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| Registros recuperados: 68 | |
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| MARENCO,Ricardo A.; VIEIRA,Gil; GONÇALVES,José F. de C.. |
| In the Brazilian Amazon, large areas of abandoned lands may revert to secondary forest. In the process, pioneer tree species have an important role to restore productivity in old fields and improve environmental conditions. To determine potential photosynthesis (Apot), stomatal conductance (g), transpiration (E), and leaf micronutrient concentrations in Ochroma pyramidale (Cav. ex Lam.) Urban a study was carried out in the Brazilian Amazon (01o 51' S; 60o 04' W). Photosynthetic parameters were measured at increasing [CO2], saturating light intensity (1 mmol (photons) m-2 s-1), and ambient temperature. The rate of electron-transport (J), Apot,and water-use efficiency (WUE) increased consistently at increasing internal CO2 concentration (Ci). Conversely,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Balsa wood; Electron-transport rate; Reforestation; Stomatal conductance; Transpiration; Water-use efficiency. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672003000100023 |
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| Batista, Araína Hulmann; Motta, Antônio Carlos Vargas; Reissmann, Carlos Bruno; Schneider, Thays; Martins, Iara Lang; Hashimoto, Maurício. |
| Soils with high acidity and low exchangeable bases may be responsible for low yields of Pinus taeda in a forest plantation at Jaguariaíva, Paraná State, Brazil. The aim of this study was to evaluate the effect of liming and fertilisation, applied over litter, on two selected areas with Pinus taeda plantations. Soil, litter and pine needles were evaluated for K, Ca and Mg concentrations and soil acidity parameters. Seven treatments were applied: (i) complete (N, P, K, Zn, Cu, B, Mo, and lime); (ii) without N, P, and K; (iii) without Zn, Cu, B, and Mo; (iv) without K; (v) without Zn; (vi) without lime; and (vii) control (without nutrients and lime). Soil samples were collected at five soil depths (0-5, 5-10, 10-20, 20-40 and 40-60 cm) simultaneously with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ciência do Solo nutrient deficiency; Reforestation; Litter; Soil reaction; Acidification Nutrição Mineral de Plantas. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/18061 |
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| Costa, Adriana Albuquerque da; Gonçalves, Iolanda de Sena; Dias, Herly Carlos Teixeira. |
| The objective was to evaluate a reforestation carried out by the goldwashers. The studied area is situated along the Gualaxo do Norte river margins in Mariana - MG. The seedlings were received by donation of regional nurseries and were planted on December of 2006 in hole of 25x25 cm and plant spacing 3x2 meters. The evaluations were carried through on March of 2007. The height was measured with metric ribbon and the diameter, 5 cm above the ground, was done by using digital pachymeter. They planted 538 seedlings of 20 different species, pertaining to twelve botanical families. The most abundant species were Enterolobium contortisiliquum (96), Mimosa schomburgkii (76) and Chorisia speciosa (45). It was not possible to identify 19 individuals due to... |
| Tipo: Article |
Palavras-chave: Riparian forest; Forest hydrology; Reforestation. |
| Ano: 2007 |
URL: http://hdl.handle.net/2315/110 |
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| Sharma, Divya; Department of Biology, McGill University; divya.sharma2@mail.mcgill.ca; Vergara-Asenjo, Gerardo; Department of Biology, McGill University; Instituto Forestal de Chile; gevergara@gmail.com; Potvin, Catherine; Department of Biology, McGill University; Smithsonian Tropical Research Institute; catherine.potvin@mcgill.ca. |
| Knowledge of the interplay between ecological and social influences in the context of land-use decision-making is sparse. To help fill this gap, we conducted participatory land-cover mapping in an indigenous territory of eastern Panama to identify factors that influenced household land-use decisions. The map illustrated a mosaic of land cover dominated by pasture. Primary discourse on influences from 35 semistructured interviews with landowners, women, and youth emphasized economic concerns, such as subsistence, and social-cultural factors, such as reticence to abandon traditional agriculture. Multivariate analysis showed that timing of family settlement helped determine proportion of forest cover, and place of origin helped determine proportion of short... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Eastern Panama; Deforestation; Forest cover; Indigenous migration; Land-cover mapping; Land-use change; Land-use decisions; Livelihood strategies; Local knowledge; Reforestation; Social-ecological landscape. |
| Ano: 2015 |
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| Saxena, K. G.; Jawaharlal Nehru University; kgsaxena@jnuniv.ernet.in; Rao, K.S.; CISHME, University of Delhi, South Campus, New Delhi-17, India; srkottapalli@yahoo.com; Sen, K. K. C; G. B. Pant Institute of Himalayan Environment and Development;; Maikhuri, R. K.; G.B. Pant Institute of Himalayan Environment and Development; rkmaikhuri@yahoo.com; Semwal, R. L.; ;. |
| Losses of forest cover, biodiversity, agricultural productivity, and ecosystem services in the Himalayan mountain region are interlinked problems and threats to the sustainable livelihoods of 115 x 106 mountain people as well as the inhabitants of the adjoining Indo-gangetic plains. Until the 1970s, environmental conservation, food security, and rural economic development were treated as independent sectors. The poor outcomes of sector-oriented approaches catalyzed efforts to address environmental and socioeconomic problems concurrently. The identification of "key" natural resource management interventions is an important dimension of integrated management. Projects to rehabilitate the degraded lands that cover 40% of the Indian Himalaya could be key... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Bamboo; Community decision making; Himalaya; India; Integrated natural resource management; Land rehabilitation; Medicinal plants; Reforestation; Village.. |
| Ano: 2001 |
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| Newton, Adrian C; Bournemouth University, Bournemouth, UK; anewton@bournemouth.ac.uk; Premoli, Andrea C; Laboratorio Ecotono, Universidad Nacional del Comahue, Bariloche, Argentina; andrea.premoli@gmail.com. |
| Forest Landscape Restoration (FLR) involves the ecological restoration of degraded forest landscapes, with the aim of benefiting both biodiversity and human well-being. We first identify four fundamental principles of FLR, based on previous definitions. We then critically evaluate the application of these principles in practice, based on the experience gained during an international, collaborative research project conducted in six dry forest landscapes of Latin America. Research highlighted the potential for FLR; tree species of high socioeconomic value were identified in all study areas, and strong dependence of local communities on forest resources was widely encountered, particularly for fuelwood. We demonstrated that FLR can be achieved through both... |
| Tipo: Peer-Reviewed Synthesis |
Palavras-chave: Biodiversity; Conservation; Dryland; Ecological restoration; Forest landscape; Latin America; Reforestation; Rehabilitation. |
| Ano: 2012 |
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| Yackulic, Charles B; Department of Ecology, Evolution and Environmental Biology, Columbia University ; c_yackulic@yahoo.com; Fagan, Matthew ; Department of Ecology, Evolution and Environmental Biology, Columbia University; mef2153@columbia.edu; Jain, Meha; Department of Ecology, Evolution and Environmental Biology, Columbia University; mj2415@columbia.edu; Jina, Amir; Sustainability Program, Columbia University; amirjina@gmail.com; Lim, Yili; Department of Ecology, Evolution and Environmental Biology, Columbia University ; yilime@gmail.com; Marlier, Miriam; Department of Earth and Environmental Sciences, Columbia University; miriammarlier@gmail.com; Muscarella, Robert; Department of Ecology, Evolution and Environmental Biology, Columbia University; rm2824@columbia.edu; Adame, Patricia; Forest Research Centre (CIFOR-INIA), Madrid, Spain ; adame.patricia@inia.es; DeFries, Ruth; Department of Ecology, Evolution and Environmental Biology, Columbia University; rd2402@columbia.edu; Uriarte, Maria; Department of Ecology, Evolution and Environmental Biology, Columbia University; mu2126@columbia.edu. |
| Forest transitions (FT) occur when socioeconomic development leads to a shift from net deforestation to reforestation; these dynamics have been observed in multiple countries across the globe, including the island of Puerto Rico in the Caribbean. Starting in the 1950s, Puerto Rico transitioned from an agrarian to a manufacturing and service economy reliant on food imports, leading to extensive reforestation. In recent years, however, net reforestation has leveled off. Here we examine the drivers of forest transition in Puerto Rico from 1977 to 2000 at two subnational, nested spatial scales (municipality and barrio) and over two time periods (1977-1991 and 1991-2000). This study builds on previous work by considering the social and biophysical factors that... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Agricultural abandonment; Deforestation; Forest transition; Puerto Rico; Reforestation. |
| Ano: 2011 |
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| MELO, J. T. de; RESCK, D. V. S.. |
| RESUMO: O objetivo deste trabalho foi comparar procendências de Eucalyptus camaldulensis quanto à queda de serrapilheira e o retorno de nutrientes ao solo por essa via, no cerrado, em Planaltina-DF. O experimento foi em uma área localizada a 1000 m de altitude.O solo é Latossolo Vermelho Ditrófico típico textura argilosa. As argilosa. As procedências avaliadas foram: 10911 de Emu Creek, Queensland; 9856 de Agnew Road, West Autralian e 10557 de Kimberly Area, West Australian. No centro das parcelas de 7 x 7 plantas, colocaram-se coletores de 1,0 x 1,0 m, ao nível do solo. De setembro de 1995 a agosto de 2000, mensalmente, o material foi recolhido e separado em folhas, galhos, frutos cascas e determinada matéria seca. Antes da separação, retirava-se uma... |
| Tipo: Folhetos |
Palavras-chave: Ciclagem; Cycling; Carbono; Eucalipto; Fertilidade do Solo; Matéria Orgânica; Nutriente; Reflorestamento; Serapilheira; Carbon; Nutrients; Reforestation; Organic matter; Soil fertility. |
| Ano: 2003 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568115 |
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| Registros recuperados: 68 | |
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