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	Provedor de dados OceanDocs (86) ArchiMer (21) Infoteca-e (13) AgEcon (8) Ecology and Society (8) IBSS Repository (4) OMA (1) Braz. J. Plant Physiol. (1) Phyton (1) AGRIAMBI (1) Rev. Bras. entomol. (1) Mais... Autor Ba, M. (3) Smakhtin, Vladimir U. (3) Bejaoui, B. (2) Belhassen, M. (2) Boudabous, A. (2) Boukef, I. (2) Harzallah, A. (2) Kreiner, A. (2) Mejri, S. (2) PRADO, R. B. (2) Поликарпов, Г. Г. (2) ALVES, S. de M. (1) Abel, Thomas; National Taipei University; tabel@mail.ntpu.edu.tw (1) Adama Mbaye (1) Agramonte Peñalver, D. (1) Aguila Jiménez, E. (1) Alayse, Anne-marie (1) Aldridge, John (1) Andrade-Castañeda,Hernán J. (1) Anthony, Abigail; University of Rhode Island; abigailanthony@gmail.com (1) Mais... 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Idioma Inglês (97) Francês (23) Português (11) Espanhol (9) Russo (4) Alemão (1) Mais...		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 145 Primeira ... 1 2 3 4 5 6 7 8 ... Última Environmental and social values of river water: examples from the Menik Ganga, Sri Lanka. AgEcon Dissanayake, Priyanka; Smakhtin, Vladimir U.. Many decisions on water allocation in river basins are made on economic grounds. Environmental and social benefits of water should also be considered in river basin management, and attempts should be made to value them similarly. This is not a straightforward task and very few studies have directly addressed this issue to date. In this paper, the Menik Ganga (River) in southern Sri Lanka is used as a case study to attempt and evaluate the costs and benefits of environmental water allocations, referred to as ‘environmental flows’ (EF). In this study, a broad definition of EF is used: the components of EF evaluated include the requirements of the religious festival, the requirements of the Yala National Park, the requirements of the Pilinnawa Coastal Wetland... Tipo: Working or Discussion Paper Palavras-chave: Rivers; Ecosystems; Wetlands; Wildlife; Fisheries; Water allocation; Water requirements; Case studies; Economic evaluation; Environmental Economics and Policy; Research and Development/Tech Change/Emerging Technologies; Resource /Energy Economics and Policy. Ano: 2007 URL: http://purl.umn.edu/91876 On the Optimal Taxation of Common-Pool Resources AgEcon Kossioris, Georgios; Plexousakis, Michael; Xepapadeas, Anastasios; Fe Zeeuw, Aart. Recent research developments in common-pool resource models emphasize the importance of links with ecological systems and the presence of non-linearities, thresholds and multiple steady states. In a recent paper Kossioris et al. (2008) develop a methodology for deriving feedback Nash equilibria for non-linear differential games and apply this methodology to a common-pool resource model of a lake where pollution corresponds to benefits and at the same time affects the ecosystem services. This paper studies the structure of optimal state- dependent taxes that steer the combined economic-ecological system towards the trajectory of optimal management, and provides an algorithm for calculating such taxes. Tipo: Working or Discussion Paper Palavras-chave: Differential Games; Non-linear Feedback Nash Equilibria; Ecosystems; Optimal State-dependent Tax; Environmental Economics and Policy; Q25; C73; C61. Ano: 2010 URL: http://purl.umn.edu/94619 Aerial biomass allometric models for Prosopis affinis Spreng. in native Espinal forests of Argentina AGRIAMBI Sione,Silvana M. J.; Andrade-Castañeda,Hernán J.; Ledesma,Silvia G.; Rosenberger,Leandro J.; Oszust,José D.; Wilson,Marcelo G.. ABSTRACT Estimation of carbon stored in forest ecosystems requires accurate biomass prediction tools. The objective of this study was to determine the individual aerial biomass of Prosopis affinis and its distribution by component, to develop allometric models for the estimation of biomass and to estimate biomass expansion factors (BEF) in native forests of Entre Ríos (Argentina). Dendrometric variables on 30 individuals of different diameter classes were measured. Values of total aerial biomass and component biomass (trunk, branches larger than 5 cm in diameter and branches smaller than 5 cm + leaves, flowers and fruits) were determined using the destructive method. Different models were developed, and the best models were selected according to the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Carbon reservoir; Ecosystems; Fabaceae. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000600467 Epigean ant communities in Atlantic Forest remnants of São Paulo: a comparative study using the guild concept Rev. Bras. entomol. Macedo,Luciano Pacelli Medeiros; Berti Filho,Evoneo; Delabie,Jacques Hubert Charles. Epigean ant communities in Atlantic Forest remnants of São Paulo: a comparative study using the guild concept. The guilds constitute a valuable ecological tool, because they allow conducting comparisons among environments under different conditions. The ants can be used as ecological indicators, mainly for the monitoring of degraded forest areas. The aim of this research was to study guild organization among the epigeous Formicidae living in Atlantic forest remnants of the State of São Paulo, Brazil. Ant collections were performed in three distinct Atlantic forest biome areas: arboreal littoral vegetation ("restinga") (Cananéia), semideciduous seasonal forest (Piracicaba) and dense ombrophylousforest (Pariquera-Açu). After identification, the ants were... Tipo: Info:eu-repo/semantics/article Palavras-chave: Ecological bioindicators; Ecosystems; Environmental monitoring; Formicidae; Hymenoptera. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262011000100012 Utility of basic research in plant/crop physiology in relation to crop improvement: a review and a personal account Braz. J. Plant Physiol. El-Sharkawy,Mabrouk A.. Agricultural research and development plays an essential role in a nation's economic development, providing for food security for an ever-increasing population. In developed countries, the gap between potential and actual yield is largely closed because of a combination of advanced technologies, high-yielding new varieties and the application of agrochemicals in highly mechanized production systems. In most of these countries, agricultural production exceeds national demand, resulting in excess products for export. In many of the developing countries, however, agricultural productivity is still far below what it should be because of multiple technical and socio-economic constraints. Food deficits are the norm in poor and middle-income countries, requiring... Tipo: Info:eu-repo/semantics/article Palavras-chave: Agriculture; Breeding; C4-photosynthesis; Drought-tolerance; Ecophysiology; Ecosystems; Hormones; Photoperiod; Productivity; Soil; Water stress. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000400001 Registros recuperados: 145 Primeira ... 1 2 3 4 5 6 7 8 ... Última

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