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Registro Completo |
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Biblioteca(s): |
Embrapa Clima Temperado. |
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Data corrente: |
15/01/2015 |
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Data da última atualização: |
15/01/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BLANCO, C. C.; SCHEITER, S.; SOSINSKI, E.; FIDELIS, A.; ANAND, M.; PILLAR, V. P. |
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Afiliação: |
CAROLINA CASAGRANDE BLANCO, UFRGS; SIMON SCHEITER, Biodiversität und Klima Forschungszentrum; ENIO EGON SOSINSKI JUNIOR, CPACT; ALESSANDRA FIDELIS, UNESP; MADHUR ANAND, University of Guelph; VALÉRIO D. PILLAR, UFRGS. |
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Título: |
Feedbacks between vegetation and disturbance processes promote long-term persistence of forest-grassland mosaics in south Brazil. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Ecological Modelling, v. 291, p. 224-232, Nov. 2014. |
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ISSN: |
0304-3800 |
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Idioma: |
Inglês |
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Conteúdo: |
Vegetation changes, such as shrub encroachment and forest expansion over grasslands, prairies andsavannas have been related to changes in climatic (mainly rainfall and temperature) and atmosphericconditions (CO2concentration). However, a longstanding question in ecology is how mosaics of forestsand open-canopy ecosystems could persist over millennia in sites where climatic conditions favor forests.Here we tested the influence of interactions between grass-tree competition, environmental hetero-geneity (topography), seed dispersal, initial density and spatial aggregation of vegetation patches anddisturbance behavior (fire) on the long-term coexistence of forests and grasslands in South Brazil. Forthis, we incorporated the adaptive dynamic global vegetation model (aDGVM) into a spatially explicitmodeling approach (2D-aDGVM). Our results showed that recurrent disturbance related to grasses such asfires plays a key role in maintaining the long-term coexistence of forests and grasslands, mainly throughfeedbacks between disturbance frequency and grass biomass. Topographic heterogeneity affected therate of forest expansion by adding spatio-temporal variability in vegetation-fire feedbacks. However, thespatial pattern and connectivity of fire-prone (grasslands) and fire-sensitive (forest) vegetation patcheswere more important to maintain the long-term coexistence of both alternative vegetation states thanthe initial proportion of forest and grasslands patches. The model is the first individual-based DGVM toconsider the combined effects of topography, seed dispersal and fire spread behavior in a spatially explicitapproach. MenosVegetation changes, such as shrub encroachment and forest expansion over grasslands, prairies andsavannas have been related to changes in climatic (mainly rainfall and temperature) and atmosphericconditions (CO2concentration). However, a longstanding question in ecology is how mosaics of forestsand open-canopy ecosystems could persist over millennia in sites where climatic conditions favor forests.Here we tested the influence of interactions between grass-tree competition, environmental hetero-geneity (topography), seed dispersal, initial density and spatial aggregation of vegetation patches anddisturbance behavior (fire) on the long-term coexistence of forests and grasslands in South Brazil. Forthis, we incorporated the adaptive dynamic global vegetation model (aDGVM) into a spatially explicitmodeling approach (2D-aDGVM). Our results showed that recurrent disturbance related to grasses such asfires plays a key role in maintaining the long-term coexistence of forests and grasslands, mainly throughfeedbacks between disturbance frequency and grass biomass. Topographic heterogeneity affected therate of forest expansion by adding spatio-temporal variability in vegetation-fire feedbacks. However, thespatial pattern and connectivity of fire-prone (grasslands) and fire-sensitive (forest) vegetation patcheswere more important to maintain the long-term coexistence of both alternative vegetation states thanthe initial proportion of forest and grasslands patches. The model is the first... Mostrar Tudo |
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Palavras-Chave: |
Pastagem subtropical; Subtropical grasslands. |
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Thesagro: |
Dispersão de semente; Pastagem; Simulação. |
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Thesaurus Nal: |
seed dispersal. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02435naa a2200265 a 4500
001 2005714
005 2015-01-15
008 2014 bl uuuu u00u1 u #d
022 $a0304-3800
100 1 $aBLANCO, C. C.
245 $aFeedbacks between vegetation and disturbance processes promote long-term persistence of forest-grassland mosaics in south Brazil.$h[electronic resource]
260 $c2014
520 $aVegetation changes, such as shrub encroachment and forest expansion over grasslands, prairies andsavannas have been related to changes in climatic (mainly rainfall and temperature) and atmosphericconditions (CO2concentration). However, a longstanding question in ecology is how mosaics of forestsand open-canopy ecosystems could persist over millennia in sites where climatic conditions favor forests.Here we tested the influence of interactions between grass-tree competition, environmental hetero-geneity (topography), seed dispersal, initial density and spatial aggregation of vegetation patches anddisturbance behavior (fire) on the long-term coexistence of forests and grasslands in South Brazil. Forthis, we incorporated the adaptive dynamic global vegetation model (aDGVM) into a spatially explicitmodeling approach (2D-aDGVM). Our results showed that recurrent disturbance related to grasses such asfires plays a key role in maintaining the long-term coexistence of forests and grasslands, mainly throughfeedbacks between disturbance frequency and grass biomass. Topographic heterogeneity affected therate of forest expansion by adding spatio-temporal variability in vegetation-fire feedbacks. However, thespatial pattern and connectivity of fire-prone (grasslands) and fire-sensitive (forest) vegetation patcheswere more important to maintain the long-term coexistence of both alternative vegetation states thanthe initial proportion of forest and grasslands patches. The model is the first individual-based DGVM toconsider the combined effects of topography, seed dispersal and fire spread behavior in a spatially explicitapproach.
650 $aseed dispersal
650 $aDispersão de semente
650 $aPastagem
650 $aSimulação
653 $aPastagem subtropical
653 $aSubtropical grasslands
700 1 $aSCHEITER, S.
700 1 $aSOSINSKI, E.
700 1 $aFIDELIS, A.
700 1 $aANAND, M.
700 1 $aPILLAR, V. P.
773 $tEcological Modelling$gv. 291, p. 224-232, Nov. 2014.
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Registro original: |
Embrapa Clima Temperado (CPACT) |
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| Registros recuperados : 4 | |
| 1. |  | NEVES, M. B. das; LIMA, C. A. B. de; MARTINS, J. F. da S.; GRÜTZMACHER, A. D.; BÜTTOW, G. T.; SILVA, L. F. da; STRIEDER, G. M. Influência do diâmetro de amostras de solo e raízes na avaliação da infestação larval de Oryzophagus oryzae em cultivares de arroz. In: CONGRESSO BRASILEIRO DE ARROZ IRRIGADO, 7., 2011, Balneário Camboriú. Racionalizando recursos e ampliando oportunidades: anais. Itajaí: Epagri, 2011. v. 1. P. 666-669.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 2. | | BÜTTOW, G. T.; MARTINS, J. F. da S.; GRÜTZMACHER, A. D.; SILVA, F. F. da; STRIEDER, G. M.; SILVA, L. F. da; FORNO, G. G. M. D. Relação entre população larval de Oryzophagus oryzae e profundidade da água de irrigação do arroz. In: CONGRESSO BRASILEIRO DE ARROZ IRRIGADO, 8., 2013, Santa Maria. Avaliando cenários para a produção sustentável de arroz: anais. Santa Maria: UFSM; Porto Alegre: Sosbai, 2013.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 3. | | MARTINS, J. F. da S.; ROSA, A. P. S. A. da; MATTOS, M. L. T.; LIMA, C. A. B. de; BÜTTOW, G. T.; STRIEDER, G. M.; SILVA, L. F. da. Efeito da supressão da inundação na população larval de Oryzophagus oryzae e produtividade da cultivar de arroz BRS Querência. In: CONGRESSO BRASILEIRO DE ARROZ IRRIGADO, 7., 2011, Balneário Camboriú. Racionalizando recursos e ampliando oportunidades: anais. Itajaí: Epagri, 2011. v. 1. p. 662-665.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 4. | | MARTINS, J. F. da S.; ROSA, A. P. S. A. da; MATTOS, M. L. T.; LIMA, C. A. B. de; BÜTTOW, G. T.; STRIEDER, G. M.; SILVA, L. F. da; SCIVITTARO, W. B. Influência da drenagem temporária da água de irrigação do arroz na infestação da bicheira-da-raiz e na produtividade da cultivar BRS querência. Pelotas: Embrapa Clima Temperado, 2012. 6 p. (Embrapa Clima Temperado. Circular Técnica, 135).| Biblioteca(s): Embrapa Clima Temperado. |
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| Registros recuperados : 4 | |
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