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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
15/07/2014 |
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Data da última atualização: |
11/02/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
YOUNG, D.; PEROTTO-BALDIVIESO, H. L.; BREWER, T.; HOMER, R.; SANTOS, S. A. |
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Afiliação: |
DYLAN YOUNG, UNIVERSITY OF LEEDS; HUMBERTO L. PEROTTO BALDIVIESO, UNIVERSITY OF LEEDS; TIM BREWER, UNIVERSITY OF LEEDS; RACHEL HOMER, UNIVERSITY OF LEEDS; SANDRA APARECIDA SANTOS, CPAP. |
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Título: |
Monitoring british upland ecosystems with the use of landscape structure as an indicator for state-and-transition models. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Rangeland Ecology & Management, v.67, n.4, p.380-388, july 2014. |
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ISSN: |
1550-7424 |
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DOI: |
10.2111/REM-D-13-00170.1 |
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Idioma: |
Inglês |
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Conteúdo: |
Remote sensing and landscape ecology concepts can provide a useful framework for state-and-transition models (STM) in order to quantify thresholds at different scales, and provide useful information for scientists, land managers, and conservationists in relation to resilience management. The overall aim of this research was to develop a spatially explicit STM to quantify thresholds based on the scale of disturbance processes impacting a grazing system. Specific objectives were to develop a conceptual STM framework for upland grazing ecosystems, to quantify spatial dynamics of stable and degraded pastures, and to assess threshold occurrence. Color aerial photography from Armboth Fell in the English Lake District National Park (United Kingdom) was classified into bare rock, dwarf shrub heath (DSH), and grassland/degraded wet heath (GDWH) in four pastures
with different degrees of grazing pressure. Vegetation communities from these pastures were combined with soils, climate, and landform data to create a conceptual STM framework. Each pasture was sampled with 2-ha plots to quantify DSH and GDWH spatial structure. The proposed STM consisted of two reference and three alternative states. Low?grazing-pressure areas showed significantly higher percentage of DSH cover with larger contiguous patches and lower patch density than high?grazing-pressure areas. Breakpoints, considered to be thresholds, in mean patch area were identified in our data when DSH percentage cover was ,63% and GDWH, >77%. The present study has shown the value of a robust, reliable, and repeatable approach to identify landscape dynamics and integrate it with field data to inform a conceptual STM framework for upland grazing cosystems. It also demonstrates the importance of selecting scales relevant to the predominant disturbance process to test for threshold occurrence, and how this approach can be integrated with current assessment methods for resilience management. MenosRemote sensing and landscape ecology concepts can provide a useful framework for state-and-transition models (STM) in order to quantify thresholds at different scales, and provide useful information for scientists, land managers, and conservationists in relation to resilience management. The overall aim of this research was to develop a spatially explicit STM to quantify thresholds based on the scale of disturbance processes impacting a grazing system. Specific objectives were to develop a conceptual STM framework for upland grazing ecosystems, to quantify spatial dynamics of stable and degraded pastures, and to assess threshold occurrence. Color aerial photography from Armboth Fell in the English Lake District National Park (United Kingdom) was classified into bare rock, dwarf shrub heath (DSH), and grassland/degraded wet heath (GDWH) in four pastures
with different degrees of grazing pressure. Vegetation communities from these pastures were combined with soils, climate, and landform data to create a conceptual STM framework. Each pasture was sampled with 2-ha plots to quantify DSH and GDWH spatial structure. The proposed STM consisted of two reference and three alternative states. Low?grazing-pressure areas showed significantly higher percentage of DSH cover with larger contiguous patches and lower patch density than high?grazing-pressure areas. Breakpoints, considered to be thresholds, in mean patch area were identified in our data when DSH percentage cover was ,63% and G... Mostrar Tudo |
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Palavras-Chave: |
Peatland; Resilience; Thresholds. |
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Thesaurus Nal: |
grazing; landscape ecology; remote sensing. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02735naa a2200265 a 4500
001 1990683
005 2015-02-11
008 2014 bl --- 0-- u #d
022 $a1550-7424
024 7 $a10.2111/REM-D-13-00170.1$2DOI
100 1 $aYOUNG, D.
245 $aMonitoring british upland ecosystems with the use of landscape structure as an indicator for state-and-transition models.
260 $c2014
520 $aRemote sensing and landscape ecology concepts can provide a useful framework for state-and-transition models (STM) in order to quantify thresholds at different scales, and provide useful information for scientists, land managers, and conservationists in relation to resilience management. The overall aim of this research was to develop a spatially explicit STM to quantify thresholds based on the scale of disturbance processes impacting a grazing system. Specific objectives were to develop a conceptual STM framework for upland grazing ecosystems, to quantify spatial dynamics of stable and degraded pastures, and to assess threshold occurrence. Color aerial photography from Armboth Fell in the English Lake District National Park (United Kingdom) was classified into bare rock, dwarf shrub heath (DSH), and grassland/degraded wet heath (GDWH) in four pastures with different degrees of grazing pressure. Vegetation communities from these pastures were combined with soils, climate, and landform data to create a conceptual STM framework. Each pasture was sampled with 2-ha plots to quantify DSH and GDWH spatial structure. The proposed STM consisted of two reference and three alternative states. Low?grazing-pressure areas showed significantly higher percentage of DSH cover with larger contiguous patches and lower patch density than high?grazing-pressure areas. Breakpoints, considered to be thresholds, in mean patch area were identified in our data when DSH percentage cover was ,63% and GDWH, >77%. The present study has shown the value of a robust, reliable, and repeatable approach to identify landscape dynamics and integrate it with field data to inform a conceptual STM framework for upland grazing cosystems. It also demonstrates the importance of selecting scales relevant to the predominant disturbance process to test for threshold occurrence, and how this approach can be integrated with current assessment methods for resilience management.
650 $agrazing
650 $alandscape ecology
650 $aremote sensing
653 $aPeatland
653 $aResilience
653 $aThresholds
700 1 $aPEROTTO-BALDIVIESO, H. L.
700 1 $aBREWER, T.
700 1 $aHOMER, R.
700 1 $aSANTOS, S. A.
773 $tRangeland Ecology & Management$gv.67, n.4, p.380-388, july 2014.
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Registro original: |
Embrapa Pantanal (CPAP) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
15/04/1997 |
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Data da última atualização: |
15/04/1997 |
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Autoria: |
VELOSO, R. F.; CARVALHO, E. R. O.; GOULART, A. M. |
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Título: |
Economic an financial performance evaluation of a farm in the Brazilian savannas. |
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Ano de publicação: |
1995 |
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Fonte/Imprenta: |
In: INTERNATIONAL SYMPOSIUM ON SYSTEMS APPROACHES FOR AGRICULTURAL DEVELOPMENT, 2., 1995, Los Banos, Philippines. Proceedings: application of systems approaches at the farm and regional levels. Los Banos: IRRI/Dordrecht: Kluwer, 1997. |
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Volume: |
v.1. |
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Páginas: |
p.177-190. |
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Idioma: |
Inglês |
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Conteúdo: |
The Brazilian savannas (cerrados) represent one of the last major agricultural frontiers in the southem hemisphere. The Japaneses government has been interested in promoting the rational development of this region through pilot projects with full support of the Brazilian government and selected agricultural producers organized in cooperatives. Some farm management and system research tools have been proposed to provide new instruments for planning sustainable development in environment, economic and social terms for the cerrados. Before formulating a mathematical model for the agricultural production process of the cerrados, under given environmental, social economic and political constraints, a data base contraining current financial and economic performance parameters of an established farming system, together with some qualitative information on job creation and essential infrastructure, is being developed. The major objective is to develop a framework for ex-ante evaluation of integrated regional planning schemes based on evaluation of real-world data. This evaluation effort is in progress and is generating farm management information that will be used to develop a comprehensive farming sytem model. Other institutions in Latin America such as CIAT in Colombia and the 'Universidade de Uberlandia - Minas Gerais State' have shown interest in this modelling approach, and a cooperative effort could be established in the near future to develop new instruments to support policy markers in agricultural and rural sectors. MenosThe Brazilian savannas (cerrados) represent one of the last major agricultural frontiers in the southem hemisphere. The Japaneses government has been interested in promoting the rational development of this region through pilot projects with full support of the Brazilian government and selected agricultural producers organized in cooperatives. Some farm management and system research tools have been proposed to provide new instruments for planning sustainable development in environment, economic and social terms for the cerrados. Before formulating a mathematical model for the agricultural production process of the cerrados, under given environmental, social economic and political constraints, a data base contraining current financial and economic performance parameters of an established farming system, together with some qualitative information on job creation and essential infrastructure, is being developed. The major objective is to develop a framework for ex-ante evaluation of integrated regional planning schemes based on evaluation of real-world data. This evaluation effort is in progress and is generating farm management information that will be used to develop a comprehensive farming sytem model. Other institutions in Latin America such as CIAT in Colombia and the 'Universidade de Uberlandia - Minas Gerais State' have shown interest in this modelling approach, and a cooperative effort could be established in the near future to develop new instruments to support polic... Mostrar Tudo |
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Palavras-Chave: |
Agricultural development; Aspecto economico; Avaliacao; Economic situation; Evaluation; Regional planning; Sustainability; Sustentabilidade. |
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Thesagro: |
Administração Agrícola; Cerrado; Desenvolvimento Agrícola; Fazenda; Planejamento Regional. |
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Thesaurus NAL: |
farm management. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02664naa a2200337 a 4500
001 1552695
005 1997-04-15
008 1995 bl uuuu u00u1 u #d
100 1 $aVELOSO, R. F.
245 $aEconomic an financial performance evaluation of a farm in the Brazilian savannas.
260 $c1995
300 $ap.177-190. v.1.
490 $vv.1.
520 $aThe Brazilian savannas (cerrados) represent one of the last major agricultural frontiers in the southem hemisphere. The Japaneses government has been interested in promoting the rational development of this region through pilot projects with full support of the Brazilian government and selected agricultural producers organized in cooperatives. Some farm management and system research tools have been proposed to provide new instruments for planning sustainable development in environment, economic and social terms for the cerrados. Before formulating a mathematical model for the agricultural production process of the cerrados, under given environmental, social economic and political constraints, a data base contraining current financial and economic performance parameters of an established farming system, together with some qualitative information on job creation and essential infrastructure, is being developed. The major objective is to develop a framework for ex-ante evaluation of integrated regional planning schemes based on evaluation of real-world data. This evaluation effort is in progress and is generating farm management information that will be used to develop a comprehensive farming sytem model. Other institutions in Latin America such as CIAT in Colombia and the 'Universidade de Uberlandia - Minas Gerais State' have shown interest in this modelling approach, and a cooperative effort could be established in the near future to develop new instruments to support policy markers in agricultural and rural sectors.
650 $afarm management
650 $aAdministração Agrícola
650 $aCerrado
650 $aDesenvolvimento Agrícola
650 $aFazenda
650 $aPlanejamento Regional
653 $aAgricultural development
653 $aAspecto economico
653 $aAvaliacao
653 $aEconomic situation
653 $aEvaluation
653 $aRegional planning
653 $aSustainability
653 $aSustentabilidade
700 1 $aCARVALHO, E. R. O.
700 1 $aGOULART, A. M.
773 $tIn: INTERNATIONAL SYMPOSIUM ON SYSTEMS APPROACHES FOR AGRICULTURAL DEVELOPMENT, 2., 1995, Los Banos, Philippines. Proceedings: application of systems approaches at the farm and regional levels. Los Banos: IRRI/Dordrecht: Kluwer, 1997.
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Embrapa Cerrados (CPAC) |
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