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Registros recuperados: 9
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Evaluation of Ecological Carrying Capacity of Henan Province under the Sustainable Development AgEcon
Jiang, Xiao-ping.
Based on the overview of social economy of Henan Province, I probe into the concept and evaluation of ecological carrying capacity. By using the ecological footprint analysis and the data of various kinds of land supply of Henan Province from 2000 to 2008, the ecological carrying capacity of Henan Province is analyzed. It is unveiled that inharmonious population, natural resources and economic resources affects the efficiency of the sustainable development of ecological carrying capacity of Henan Province; the underdeveloped economy of Henan Province impacts the sustainable development of ecological carrying capacity of Henan Province and the overburdened population lead to the insufficiency of ecological carrying capacity. Around protecting the threshold...
Tipo: Journal Article Palavras-chave: Ecological carrying capacity; Henan Province; Ecological footprint analysis; Threshold; China; Agribusiness.
Ano: 2010 URL: http://purl.umn.edu/96056
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Integrating local knowledge and science: economic consequences of driftwood harvest in a changing climate Ecology and Society
Jones, Chas E; International Arctic Research Center, University of Alaska Fairbanks; chas@chasjones.com; Kielland, Knut; Institute of Arctic Biology, University of Alaska Fairbanks; kkielland@alaska.edu; Hinzman, Larry D; International Arctic Research Center, University of Alaska Fairbanks; ldhinzman@alaska.edu; Schneider, William S; Oral History Department, University of Alaska Fairbanks; wsschneider@alaska.edu.
The integration of local knowledge and science represents an opportunity to enhance the understanding of interrelations among climate, hydrology, and socioeconomic systems while providing mutual benefits to scientists and rural communities. Insight from rural Alaskans helped to identify a social-ecological threshold used to model potential driftwood harvest from the Yukon River. Information from residents of Tanana, Alaska, was combined with scientific data to model driftwood harvest rates. Modeling results estimated that between 1980 and 2010, hydrologic factors alone were responsible for a 29% decrease in the annual wood harvest, which approximately balanced a 23% reduction in wood demand because of a decline in number of households. The...
Tipo: Peer-Reviewed Reports Palavras-chave: Biomass; Climate; Driftwood; Economics; Flood; Hydrology; Large woody debris; Local knowledge; Participatory research; Social-ecological model; Threshold.
Ano: 2015
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Nonlinearities in the US corn-ethanol-oil price system AgEcon
Serra, Teresa; Zilberman, David; Gil, Jose Maria; Goodwin, Barry K..
We use a smooth transition vector error correction model to assess price relationships within the US ethanol industry. Daily ethanol, corn and oil futures prices observed from mid-2005 to mid-2007 are used in the analysis. Results indicate the existence of an equilibrium relationship between ethanol, corn and oil prices. However, only ethanol prices adjust, in a non-linear fashion, to deviations from this long-run parity. Generalized impulse response functions indicate that a shock to both oil and corn prices causes a change in ethanol prices of the same sign. Ethanol responses usually reach a peak after about 10 days of the initial shock and fade away within 35 days.
Tipo: Conference Paper or Presentation Palavras-chave: Biofuels; United States; Cointegration; Threshold; Resource /Energy Economics and Policy.
Ano: 2008 URL: http://purl.umn.edu/6512
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Novel ecosystems in the Anthropocene: a revision of the novel ecosystem concept for pragmatic applications Ecology and Society
Morse, Nathaniel B.; Department of Natural Resources and the Environment, University of New Hampshire; Earth Systems Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire; nat.morse@unh.edu; Pellissier, Paul A.; Department of Natural Resources and the Environment, University of New Hampshire; Earth Systems Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire; pellissier.paul@gmail.com; Cianciola, Elisabeth N.; Department of Natural Resources and the Environment, University of New Hampshire; epf28@wildcats.unh.edu; Brereton, Richard L.; Department of Natural Resources and the Environment, University of New Hampshire; rich.brereton@gmail.com; Sullivan, Marleigh M.; Department of Natural Resources and the Environment, University of New Hampshire; sullivanm12@gmail.com; Shonka, Nicholas K.; Department of Natural Resources and the Environment, University of New Hampshire; nkw9@wildcats.unh.edu; Wheeler, Tessa B.; Department of Natural Resources and the Environment, University of New Hampshire; tbq2@wildcats.unh.edu; McDowell, William H.; Department of Natural Resources and the Environment, University of New Hampshire; Bill.McDowell@unh.edu.
Ecologists have developed terminology to distinguish ecosystems based on the degree of human alteration. To this end, ecosystems can be characterized as “novel ecosystems,” “impacted ecosystems,” or “designed ecosystems,” depending on the role of human management in ecosystem development and effects on ecosystem properties. Properly classifying an ecosystem as novel, impacted, or designed has critical implications for its conservation and management, but a broadly applicable definition for a “novel ecosystem” does not exist. We have provided a formal definition of “novel ecosystem” that facilitates its use in practical applications and have described four...
Tipo: Peer-Reviewed Insight Palavras-chave: Ecosystem management; Novel ecosystem; Resilience; Restoration; Threshold.
Ano: 2014
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Price Transmission Asymmetries and Nonlinearities in the International Coffee Supply Chain AgEcon
Lee, Jun; Gomez, Miguel I..
We examine two distinct and important dimensions (e.g. symmetry vs. asymmetry and linearity vs. nonlinearity) of price transmission from international to retail coffee prices in France, Germany and the United States. We show that ignoring these two features of the price transmission process may lead to misleading impact assessments resulting from the elimination of International Coffee Agreement (ICA) in 1990. Our results confirm the presence of threshold effects in both periods (ICA and post ICA) in all three countries. Our estimates show that, in the long-run, the speed of adjustment toward equilibrium becomes faster during the post-ICA period in France and Germany. Our results suggest that, for these two countries, changes in international prices did...
Tipo: Conference Paper or Presentation Palavras-chave: Threshold; Nonlinearity; Asymmetric Price Transmission; Roasted Coffee; Germany; United States; France; Error Correction Model; Demand and Price Analysis; International Relations/Trade; C32; Q17.
Ano: 2011 URL: http://purl.umn.edu/104024
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QUALITY OF PROCESSING TOMATO FRUITS IN COMPETITION WITH Solanum americanum Planta Daninha
PORTUGAL,J.; REGO,F.C.; MOREIRA,I.; VIDAL,R.A..
ABSTRACT Five experiments were conducted to evaluate the hypothesis that Solanum americanum density and time of coexistence affect the quality of processing tomato fruit. The tomato crop was established using either the direct drilling or the transplanting technique. The factors evaluated consisted of weed density (from 0 up to 6 plants m-2) and time of weed interference (early bloom stage, full flowering stage, fruit filling, and harvest time). The effects of competition on tomato fruit quality were analysed using a multiple model. Tomato variables evaluated included industrial fruit types (which depended on ripeness and disease infection) and soluble solids level(obrix). Tomato fruit quality is dependent on the factors tested. Under low densities (< 6...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Weed competition; Critical period; Density-dependent processes; Threshold.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000400689
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Tipping Points and Ambiguity in the Economics of Climate Change AgEcon
Lemoine, Derek M.; Traeger, Christian P..
Replaced with revised version of paper Feb 13, 2012 available at http://purl.umn.edu/120349
Tipo: Report Palavras-chave: Threshold; Climate; Integrated assessment; Regime shift; Ambiguity; Uncertainty; Dynamic programming; Social cost of carbon; Tipping point; Carbon tax; Environmental Economics and Policy; Risk and Uncertainty; Q54; D90; D81.
Ano: 2010 URL: http://purl.umn.edu/98127
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Tipping points and ambiguity in the economics of climate change AgEcon
Lemoine, Derek M.; Traeger, Christian P..
Replaces CUDARE Working Paper no. 1111, with the title; Tipping Points and Ambiguity in the Integrated Assessment of Climate Change, issued 12-26-2010
Tipo: Working Paper Palavras-chave: Tipping point; Threshold; Regime shift; Ambiguity; Climate; Uncertainty; Integrated assessment; Dynamic programming; Social cost of carbon; Carbon tax; Political Economy; Resource /Energy Economics and Policy; Q54; D90; D81.
Ano: 2011 URL: http://purl.umn.edu/120349
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Transmissão de preços entre mercados regionais de carne de frango no Brasil AgEcon
Mattos, Leonardo Bornacki de; Lirio, Viviani Silva; Lima, Joao Eustaquio de; Campos, Antonio Carvalho.
Non-negligible transaction costs restrict the transmission of price shock between markets. The aim of this work was to analyze the effects of transaction costs on the spatial integration of the internal market for chicken meat, from 1998 to 2007. The applied methodology was based on the Threshold Cointegration Analysis. The results indicate the presence of significant barriers to the price transmission between the markets, existing probably due to the transaction costs. Prices are not very sensitive to eventual deviations of the long run equilibrium. It could also be noted that a relatively long period is necessary to eliminate price shocks, and the price transmission process is asymmetric.
Tipo: Journal Article Palavras-chave: Market integration; Transaction costs; Chicken meat; Cointegration; Threshold; Demand and Price Analysis.
Ano: 2010 URL: http://purl.umn.edu/94798
Registros recuperados: 9
Primeira ... 1 ... Última
 

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