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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados; Embrapa Florestas. |
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Data corrente: |
04/09/2003 |
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Data da última atualização: |
04/09/2003 |
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Autoria: |
MEIRELLES, M. L.; OLIVEIRA, R. C. de; RIBEIRO, J. F.; VIVALDI, L. j.; RODRIGUES, L. A.; SILVA, G. P. |
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Título: |
Utilização do método de interseção na linha em levantamento quantitativo do estrato herbáceo do cerrado. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Boletim do Herbário Ezechias Paulo Heringer, Brasília, v. 9, p. 60-68, jul. 2002. |
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Idioma: |
Português |
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Conteúdo: |
Poucos levantamentos fitossociologicos do estrato herbaceo das fitofisionomias do Cerrado foram ate agora realizados. Este trabalho tem como objetivo apresentar a utilizacao do metodo da intersecao na linha na obtencao da riqueza, indice de diversidade, frequencias e coberturas, absolutas e relativas, das especies do estrato herbaceo de Cerrado sentido restrito. A area de estudo pertence a reserva legal do projeto de colonizacao agricola Gerais de Balsas (Maranhao, Brasil). Foram demarcadas 7 linhas de 50 metros subdivididas a cada metro e a partir da projecao da linha, eram anotadas as especies presentes nessa intersecao e o comprimento da linha que cada especie ocupava. A estabilizacao da curva especie-metro ocorreu a partir de 40 metros. O levantamento de cada linha de 50 metros levou entre 2 e 3 horas. Nas sete linhas estudadas, foram obtidas entre 58 e 73 especies com indices de diversidade de Shannon, variando de 2,78 a 3,01. O metodo de intersecao na linha demonstrou ser de facil utilizacao sendo uma opcao viavel na obtencao de parametros fitossociologicos do estrato herbaceo de Cerrado sentido restrito. |
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Palavras-Chave: |
Brasil; Estrato herbáceo; Fitossociologia; Herbaceous layer; Maranhão; Savana; Savanna. |
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Thesagro: |
Cerrado. |
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Thesaurus Nal: |
Brazil; phytosociology. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01980naa a2200301 a 4500
001 1567020
005 2003-09-04
008 2002 bl uuuu u00u1 u #d
100 1 $aMEIRELLES, M. L.
245 $aUtilização do método de interseção na linha em levantamento quantitativo do estrato herbáceo do cerrado.
260 $c2002
520 $aPoucos levantamentos fitossociologicos do estrato herbaceo das fitofisionomias do Cerrado foram ate agora realizados. Este trabalho tem como objetivo apresentar a utilizacao do metodo da intersecao na linha na obtencao da riqueza, indice de diversidade, frequencias e coberturas, absolutas e relativas, das especies do estrato herbaceo de Cerrado sentido restrito. A area de estudo pertence a reserva legal do projeto de colonizacao agricola Gerais de Balsas (Maranhao, Brasil). Foram demarcadas 7 linhas de 50 metros subdivididas a cada metro e a partir da projecao da linha, eram anotadas as especies presentes nessa intersecao e o comprimento da linha que cada especie ocupava. A estabilizacao da curva especie-metro ocorreu a partir de 40 metros. O levantamento de cada linha de 50 metros levou entre 2 e 3 horas. Nas sete linhas estudadas, foram obtidas entre 58 e 73 especies com indices de diversidade de Shannon, variando de 2,78 a 3,01. O metodo de intersecao na linha demonstrou ser de facil utilizacao sendo uma opcao viavel na obtencao de parametros fitossociologicos do estrato herbaceo de Cerrado sentido restrito.
650 $aBrazil
650 $aphytosociology
650 $aCerrado
653 $aBrasil
653 $aEstrato herbáceo
653 $aFitossociologia
653 $aHerbaceous layer
653 $aMaranhão
653 $aSavana
653 $aSavanna
700 1 $aOLIVEIRA, R. C. de
700 1 $aRIBEIRO, J. F.
700 1 $aVIVALDI, L. j.
700 1 $aRODRIGUES, L. A.
700 1 $aSILVA, G. P.
773 $tBoletim do Herbário Ezechias Paulo Heringer, Brasília$gv. 9, p. 60-68, jul. 2002.
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Registro original: |
Embrapa Cerrados (CPAC) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agricultura Digital. Para informações adicionais entre em contato com cnptia.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Agricultura Digital. |
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Data corrente: |
10/02/2014 |
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Data da última atualização: |
08/01/2020 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
SOUSSANA, J.-F.; BARIONI, L. G.; ARI, T. B.; CONANT, R.; GERBER, P.; HAVLIK, P.; ICKOWICZ, A.; HOWDEN, M. |
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Afiliação: |
JEAN-FRANÇOIS SOUSSANA, Inra; LUIS GUSTAVO BARIONI, CNPTIA; TAMARA BEN ARI, Inra; RICH CONANT, Colorado State University; PIERRE GERBER, FAO; PETR HAVLIK, International Institute for Applied Systems Analysis; ALEXANDRE ICKOWICZ, Cirad; MARK HOWDEN, CSIRO. |
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Título: |
Managing grassland systems in a changing climate: the search for practical solutions. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
In: INTERNATIONAL GRASSLAND CONGRESS, 22., 2013, Sydney. Revitalising grasslands to sustain our communities: proceedings. Orange New South Wales: New South Wales Department of Primary Industries, 2013. |
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Páginas: |
p. 10-27. |
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ISBN: |
978-1-74256-543-9 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract. By the end of the XXIst century, a global temperature rise between 1.5 and 4°C compared to 1980-1999 and CO2 concentrations in the range 550-900 ppm are expected, together with an increased frequency of extreme climatic events (heat waves, droughts, and heavy rain) that is likely to negatively affect grassland production and livestock systems in a number of world regions. Grassland management has a large potential to mitigate livestock greenhouse gas emissions at a low (or even negative) cost, by combining a moderate intensification, the restoration of degraded pastures and the development of silvo-pastoral systems. Climate change vulnerability will be highest in regional hot spots with high exposure to climatic extremes and low adaptive capacity, such as extensive systems in dryland areas. Biome shifts, with expansion or contraction of the grassland biome, are projected by models. Resistance, resilience and transformation strategies can be used for grassland adaptation. With sown grasslands, adaptation options include changes in forage species (e.g. use of C 4 grasses and of annual species) and genotypes and the use of grass-legume mixtures. Grazing management can be adapted to increase the resilience of plant communities to climatic variability. Our understanding of the synergies and trade-offs between adaptation and mitigation in the grassland sector is still limited and requires further research. Provided this understanding is gained, climate smart grassland systems that sustainably increase productivity and resilience (adaptation), reduce greenhouse gas emissions (mitigation), and enhance food security and development could be promoted. By reducing productivity gaps and increasing livestock production efficiency, they would also contribute to mitigate climate change from tropical deforestation and expansion of grasslands into savannahs. MenosAbstract. By the end of the XXIst century, a global temperature rise between 1.5 and 4°C compared to 1980-1999 and CO2 concentrations in the range 550-900 ppm are expected, together with an increased frequency of extreme climatic events (heat waves, droughts, and heavy rain) that is likely to negatively affect grassland production and livestock systems in a number of world regions. Grassland management has a large potential to mitigate livestock greenhouse gas emissions at a low (or even negative) cost, by combining a moderate intensification, the restoration of degraded pastures and the development of silvo-pastoral systems. Climate change vulnerability will be highest in regional hot spots with high exposure to climatic extremes and low adaptive capacity, such as extensive systems in dryland areas. Biome shifts, with expansion or contraction of the grassland biome, are projected by models. Resistance, resilience and transformation strategies can be used for grassland adaptation. With sown grasslands, adaptation options include changes in forage species (e.g. use of C 4 grasses and of annual species) and genotypes and the use of grass-legume mixtures. Grazing management can be adapted to increase the resilience of plant communities to climatic variability. Our understanding of the synergies and trade-offs between adaptation and mitigation in the grassland sector is still limited and requires further research. Provided this understanding is gained, climate smart grassland sy... Mostrar Tudo |
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Palavras-Chave: |
Gases do efeito estufa; Mitigação; Mudanças climáticas; Pastos. |
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Thesagro: |
Gado. |
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Thesaurus NAL: |
Climate change; Greenhouse gases; Livestock; Pastures. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02916nam a2200325 a 4500
001 1979259
005 2020-01-08
008 2013 bl uuuu u00u1 u #d
020 $a978-1-74256-543-9
100 1 $aSOUSSANA, J.-F.
245 $aManaging grassland systems in a changing climate$bthe search for practical solutions.$h[electronic resource]
260 $aIn: INTERNATIONAL GRASSLAND CONGRESS, 22., 2013, Sydney. Revitalising grasslands to sustain our communities: proceedings. Orange New South Wales: New South Wales Department of Primary Industries$c2013
300 $ap. 10-27.
520 $aAbstract. By the end of the XXIst century, a global temperature rise between 1.5 and 4°C compared to 1980-1999 and CO2 concentrations in the range 550-900 ppm are expected, together with an increased frequency of extreme climatic events (heat waves, droughts, and heavy rain) that is likely to negatively affect grassland production and livestock systems in a number of world regions. Grassland management has a large potential to mitigate livestock greenhouse gas emissions at a low (or even negative) cost, by combining a moderate intensification, the restoration of degraded pastures and the development of silvo-pastoral systems. Climate change vulnerability will be highest in regional hot spots with high exposure to climatic extremes and low adaptive capacity, such as extensive systems in dryland areas. Biome shifts, with expansion or contraction of the grassland biome, are projected by models. Resistance, resilience and transformation strategies can be used for grassland adaptation. With sown grasslands, adaptation options include changes in forage species (e.g. use of C 4 grasses and of annual species) and genotypes and the use of grass-legume mixtures. Grazing management can be adapted to increase the resilience of plant communities to climatic variability. Our understanding of the synergies and trade-offs between adaptation and mitigation in the grassland sector is still limited and requires further research. Provided this understanding is gained, climate smart grassland systems that sustainably increase productivity and resilience (adaptation), reduce greenhouse gas emissions (mitigation), and enhance food security and development could be promoted. By reducing productivity gaps and increasing livestock production efficiency, they would also contribute to mitigate climate change from tropical deforestation and expansion of grasslands into savannahs.
650 $aClimate change
650 $aGreenhouse gases
650 $aLivestock
650 $aPastures
650 $aGado
653 $aGases do efeito estufa
653 $aMitigação
653 $aMudanças climáticas
653 $aPastos
700 1 $aBARIONI, L. G.
700 1 $aARI, T. B.
700 1 $aCONANT, R.
700 1 $aGERBER, P.
700 1 $aHAVLIK, P.
700 1 $aICKOWICZ, A.
700 1 $aHOWDEN, M.
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