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| 149. |  | PAGANI, J. A.; VALENTIM, J. F.; COSTA, A. L. da. Introdução e avaliação de cultivares de capim-elefante no estado do Acre. In: SIMPÓSIO DO TRÓPICO ÚMIDO, 1., 1984, Belém, PA. Anais... Belém, PA: EMBRAPA-CPATU, 1986. v. 5, p. 65-70. (EMBRAPA-CPATU. Documentos, 36).| Biblioteca(s): Embrapa Acre. |
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| 150. | | PAGANI, J. A.; VALENTIM, J. F.; COSTA, A. L. da. Introdução e avaliação de gramíneas forrageiras de corte no Acre. In: SIMPÓSIO DO TRÓPICO ÚMIDO, 1., 1984, Belém, PA. Resumos... Belém, PA: EMBRAPA-CPATU, 1984. p. 321-322. (EMBRAPA-CPATU. Documentos, 31).| Biblioteca(s): Embrapa Acre. |
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| 157. | | GARRETT, R.; NILES, M.; GIL, J.; VALENTIM, J. F. Enabling conditions for integrated crop and livestock systems in the United States, Brazil, and New Zealand: A comparative analysis of incentives and barriers across three regions. In: WORLD CONGRESS ON INTEGRATED CROP-LIVESTOCK-FOREST SYSTEMS; INTERNATIONAL SYMPOSIUM ON INTEGRATED CROP-LIVESTOCK SYSTEMS, 3., 2015, Brasília, DF. Towards sustainable intensification: proceedings. Brasília, DF: Embrapa, 2015. 1 p. Resumo AJPS.| Biblioteca(s): Embrapa Acre. |
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| Registros recuperados : 446 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Acre. |
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Data corrente: |
24/05/2021 |
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Data da última atualização: |
28/06/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 4 |
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Autoria: |
BARRETT, K.; VALENTIM, J. F.; TURNER II, B. L. |
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Afiliação: |
KIRSTEN BARRETT, Graduate School of Geography, Clark University, Worcester, MA, USA; JUDSON FERREIRA VALENTIM, CPAF-AC; B. L. TURNER II, School of Geographical Sciences and Urban Planning, and School of Sustainability, Arizona State University, Tempe, AZ, USA. |
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Título: |
Ecosystem services from converted land: the importance of tree cover in Amazonian pastures. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Urban Ecosystems, v. 16, p. 573-591, 2013. |
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ISSN: |
1083-8155 |
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DOI: |
https://doi.org/10.1007/s11252-012-0280-1 |
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Idioma: |
Inglês |
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Conteúdo: |
Deforestation is responsible for a substantial fraction of global carbon emissions and changes in surface energy budgets that affect climate. Deforestation losses include wildlife and human habitat, and myriad forest products on which rural and urban societies depend for food, fiber, fuel, fresh water, medicine, and recreation. Ecosystem services gained in the transition from forests to pasture and croplands, however, are often ignored in assessments of the impact of land cover change. The role of converted lands in tropical areas in terms of carbon uptake and storage is largely unknown. Pastures represent the fastest-growing form of converted land use in the tropics, even in some areas of rapid urban expansion. Tree biomass stored in these areas spans a broad range, depending on tree cover. Trees in pasture increase carbon storage, provide shade for cattle, and increase productivity of forage material. As a result, increasing fractional tree cover can provide benefits land managers as well as important ecosystem services such as reducing conversion pressure on forests adjacent to pastures. This study presents an estimation of fractional tree cover in pasture in a dynamic region on the verge of large-scale land use change. An appropriate sampling interval is established for similar studies, one that balances the need for independent samples of sufficient number to characterize a pasture in terms of fractional tree cover. This information represents a useful policy tool for government organizations and NGOs interested in encouraging ecosystem services on converted lands. Using high spatial resolution Rio Branco, Brazil. A semivariogram and devolving spatial resolution are employed to determine the coarsest sampling interval that may be used, minimizing effects of spatial autocorrelation. The coarsest sampling interval that minimizes spatial dependence was about 22 m. The area-weighted fractional tree cover for the study area was 1.85 %, corrected for a slight bias associated with the coarser sampling resolution. The pastures sampled for fractional tree cover were divided between ?high? and ?low? tree cover, which may be the result of intentional incorporation of arboreal species in pasture. Further research involving those ranchers that have a higher fractional tree cover may indicate ways to promote the practice on a broader scale in the region. MenosDeforestation is responsible for a substantial fraction of global carbon emissions and changes in surface energy budgets that affect climate. Deforestation losses include wildlife and human habitat, and myriad forest products on which rural and urban societies depend for food, fiber, fuel, fresh water, medicine, and recreation. Ecosystem services gained in the transition from forests to pasture and croplands, however, are often ignored in assessments of the impact of land cover change. The role of converted lands in tropical areas in terms of carbon uptake and storage is largely unknown. Pastures represent the fastest-growing form of converted land use in the tropics, even in some areas of rapid urban expansion. Tree biomass stored in these areas spans a broad range, depending on tree cover. Trees in pasture increase carbon storage, provide shade for cattle, and increase productivity of forage material. As a result, increasing fractional tree cover can provide benefits land managers as well as important ecosystem services such as reducing conversion pressure on forests adjacent to pastures. This study presents an estimation of fractional tree cover in pasture in a dynamic region on the verge of large-scale land use change. An appropriate sampling interval is established for similar studies, one that balances the need for independent samples of sufficient number to characterize a pasture in terms of fractional tree cover. This information represents a useful policy tool for g... Mostrar Tudo |
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Palavras-Chave: |
Cambio climático; Cubierta (plantas); Deforestación; Pastizales; Servicios ecosistémicos; Serviços ecossistêmicos. |
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Thesagro: |
Desmatamento; Impacto Ambiental; Mudança Climática; Pastagem; Planta de Cobertura. |
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Thesaurus NAL: |
Amazonia; Canopy; Climate change; Deforestation; Ecosystem services; Environmental impact; Pastures. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/223388/1/27136.pdf
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|
Marc: |
LEADER 03495naa a2200385 a 4500
001 2131969
005 2021-06-28
008 2013 bl uuuu u00u1 u #d
022 $a1083-8155
024 7 $ahttps://doi.org/10.1007/s11252-012-0280-1$2DOI
100 1 $aBARRETT, K.
245 $aEcosystem services from converted land$bthe importance of tree cover in Amazonian pastures.$h[electronic resource]
260 $c2013
520 $aDeforestation is responsible for a substantial fraction of global carbon emissions and changes in surface energy budgets that affect climate. Deforestation losses include wildlife and human habitat, and myriad forest products on which rural and urban societies depend for food, fiber, fuel, fresh water, medicine, and recreation. Ecosystem services gained in the transition from forests to pasture and croplands, however, are often ignored in assessments of the impact of land cover change. The role of converted lands in tropical areas in terms of carbon uptake and storage is largely unknown. Pastures represent the fastest-growing form of converted land use in the tropics, even in some areas of rapid urban expansion. Tree biomass stored in these areas spans a broad range, depending on tree cover. Trees in pasture increase carbon storage, provide shade for cattle, and increase productivity of forage material. As a result, increasing fractional tree cover can provide benefits land managers as well as important ecosystem services such as reducing conversion pressure on forests adjacent to pastures. This study presents an estimation of fractional tree cover in pasture in a dynamic region on the verge of large-scale land use change. An appropriate sampling interval is established for similar studies, one that balances the need for independent samples of sufficient number to characterize a pasture in terms of fractional tree cover. This information represents a useful policy tool for government organizations and NGOs interested in encouraging ecosystem services on converted lands. Using high spatial resolution Rio Branco, Brazil. A semivariogram and devolving spatial resolution are employed to determine the coarsest sampling interval that may be used, minimizing effects of spatial autocorrelation. The coarsest sampling interval that minimizes spatial dependence was about 22 m. The area-weighted fractional tree cover for the study area was 1.85 %, corrected for a slight bias associated with the coarser sampling resolution. The pastures sampled for fractional tree cover were divided between ?high? and ?low? tree cover, which may be the result of intentional incorporation of arboreal species in pasture. Further research involving those ranchers that have a higher fractional tree cover may indicate ways to promote the practice on a broader scale in the region.
650 $aAmazonia
650 $aCanopy
650 $aClimate change
650 $aDeforestation
650 $aEcosystem services
650 $aEnvironmental impact
650 $aPastures
650 $aDesmatamento
650 $aImpacto Ambiental
650 $aMudança Climática
650 $aPastagem
650 $aPlanta de Cobertura
653 $aCambio climático
653 $aCubierta (plantas)
653 $aDeforestación
653 $aPastizales
653 $aServicios ecosistémicos
653 $aServiços ecossistêmicos
700 1 $aVALENTIM, J. F.
700 1 $aTURNER II, B. L.
773 $tUrban Ecosystems$gv. 16, p. 573-591, 2013.
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