Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 5
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
A Theoretical and Empirical Analysis of Conservation Reserve Program Participation under Uncertainty AgEcon
Isik, Murat.
This paper develops theoretical and empirical models to understand how farmers formulate their participation strategies when deciding to enroll in the Conservation Reserve Program (CRP) under uncertainty. A theoretical model is employed to obtain the impacts of various factors on the optimal bidding strategies. A selectivity-based econometric model is then used to estimate the probability of enrollment and determinants of rental payments. The theoretical results indicate that the optimal bid is positively related to the expected farming income and environmental benefit scores, and it is negatively related to the degree of risk aversion and the variability of returns. The econometric model shows that land benefits, land attributes, farmer...
Tipo: Conference Paper or Presentation Palavras-chave: Conservation programs; Land retirement; Risk aversion; Uncertainty.; Farm Management.
Ano: 2005 URL: http://purl.umn.edu/19264
Imagem não selecionada

Imprime registro no formato completo
From Risk Assessment to Knowledge Mapping: Science, Precaution, and Participation in Disease Ecology Ecology and Society
Stirling, Andy C.; Science and Technology Policy Research, University of Sussex; a.c.stirling@sussex.ac.uk; Scoones, Ian; Institute for Development Studies, University of Sussex; i.scoones@ids.ac.uk.
Governance of infectious disease risks requires understanding of often indeterminate interactions between diverse, complex, open, and dynamic human and natural systems. In the face of these challenges, worldwide policy making affords disproportionate status to “ science-based” risk-assessment methods. These reduce multiple, complex dimensions to simple quantitative parameters of “outcomes” and “probabilities,” and then re-aggregate across diverse metrics, contexts, and perspectives to yield a single ostensibly definitive picture of risk. In contrast, more precautionary or participatory approaches are routinely portrayed as less rigorous, complete, or robust. Yet, although conventional...
Tipo: Peer-Reviewed Reports Palavras-chave: Ambiguity; Ignorance; Participation; Precaution; Risk; Uncertainty..
Ano: 2009
Imagem não selecionada

Imprime registro no formato completo
Resilience, Flexibility and Adaptive Management - - Antidotes for Spurious Certitude? Ecology and Society
Gunderson, Lance; Emory University; lgunder@emory.edu.
In many cases, a predicate of adaptive environmental assessment and management (AEAM) has been a search for flexibility in management institutions, or for resilience in the ecological system prior to structuring actions that are designed for learning. Many of the observed impediments to AEAM occur when there is little or no resilience in the ecological components (e.g., when there is fear of an ecosystem shift to an unwanted stability domain), or when there is a lack of flexibility in the extant power relationships among stakeholders. In these cases, a pragmatic solution is to seek to restore resilience or flexibility rather than to pursue a course of broad-scale, active adaptive management. Restoration of resilience and flexibility may occur through novel...
Tipo: Peer-Reviewed Reports Palavras-chave: Active learning; Adaptive management; AEAM; Ecological resilience; Flexibility; Florida Everglades; Policy crisis; Restoration; Stability domain; Stakeholders; Surprise; Uncertainty..
Ano: 1999
Imagem não selecionada

Imprime registro no formato completo
The Reflective Practitioner: Learning and Teaching in Community-based Forest Management Ecology and Society
The world's natural forests, whose rich ecosystems support wildlife and human populations, are declining. In my 17 years as an international community forester, observing this decline has hardened my resolve to look for answers "outside the box." This paper is a reflection of some of the important lessons I am learning: to keep an open mind at all times, to remember that I can never be certain of the outcome of any given effort, to control my biases, to listen carefully, and to find common ground.
Tipo: Peer-Reviewed Reports Palavras-chave: Action research; Collaborative forest management; Community forestry; Community-based forest management; Development theory; Education; Joint forest management; Participatory forest management; Uncertainty..
Ano: 2001
Imagem não selecionada

Imprime registro no formato completo
Uncertainties in projecting climate-change impacts in marine ecosystems ArchiMer
Payne, Mark R.; Barange, Manuel; Cheung, William W. L.; Mackenzie, Brian R.; Batchelder, Harold P.; Cormon, Xochitl; Eddy, Tyler D.; Fernandes, Jose A.; Hollowed, Anne B.; Jones, Miranda C.; Link, Jason S.; Neubauer, Philipp; Ortiz, Ivonne; Queirós, Ana M.; Paula, José Ricardo.
Projections of the impacts of climate change on marine ecosystems are a key prerequisite for the planning of adaptation strategies, yet they are inevitably associated with uncertainty. Identifying, quantifying, and communicating this uncertainty is key to both evaluating the risk associated with a projection and building confidence in its robustness. We review how uncertainties in such projections are handled in marine science. We employ an approach developed in climate modelling by breaking uncertainty down into (i) structural (model) uncertainty, (ii) initialization and internal variability uncertainty, (iii) parametric uncertainty, and (iv) scenario uncertainty. For each uncertainty type, we then examine the current state-of-the-art in assessing and...
Tipo: Text Palavras-chave: Climate change; Initialization uncertainty; Parametric uncertainty; Projections; Scenario uncertainty; Structural uncertainty; Uncertainty..
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00301/41220/40392.pdf
Registros recuperados: 5
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional