography as buffers of negative drought effects in an Amazonian forest.AmazoniaClimate changeDroughtTopographyTropical forestsThere is a consensus about negative impacts of droughts in Amazonia. Yet, extreme wet episodes, which are becoming as severe and frequent as droughts, are overlooked and their impacts remain poorly understood. Moreover, drought reports are mostly based on forests over a deep water table (DWT), which may be particularly sensitive to dry conditions. Based on demographic responses of 30 abundant tree species over the past two decades, in this study we analyzed the impacts of severe droughts but also of concurrent extreme wet periods, and how topographic affiliation (to shallow - SWTs - or deep - DWTs - water tables), together with species functional traits, mediated climate effects on trees. Dry and wet extremes decreased growth and increased tree mortality, but interactions of these climatic anomalies had the highest and most positive impact, mitigating the simple negative effects. Despite being more drought-tolerant, species in DWT forests were more negatively affected than hydraulically vulnerable species in SWT forests. Interaction of wet-dry extremes and SWT depth modulated tree responses to climate, providing buffers to droughts in Amazonia. As extreme wet periods are projected to increase and at least 36% of the Amazon comprises SWT forests, our results highlight the importance of considering these factors in order to improve our knowledge about forest resilience to climate change.CAROLINA VOLKMER DE CASTILHO, CPAF-RR.ESTEBAN, E. J. L.CASTILHO, C. V. deMELGACO, K. L.COSTA, F. R. C.2021-09-14T02:15:02Z2021-09-14T02:15:02Z2021-09-132021info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleNew Phytologist, v. 229, n. 4, Feb., 2021.http://www.alice.cnptia.embrapa.br/alice/handle/doc/113430110.1111/nph.17005enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2021-09-14T02:15:11Zoai:www.alice.cnptia.embrapa.br:doc/1134301Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542021-09-14T02:15:11falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542021-09-14T02:15:11Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv The other side of droughts: wet extremes and topography as buffers of negative drought effects in an Amazonian forest.
title The other side of droughts: wet extremes and topography as buffers of negative drought effects in an Amazonian forest.
spellingShingle The other side of droughts: wet extremes and topography as buffers of negative drought effects in an Amazonian forest.
ESTEBAN, E. J. L.
Amazonia
Climate change
Drought
Topography
Tropical forests
title_short The other side of droughts: wet extremes and topography as buffers of negative drought effects in an Amazonian forest.
title_full The other side of droughts: wet extremes and topography as buffers of negative drought effects in an Amazonian forest.
title_fullStr The other side of droughts: wet extremes and topography as buffers of negative drought effects in an Amazonian forest.
title_full_unstemmed The other side of droughts: wet extremes and topography as buffers of negative drought effects in an Amazonian forest.
title_sort The other side of droughts: wet extremes and topography as buffers of negative drought effects in an Amazonian forest.
author ESTEBAN, E. J. L.
author_facet ESTEBAN, E. J. L.
CASTILHO, C. V. de
MELGACO, K. L.
COSTA, F. R. C.
author_role author
author2 CASTILHO, C. V. de
MELGACO, K. L.
COSTA, F. R. C.
author2_role author
author
author
dc.contributor.none.fl_str_mv CAROLINA VOLKMER DE CASTILHO, CPAF-RR.
dc.contributor.author.fl_str_mv ESTEBAN, E. J. L.
CASTILHO, C. V. de
MELGACO, K. L.
COSTA, F. R. C.
dc.subject.por.fl_str_mv Amazonia
Climate change
Drought
Topography
Tropical forests
topic Amazonia
Climate change
Drought
Topography
Tropical forests
description There is a consensus about negative impacts of droughts in Amazonia. Yet, extreme wet episodes, which are becoming as severe and frequent as droughts, are overlooked and their impacts remain poorly understood. Moreover, drought reports are mostly based on forests over a deep water table (DWT), which may be particularly sensitive to dry conditions. Based on demographic responses of 30 abundant tree species over the past two decades, in this study we analyzed the impacts of severe droughts but also of concurrent extreme wet periods, and how topographic affiliation (to shallow - SWTs - or deep - DWTs - water tables), together with species functional traits, mediated climate effects on trees. Dry and wet extremes decreased growth and increased tree mortality, but interactions of these climatic anomalies had the highest and most positive impact, mitigating the simple negative effects. Despite being more drought-tolerant, species in DWT forests were more negatively affected than hydraulically vulnerable species in SWT forests. Interaction of wet-dry extremes and SWT depth modulated tree responses to climate, providing buffers to droughts in Amazonia. As extreme wet periods are projected to increase and at least 36% of the Amazon comprises SWT forests, our results highlight the importance of considering these factors in order to improve our knowledge about forest resilience to climate change.
publishDate 2021
dc.date.none.fl_str_mv 2021-09-14T02:15:02Z
2021-09-14T02:15:02Z
2021-09-13
2021
dc.type.driver.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv New Phytologist, v. 229, n. 4, Feb., 2021.
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1134301
10.1111/nph.17005
identifier_str_mv New Phytologist, v. 229, n. 4, Feb., 2021.
10.1111/nph.17005
url http://www.alice.cnptia.embrapa.br/alice/handle/doc/1134301
dc.language.iso.fl_str_mv eng
language eng
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dc.source.none.fl_str_mv reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
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instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
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