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	Provedor de dados Ciencia e Investigación Agraria (3) Autor Miranda,Marcelo (3) Bonacic,Cristian (1) Bonacic,Cristián (1) Condal,Alfonso (1) Gerstmann,Catalina (1) Gómez,Miguel (1) Ibarra,José Tomás (1) Petitpas,Robert (1) Sanhueza,Doris (1) Mais... Palavra-chave Acacia caven (1) Altitudinal gradients (1) Andean wetlands ecosystems (1) EVI (1) Fragmentation (1) Human pressure (1) Landscape change (1) MODIS (1) Native vegetation recovery (1) Potential productivity (1) Spatial anisotropy (1) Species richness (1) Temperate forest (1) Vegetal diversity (1) Mais... Tipo do documento Journal article (3) Ano 2016 (1) 2010 (1) 2009 (1) País Chile (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Description of space-time variability of the potential productivity of Acacia caven espinales based on MODIS images and the Enhanced Vegetation Index (EVI) Ciencia e Investigación Agraria Gerstmann,Catalina; Miranda,Marcelo; Condal,Alfonso. Acacia caven espinales are important communities of sclerophyllus vegetation in central Chile. To increase its productivity, it is necessary to study the community’s condition, their relationships with the surrounding environment and the interactions between them. The present study was carried out in a series of three years: 2004, 2005 and 2006. The 68 EVI images used represent the amount of radiation absorbed and emitted (from a Moderate Resolution Imaging Spectroradiometer) for the vegetation, which is related to the photosynthetic performance. The results show that during the summer and autumn seasons, there was more space homogeneity and less photosynthetic activity and potential productivity of the communities; in winter and spring, the period in... Tipo: Journal article Palavras-chave: Acacia caven; Potential productivity; EVI; MODIS; Spatial anisotropy. Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000100006 Spatial patterns over a 24-year period show an increase in native vegetation cover and decreased fragmentation in Andean temperate landscapes, Chile Ciencia e Investigación Agraria Petitpas,Robert; Ibarra,José Tomás; Miranda,Marcelo; Bonacic,Cristián. R. Petitpas, J.T. Ibarra, M. Miranda, and C. Bonacic. 2016. Spatial patterns in a 24-year period show a case of increase forest cover and decrease fragmentation in Andean temperate landscapes, Chile. Cien. Inv. Agr. 43(3):384-395. Changes in landscape pattern were studied in a temperate landscape of the La Araucanía Region, Chile. Using aerial photographs from 1983 and 2007, we created land use/land cover maps. We then quantified the changes in composition and configuration by using landscape metrics and an adjacency matrix. By 2007, the dominant land cover had changed from agriculture to native vegetation. Residential areas showed the largest relative increase (670%) and had significant adjacency with native vegetation. The native vegetation increased by... Tipo: Journal article Palavras-chave: Fragmentation; Landscape change; Native vegetation recovery; Temperate forest. Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000300004 Species richness, diversity and human activities in an elevation gradient of a high-ecosystem in Lagunas Huascoaltinas, Atacama Region, Chile Ciencia e Investigación Agraria Sanhueza,Doris; Miranda,Marcelo; Gómez,Miguel; Bonacic,Cristian. The relationship between species richness, diversity and grazing frequency along an altitudinal gradient (1900-3400 m) of an Andean ecosystem indicates that there is an intense human pressure on vegetation use. To identify the vascular flora and its conservation, 20 sites were sampled in two visits during 2006. We identified 79 taxa, including 62.03% native species, 22.78% adventitious and 8.86% endemic (the remaining 6.33% was identified only at the genus level). Some genera were underrepresented. We also observed latitudinal limits (Alstremeria andina), monotypic genera (Geoffroea, Kurzamra, Phragmites, Tessaria and Salix) and monogeneric families (Buddlejaceae, Ephedraceae, Equisetaceae, Malesherbiaceae, Salicaceae and Oxalidaceae). Moreover, we found... Tipo: Journal article Palavras-chave: Altitudinal gradients; Species richness; Vegetal diversity; Human pressure; Andean wetlands ecosystems. Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000300008 Registros recuperados: 3 Primeira ... 1 ... Última

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