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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
17/06/2020 |
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Data da última atualização: |
17/06/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ANDRADE, D. F. C. de; RUSCHEL, A. R.; SCHWARTZ, G.; CARVALHO, J. O. P. de; HUMPHRIES, S.; GAMA, J. R. V. |
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Afiliação: |
Dárlison Fernandes Carvalho de Andrade, Chico Mendes Institute for Biodiversity Conservation / UFOPA; ADEMIR ROBERTO RUSCHEL, CPATU; GUSTAVO SCHWARTZ, CPATU; João Olegário Pereira de Carvalho, UFRA; Shoana Humphries, Green Value; João Ricardo Vasconcellos Gama, UFOPA. |
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Título: |
Forest resilience to fire in eastern Amazon depends on the intensity of pre-fire disturbance. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Forest Ecology and Management, v. 472, article 118258, Sep. 2020. |
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DOI: |
https://doi.org/10.1016/j.foreco.2020.118258 |
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Idioma: |
Inglês |
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Conteúdo: |
Researchers and managers face the challenge of how to determine when frequency, spatial extent and magnitude of disturbances can overcome the resilience of forest ecosystems. Among the disturbances in tropical forests, the mid- and long-term impacts of fire are still poorly known, especially how fire interacts with selective logging. In this study, we approached the two following questions in relation to dense ombrophilous forests with a history of selective logging: How does fire impact forest recovery? What is the relationship between pre-fire forest conditions and post-fire dynamics? We used data for trees with DBH ? 5 cm from 36 permanent plots of 0.25-ha (50 m × 50 m) in an area of dense ombrophilous forest monitored over 31 years in the Tapajós National Forest, in Brazil?s eastern Amazon. The area is under forest management that includes logging, the application of post-harvesting silvicultural treatments and an accidental fire. To determine the effects of pre-fire disturbances (logging and thinning) on basal area (G), mortality rate (MR) and recruitment rate (RR), a repeated measures ANOVA was applied. The post-fire forest recovery was also assessed by looking at changes in G, MR and RR. These variables were evaluated through a Linear Mixed Effect Model. In the post-fire period, there was a combined effect of logging commercial species, thinning non-commercial species (F = 9.255; p-value < 0.01) and time (F = 20.210; p-value < 0.01) in G, with no fire effect (F = 0.710; p-value = 0.406). Our study found the dense ombrophilous forest to be resilient enough to recover from logging, thinning, and a superficial fire, and that logging intensity is a determinant factor in forest dynamics. The forest in our control area with no history of previous strong and frequent disturbances was more resistant to fire in terms of lower mortality rates than the logged and thinned areas. In the short-term, the fire affected mainly the dynamics of smaller trees (DBH < 20 cm). In the med-term (15 years after the fire), we observed no fire effects on the reduction of basal area in any of the treatments and the forest maintained a continuous recovery of its lost stocks. MenosResearchers and managers face the challenge of how to determine when frequency, spatial extent and magnitude of disturbances can overcome the resilience of forest ecosystems. Among the disturbances in tropical forests, the mid- and long-term impacts of fire are still poorly known, especially how fire interacts with selective logging. In this study, we approached the two following questions in relation to dense ombrophilous forests with a history of selective logging: How does fire impact forest recovery? What is the relationship between pre-fire forest conditions and post-fire dynamics? We used data for trees with DBH ? 5 cm from 36 permanent plots of 0.25-ha (50 m × 50 m) in an area of dense ombrophilous forest monitored over 31 years in the Tapajós National Forest, in Brazil?s eastern Amazon. The area is under forest management that includes logging, the application of post-harvesting silvicultural treatments and an accidental fire. To determine the effects of pre-fire disturbances (logging and thinning) on basal area (G), mortality rate (MR) and recruitment rate (RR), a repeated measures ANOVA was applied. The post-fire forest recovery was also assessed by looking at changes in G, MR and RR. These variables were evaluated through a Linear Mixed Effect Model. In the post-fire period, there was a combined effect of logging commercial species, thinning non-commercial species (F = 9.255; p-value < 0.01) and time (F = 20.210; p-value < 0.01) in G, with no fire effect (F = 0.71... Mostrar Tudo |
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Palavras-Chave: |
Exploração madeireira; Tratamento silvicultural. |
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Thesagro: |
Árvore; Floresta Tropical; Mortalidade. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 03002naa a2200253 a 4500
001 2123327
005 2020-06-17
008 2020 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.foreco.2020.118258$2DOI
100 1 $aANDRADE, D. F. C. de
245 $aForest resilience to fire in eastern Amazon depends on the intensity of pre-fire disturbance.$h[electronic resource]
260 $c2020
520 $aResearchers and managers face the challenge of how to determine when frequency, spatial extent and magnitude of disturbances can overcome the resilience of forest ecosystems. Among the disturbances in tropical forests, the mid- and long-term impacts of fire are still poorly known, especially how fire interacts with selective logging. In this study, we approached the two following questions in relation to dense ombrophilous forests with a history of selective logging: How does fire impact forest recovery? What is the relationship between pre-fire forest conditions and post-fire dynamics? We used data for trees with DBH ? 5 cm from 36 permanent plots of 0.25-ha (50 m × 50 m) in an area of dense ombrophilous forest monitored over 31 years in the Tapajós National Forest, in Brazil?s eastern Amazon. The area is under forest management that includes logging, the application of post-harvesting silvicultural treatments and an accidental fire. To determine the effects of pre-fire disturbances (logging and thinning) on basal area (G), mortality rate (MR) and recruitment rate (RR), a repeated measures ANOVA was applied. The post-fire forest recovery was also assessed by looking at changes in G, MR and RR. These variables were evaluated through a Linear Mixed Effect Model. In the post-fire period, there was a combined effect of logging commercial species, thinning non-commercial species (F = 9.255; p-value < 0.01) and time (F = 20.210; p-value < 0.01) in G, with no fire effect (F = 0.710; p-value = 0.406). Our study found the dense ombrophilous forest to be resilient enough to recover from logging, thinning, and a superficial fire, and that logging intensity is a determinant factor in forest dynamics. The forest in our control area with no history of previous strong and frequent disturbances was more resistant to fire in terms of lower mortality rates than the logged and thinned areas. In the short-term, the fire affected mainly the dynamics of smaller trees (DBH < 20 cm). In the med-term (15 years after the fire), we observed no fire effects on the reduction of basal area in any of the treatments and the forest maintained a continuous recovery of its lost stocks.
650 $aÁrvore
650 $aFloresta Tropical
650 $aMortalidade
653 $aExploração madeireira
653 $aTratamento silvicultural
700 1 $aRUSCHEL, A. R.
700 1 $aSCHWARTZ, G.
700 1 $aCARVALHO, J. O. P. de
700 1 $aHUMPHRIES, S.
700 1 $aGAMA, J. R. V.
773 $tForest Ecology and Management$gv. 472, article 118258, Sep. 2020.
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Embrapa Amazônia Oriental (CPATU) |
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Biblioteca(s): |
Embrapa Suínos e Aves. |
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Data corrente: |
01/12/2020 |
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Data da última atualização: |
01/12/2020 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
SILVA, Z. da; LUNKES, C. M.; MATIELLO, C. T.; PANDOLFI, J. R. C.; TAVERNARI, F. de C.; MARQUES, M. G. |
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Afiliação: |
ZIGOMAR DA SILVA, UDESC/Lages; CAMILA MAIARA LUNKES, IFC/Concórdia; CAMILA TORBEZZ MATIELLO, IFC/Concórdia; JOSE RODRIGO CLAUDIO PANDOLFI, CNPSA; FERNANDO DE CASTRO TAVERNARI, CNPSA; MARIANA GROKE MARQUES, CNPSA. |
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Título: |
Efeito da suplementação dietética com selênio sobre arquitetura histológica testicular de galos. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
In: JORNADA DE INICIAÇÃO CIENTÍFICA, 14., 2020, Concórdia. Anais... Concórdia: Embrapa Suínos e Aves: UNC, 2020. p. 68-69. |
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Idioma: |
Português |
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Thesagro: |
Alimentação Suplementar; Galo; Histologia Animal; Reprodução Animal; Selênio; Testículo. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/218509/1/final95171.pdf
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Marc: |
LEADER 00792nam a2200229 a 4500
001 2127375
005 2020-12-01
008 2020 bl uuuu u00u1 u #d
100 1 $aSILVA, Z. da
245 $aEfeito da suplementação dietética com selênio sobre arquitetura histológica testicular de galos.$h[electronic resource]
260 $aIn: JORNADA DE INICIAÇÃO CIENTÍFICA, 14., 2020, Concórdia. Anais... Concórdia: Embrapa Suínos e Aves: UNC, 2020. p. 68-69.$c2020
650 $aAlimentação Suplementar
650 $aGalo
650 $aHistologia Animal
650 $aReprodução Animal
650 $aSelênio
650 $aTestículo
700 1 $aLUNKES, C. M.
700 1 $aMATIELLO, C. T.
700 1 $aPANDOLFI, J. R. C.
700 1 $aTAVERNARI, F. de C.
700 1 $aMARQUES, M. G.
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