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Registro Completo |
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
18/09/2020 |
Data da última atualização: |
18/09/2020 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
STARK, S. C.; BRESHEARS, D. D.; ARAGÓN, S.; VILLEGAS, J. C.; LAW, D. J.; SMITH, M. N.; MINOR, D. M.; ASSIS, R. L. de; ALMEIDA, D. R. A. de; OLIVEIRA, G. de; SALESKA, S. R.; SWANN, A. S.; MOURA, J. M. S.; CAMARGO, J. L.; SILVA, R. da; ARAGÃO, L. E. O. C.; OLIVEIRA JUNIOR, R. C. de. |
Afiliação: |
SCOTT C. STARK, Michigan State University; DAVID D. BRESHEARS, University of Arizona; SUSAN ARAGÓN, INPA / UFOPA / PUCP; JUAN CAMILO VILLEGAS, University of Arizona / Universidad de Antioquia; DARIN J. LAW, University of Arizona; MARIELLE N. SMITH, Michigan State University; DAVID M. MINOR, Michigan State University / University of Maryland at College Park; RAFAEL LEANDRO DE ASSIS, INPA / University of Oslo; DANILO ROBERTI ALVES DE ALMEIDA, USP/ESALQ; GABRIEL DE OLIVEIRA, University of Toronto / INPE; SCOTT R. SALESKA, University of Arizona; ABIGAILL. S. SWANN, University of Washington; JOSÉ MAURO S. MOURA, UFOPA; JOSÉ LUIS CAMARGO, INPA; RODRIGO DA SILVA, Laboratório de Física e Química da Atmosfera; LUIZ E. O. C. ARAGÃO, INPE / University of Exeter; RAIMUNDO COSME DE OLIVEIRA JUNIOR, CPATU. |
Título: |
Reframing tropical savannization: linking changes in canopy structure to energy balance alterations that impact climate. |
Ano de publicação: |
2020 |
Fonte/Imprenta: |
Ecosphere, v. 11, n. 9, e03231, 2020. |
DOI: |
https://doi.org/10.1002/ecs2.3231 |
Idioma: |
Inglês |
Conteúdo: |
Tropical ecosystems are undergoing unprecedented rates of degradation from deforestation, fire, and drought disturbances. The collective effects of these disturbances threaten to shift large portions of tropical ecosystems such as Amazon forests into savanna like structure via tree loss, functional changes, and the emergence of fire (savannization). Changes from forest states to a more open savanna like structure can affect local microclimates, surface energy fluxes, and biosphere?atmosphere interactions. A predominant type of ecosystem state change is the loss of tree cover and structural complexity in disturbed forest. Although important advances have been made contrasting energy fluxes between historically distinct old growth forest and savanna systems, the emergence of secondary forests and savanna like ecosystems necessitates a reframing to consider gradients of tree structure that span forest to savanna like states at multiple scales. In this Innovative Viewpoint, we draw from the literature on forest?grassland continua to develop a framework to assess the consequences of tropical forest degradation on surface energy fluxes and canopy structure. We illustrate this framework for forest sites with contrasting canopy structure that ranges from simple, open, and savanna like to complex and closed, representative of tropical wet forest, within two climatically distinct regions in the Amazon. Using a recently developed rapid field assessment approach, we quantify differences in cover, leaf area vertical profiles, surface roughness, albedo, and energy balance partitioning between adjacent sites and compare canopy structure with adjacent old growth forest; more structurally simple forests displayed lower net radiation. To address forest?atmosphere feedback, we also consider the effects of canopy structure change on susceptibility to additional future disturbance. We illustrate a converse transition?recovery in structure following disturbance?measuring forest canopy structure 10 yr after the imposition of a drought in the ground breaking Seca Floresta experiment. Our approach strategically enables rapid characterization of surface properties relevant to vegetation models following degradation, and advances links between surface properties and canopy structure variables, increasingly available from remote sensing. Concluding, we hypothesize that understanding surface energy balance and microclimate change across degraded tropical forest states not only reveals critical atmospheric forcing, but also critical local scale feedbacks from forest sensitivity to additional climate linked disturbance. MenosTropical ecosystems are undergoing unprecedented rates of degradation from deforestation, fire, and drought disturbances. The collective effects of these disturbances threaten to shift large portions of tropical ecosystems such as Amazon forests into savanna like structure via tree loss, functional changes, and the emergence of fire (savannization). Changes from forest states to a more open savanna like structure can affect local microclimates, surface energy fluxes, and biosphere?atmosphere interactions. A predominant type of ecosystem state change is the loss of tree cover and structural complexity in disturbed forest. Although important advances have been made contrasting energy fluxes between historically distinct old growth forest and savanna systems, the emergence of secondary forests and savanna like ecosystems necessitates a reframing to consider gradients of tree structure that span forest to savanna like states at multiple scales. In this Innovative Viewpoint, we draw from the literature on forest?grassland continua to develop a framework to assess the consequences of tropical forest degradation on surface energy fluxes and canopy structure. We illustrate this framework for forest sites with contrasting canopy structure that ranges from simple, open, and savanna like to complex and closed, representative of tropical wet forest, within two climatically distinct regions in the Amazon. Using a recently developed rapid field assessment approach, we quantify differences... Mostrar Tudo |
Palavras-Chave: |
Balanço energético; Savanização; Transição florestal. |
Thesagro: |
Mudança Climática; Vegetação. |
Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/216113/1/ecs2.3231.pdf
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Marc: |
LEADER 03773naa a2200385 a 4500 001 2125025 005 2020-09-18 008 2020 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1002/ecs2.3231$2DOI 100 1 $aSTARK, S. C. 245 $aReframing tropical savannization$blinking changes in canopy structure to energy balance alterations that impact climate.$h[electronic resource] 260 $c2020 520 $aTropical ecosystems are undergoing unprecedented rates of degradation from deforestation, fire, and drought disturbances. The collective effects of these disturbances threaten to shift large portions of tropical ecosystems such as Amazon forests into savanna like structure via tree loss, functional changes, and the emergence of fire (savannization). Changes from forest states to a more open savanna like structure can affect local microclimates, surface energy fluxes, and biosphere?atmosphere interactions. A predominant type of ecosystem state change is the loss of tree cover and structural complexity in disturbed forest. Although important advances have been made contrasting energy fluxes between historically distinct old growth forest and savanna systems, the emergence of secondary forests and savanna like ecosystems necessitates a reframing to consider gradients of tree structure that span forest to savanna like states at multiple scales. In this Innovative Viewpoint, we draw from the literature on forest?grassland continua to develop a framework to assess the consequences of tropical forest degradation on surface energy fluxes and canopy structure. We illustrate this framework for forest sites with contrasting canopy structure that ranges from simple, open, and savanna like to complex and closed, representative of tropical wet forest, within two climatically distinct regions in the Amazon. Using a recently developed rapid field assessment approach, we quantify differences in cover, leaf area vertical profiles, surface roughness, albedo, and energy balance partitioning between adjacent sites and compare canopy structure with adjacent old growth forest; more structurally simple forests displayed lower net radiation. To address forest?atmosphere feedback, we also consider the effects of canopy structure change on susceptibility to additional future disturbance. We illustrate a converse transition?recovery in structure following disturbance?measuring forest canopy structure 10 yr after the imposition of a drought in the ground breaking Seca Floresta experiment. Our approach strategically enables rapid characterization of surface properties relevant to vegetation models following degradation, and advances links between surface properties and canopy structure variables, increasingly available from remote sensing. Concluding, we hypothesize that understanding surface energy balance and microclimate change across degraded tropical forest states not only reveals critical atmospheric forcing, but also critical local scale feedbacks from forest sensitivity to additional climate linked disturbance. 650 $aMudança Climática 650 $aVegetação 653 $aBalanço energético 653 $aSavanização 653 $aTransição florestal 700 1 $aBRESHEARS, D. D. 700 1 $aARAGÓN, S. 700 1 $aVILLEGAS, J. C. 700 1 $aLAW, D. J. 700 1 $aSMITH, M. N. 700 1 $aMINOR, D. M. 700 1 $aASSIS, R. L. de 700 1 $aALMEIDA, D. R. A. de 700 1 $aOLIVEIRA, G. de 700 1 $aSALESKA, S. R. 700 1 $aSWANN, A. S. 700 1 $aMOURA, J. M. S. 700 1 $aCAMARGO, J. L. 700 1 $aSILVA, R. da 700 1 $aARAGÃO, L. E. O. C. 700 1 $aOLIVEIRA JUNIOR, R. C. de 773 $tEcosphere$gv. 11, n. 9, e03231, 2020.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Biblioteca(s): |
Embrapa Meio-Norte. |
Data corrente: |
21/02/2020 |
Data da última atualização: |
12/12/2023 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
SOUSA, P. A. de; SILVA, K. J. D. e; BASTOS, E. A.; ROCHA, M. de M. |
Afiliação: |
PABLO ALVES DE SOUSA, UFPI, BOLSISTA PIBIC/CNPq; KAESEL JACKSON DAMASCENO E SILVA, CPAMN; EDSON ALVES BASTOS, CPAMN; MAURISRAEL DE MOURA ROCHA, CPAMN. |
Título: |
Avaliação de famílias S0:3 para tolerância à seca em feijão-caupi. |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
In: JORNADA DE INICIAÇÃO CIENTÍFICA DA EMBRAPA MEIO-NORTE, 3., 2017, Teresina, PI. Anais da III Jornada Científica da Embrapa Meio-Norte. Teresina: Embrapa Meio-Norte, 2017. |
Páginas: |
p. 30. |
Idioma: |
Português |
Conteúdo: |
Objetivou-se avaliar famílias de feijão-caupi para tolerância ao deficit hídrico, por meio do processo de seleção recorrente. |
Palavras-Chave: |
Déficit hídrico; Feijão caupi. |
Thesagro: |
Seleção Recorrente. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/211120/1/Terceira-Jornada-Cientifica-00030.pdf
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Marc: |
LEADER 00828nam a2200193 a 4500 001 2120501 005 2023-12-12 008 2017 bl uuuu u00u1 u #d 100 1 $aSOUSA, P. A. de 245 $aAvaliação de famílias S0$b3 para tolerância à seca em feijão-caupi.$h[electronic resource] 260 $aIn: JORNADA DE INICIAÇÃO CIENTÍFICA DA EMBRAPA MEIO-NORTE, 3., 2017, Teresina, PI. Anais da III Jornada Científica da Embrapa Meio-Norte. Teresina: Embrapa Meio-Norte$c2017 300 $ap. 30. 520 $aObjetivou-se avaliar famílias de feijão-caupi para tolerância ao deficit hídrico, por meio do processo de seleção recorrente. 650 $aSeleção Recorrente 653 $aDéficit hídrico 653 $aFeijão caupi 700 1 $aSILVA, K. J. D. e 700 1 $aBASTOS, E. A. 700 1 $aROCHA, M. de M.
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