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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
17/11/2020 |
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Data da última atualização: |
11/01/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ROWLAND, L.; COSTA, A. C. L. da; OLIVEIRA, R. S.; BITTENCOURT, P. R. L.; GILES, A. L.; COUGHLIN, I.; COSTA, P. de B.; BARTHOLOMEW, D.; DOMINGUES, T. F.; MIATTO, R. C.; FERREIRA, L. V.; VASCONCELOS, S. S.; S. JUNIOR, J. A.; OLIVEIRA, A. A. R.; MENCUCCINI, M.; MEIR, P. |
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Afiliação: |
Lucy Rowland, University of Exeter; Antonio C. L. da Costa, UFPA / MPEG; Rafael S. Oliveira, UNICAMP; Paulo R. L. Bittencourt, UNICAMP / University of Exeter; André L. Giles, UNICAMP; Ingrid Coughlin, USP / Australian National University; Patricia de Britto Costa, UNICAMP; David Bartholomew, University of Exeter; Tomas F. Domingues, USP; Raquel C. Miatto, USP; Leandro V. Ferreira, MPEG; STEEL SILVA VASCONCELOS, CPATU; Joao A. S. Junior, UFPA; Alex A. R. Oliveira, Australian National University; Maurizio Mencuccini, CREAF, Campus UAB / ICREA; Patrick Meir, USP / University of Edinburgh. |
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Título: |
The response of carbon assimilation and storage to long-term drought in tropical trees is dependent on light availability. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Functional Ecology, v. 35, n. 1, p. 43-53, Jan. 2021. |
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DOI: |
https://doi.org/10.1111/1365-2435.13689 |
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Idioma: |
Inglês |
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Notas: |
Publicado online em 29 set. 2020. |
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Conteúdo: |
Whether tropical trees acclimate to long‐term drought stress remains unclear. This uncertainty is amplified if drought stress is accompanied by changes in other drivers such as the increases in canopy light exposure that might be induced by tree mortality or other disturbances. Photosynthetic capacity, leaf respiration, non‐structural carbohydrate (NSC) storage and stomatal conductance were measured on 162 trees at the world's longest running (15 years) tropical forest drought experiment. We test whether surviving trees have altered strategies for carbon storage and carbon use in the drier and elevated light conditions present following drought‐related tree mortality. Relative to control trees, the surviving trees experiencing the drought treatment showed functional responses including: (a) moderately reduced photosynthetic capacity; (b) increased total leaf NSC; and (c) a switch from starch to soluble sugars as the main store of branch NSC. This contrasts with earlier findings at this experiment of no change in photosynthetic capacity or NSC storage. The changes detected here only occurred in the subset of drought‐stressed trees with canopies exposed to high radiation and were absent in trees with less‐exposed canopies and also in the community average. In contrast to previous results acquired through less intensive species sampling from this experiment, we also observe no species‐average drought‐induced change in leaf respiration. Our results suggest that long‐term responses to drought stress are strongly influenced by a tree's full‐canopy light environment and therefore that disturbance‐induced changes in stand density and dynamics are likely to substantially impact tropical forest responses to climate change. We also demonstrate that, while challenging, intensive sampling is essential in tropical forests to avoid sampling biases caused by limited taxonomic coverage. MenosWhether tropical trees acclimate to long‐term drought stress remains unclear. This uncertainty is amplified if drought stress is accompanied by changes in other drivers such as the increases in canopy light exposure that might be induced by tree mortality or other disturbances. Photosynthetic capacity, leaf respiration, non‐structural carbohydrate (NSC) storage and stomatal conductance were measured on 162 trees at the world's longest running (15 years) tropical forest drought experiment. We test whether surviving trees have altered strategies for carbon storage and carbon use in the drier and elevated light conditions present following drought‐related tree mortality. Relative to control trees, the surviving trees experiencing the drought treatment showed functional responses including: (a) moderately reduced photosynthetic capacity; (b) increased total leaf NSC; and (c) a switch from starch to soluble sugars as the main store of branch NSC. This contrasts with earlier findings at this experiment of no change in photosynthetic capacity or NSC storage. The changes detected here only occurred in the subset of drought‐stressed trees with canopies exposed to high radiation and were absent in trees with less‐exposed canopies and also in the community average. In contrast to previous results acquired through less intensive species sampling from this experiment, we also observe no species‐average drought‐induced change in leaf respiration. ... Mostrar Tudo |
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Thesagro: |
Carboidrato; Floresta Tropical; Fotossíntese; Respiração; Seca. |
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Thesaurus Nal: |
Carbohydrates; Drought; Light; Photosynthesis; Stomatal conductance; Tropical forests. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/220103/1/1365-2435.13689-2021.pdf
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Marc: |
LEADER 03293naa a2200457 a 4500
001 2126671
005 2021-01-11
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1111/1365-2435.13689$2DOI
100 1 $aROWLAND, L.
245 $aThe response of carbon assimilation and storage to long-term drought in tropical trees is dependent on light availability.$h[electronic resource]
260 $c2021
500 $aPublicado online em 29 set. 2020.
520 $aWhether tropical trees acclimate to long‐term drought stress remains unclear. This uncertainty is amplified if drought stress is accompanied by changes in other drivers such as the increases in canopy light exposure that might be induced by tree mortality or other disturbances. Photosynthetic capacity, leaf respiration, non‐structural carbohydrate (NSC) storage and stomatal conductance were measured on 162 trees at the world's longest running (15 years) tropical forest drought experiment. We test whether surviving trees have altered strategies for carbon storage and carbon use in the drier and elevated light conditions present following drought‐related tree mortality. Relative to control trees, the surviving trees experiencing the drought treatment showed functional responses including: (a) moderately reduced photosynthetic capacity; (b) increased total leaf NSC; and (c) a switch from starch to soluble sugars as the main store of branch NSC. This contrasts with earlier findings at this experiment of no change in photosynthetic capacity or NSC storage. The changes detected here only occurred in the subset of drought‐stressed trees with canopies exposed to high radiation and were absent in trees with less‐exposed canopies and also in the community average. In contrast to previous results acquired through less intensive species sampling from this experiment, we also observe no species‐average drought‐induced change in leaf respiration. Our results suggest that long‐term responses to drought stress are strongly influenced by a tree's full‐canopy light environment and therefore that disturbance‐induced changes in stand density and dynamics are likely to substantially impact tropical forest responses to climate change. We also demonstrate that, while challenging, intensive sampling is essential in tropical forests to avoid sampling biases caused by limited taxonomic coverage.
650 $aCarbohydrates
650 $aDrought
650 $aLight
650 $aPhotosynthesis
650 $aStomatal conductance
650 $aTropical forests
650 $aCarboidrato
650 $aFloresta Tropical
650 $aFotossíntese
650 $aRespiração
650 $aSeca
700 1 $aCOSTA, A. C. L. da
700 1 $aOLIVEIRA, R. S.
700 1 $aBITTENCOURT, P. R. L.
700 1 $aGILES, A. L.
700 1 $aCOUGHLIN, I.
700 1 $aCOSTA, P. de B.
700 1 $aBARTHOLOMEW, D.
700 1 $aDOMINGUES, T. F.
700 1 $aMIATTO, R. C.
700 1 $aFERREIRA, L. V.
700 1 $aVASCONCELOS, S. S.
700 1 $aS. JUNIOR, J. A.
700 1 $aOLIVEIRA, A. A. R.
700 1 $aMENCUCCINI, M.
700 1 $aMEIR, P.
773 $tFunctional Ecology$gv. 35, n. 1, p. 43-53, Jan. 2021.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
19/03/2019 |
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Data da última atualização: |
19/03/2019 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
SOUZA, N. A.; MACHADO, R. A.; CARDOSO, I. M.; SILVA, R. D. M.; MELGAÇO, L.; AMANCIO, C. O. da G. |
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Afiliação: |
CRISTHIANE OLIVEIRA DA G AMANCIO, CNPAB. |
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Título: |
As oficinas de sistematização: espaços de sentir, pensar e transformar |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Cadernos de Agroecologia v. 13, n. 1, p. 1-7, Jul. 2018. |
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Idioma: |
Português |
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Notas: |
Anais do VI Congresso Latino-americano de Agroecologia; X Congresso Brasileiro de Agroecologia; V Seminário de Agroecologia do Distrito Federal e Entorno; 12 a 15 de setembro de 2017, Brasília/DF |
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Conteúdo: |
Os Núcleos de Estudos em Agroecologia (NEAs) possibilitam inovações por construírem ações de ensino, pesquisa e extensão de forma indissociável, o que tem permitido ampliar o diálogo com a sociedade. Para isto, os Núcleos buscam integrar e adaptar diferentes Me-todologias e técnicas que facilitam o diálogo e o intercâmbio entre diferentes experiências. A partir das vivências e narrativas do Projeto de Sistematização, animado pela Associação Brasileira de Agroecologia (ABA-Agroecologia), este relato compartilha alguns dos percursos metodológicos construídos com os NEAs durante as oficinas de sistematização. Inspirados na educação popular, as oficinas vêm exercitando inúmeras possibilidades de interação e apren-dizagem entre cultura, a educação e as práticas agroecológicas |
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Palavras-Chave: |
Agroecologia; Educação popular; Metodologias participativas; Sistematização de experiências. |
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Categoria do assunto: |
B Sociologia Rural |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/194521/1/As-oficinas-de-sistematizacao.pdf
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Marc: |
LEADER 01706nam a2200229 a 4500
001 2107241
005 2019-03-19
008 2018 bl uuuu u00u1 u #d
100 1 $aSOUZA, N. A.
245 $aAs oficinas de sistematização$bespaços de sentir, pensar e transformar$h[electronic resource]
260 $aCadernos de Agroecologia v. 13, n. 1, p. 1-7, Jul. 2018.$c2018
500 $aAnais do VI Congresso Latino-americano de Agroecologia; X Congresso Brasileiro de Agroecologia; V Seminário de Agroecologia do Distrito Federal e Entorno; 12 a 15 de setembro de 2017, Brasília/DF
520 $aOs Núcleos de Estudos em Agroecologia (NEAs) possibilitam inovações por construírem ações de ensino, pesquisa e extensão de forma indissociável, o que tem permitido ampliar o diálogo com a sociedade. Para isto, os Núcleos buscam integrar e adaptar diferentes Me-todologias e técnicas que facilitam o diálogo e o intercâmbio entre diferentes experiências. A partir das vivências e narrativas do Projeto de Sistematização, animado pela Associação Brasileira de Agroecologia (ABA-Agroecologia), este relato compartilha alguns dos percursos metodológicos construídos com os NEAs durante as oficinas de sistematização. Inspirados na educação popular, as oficinas vêm exercitando inúmeras possibilidades de interação e apren-dizagem entre cultura, a educação e as práticas agroecológicas
653 $aAgroecologia
653 $aEducação popular
653 $aMetodologias participativas
653 $aSistematização de experiências
700 1 $aMACHADO, R. A.
700 1 $aCARDOSO, I. M.
700 1 $aSILVA, R. D. M.
700 1 $aMELGAÇO, L.
700 1 $aAMANCIO, C. O. da G.
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Embrapa Agrobiologia (CNPAB) |
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