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Estimación de variables dasométricas del bosque templado de Hidalgo, México mediante datos espectrales y del Inventario Nacional Forestal. Colegio de Postgraduados
Muñoz RuIz, Miguel Ángel.
Los métodos basados en la percepción remota son herramientas importantes para la medición de variables biofísicas del bosque a un costo menor y a una escala espacial y temporal mayor. En este trabajo se analiza la relación existente entre datos del Inventario Nacional Forestal y de Suelos (INFyS) y datos espectrales provenientes de imágenes de la plataforma SPOT correspondientes al bosque templado y bosque mesófilo de Hidalgo, México. Las estimaciones del área basal (AB), volumen (VOL) y cobertura arbórea (COB) se realizaron mediante cuatro enfoques: 1) Análisis de regresión lineal múltiple, 2) El procedimiento no paramétrico K vecino más cercano (K-nn), 3) Estimadores de razón y regresión, y 4) Inventario forestal tradicional. Las estimaciones totales...
Palavras-chave: Percepción remota; Inventario forestal; Area basal; Volumen; Cobertura arbórea; Remote sensing; Forest inventory; Basal area; Volume; Tree cover; Forestal; Maestría.
Ano: 2012 URL: http://hdl.handle.net/10521/1710
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Population dynamics of Millettia stuhlmannii Taub. in Ha-Makhuvha, Vhembe district of Limpopo Province, South Africa Phyton
Tshisikhawe,MP; Siaga,NM; Bhat,RB.
The population dynamics of Millettia stuhlmannii Taub. was investigated to determine its current structure in Ha-Makhuvha. Plant populations are being utilized only for medicinal purposes under the close supervision of a local headman. It is used in treating stomach aches, as well as protecting homesteads and properties. Given the dependence of many rural communities on plants for medicine, timber, and various other non-timber resources, plant populations experience human pressures. These pressures demand great effort for in situ conservation and associated management needs of medicinal plants. Efforts also apply to sustainable usage and ex situ cultivation practices. The size-class distribution coupled with crown health and bark removal were used to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Millettia stuhlmannii; Size-class distribution; Crown health; Stem circumference; Basal area; Mortality.
Ano: 2011 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572011000200002
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Assessing biomass based on canopy height profiles using airborne laser scanning data in eucalypt plantations Scientia Agricola
Silva,André Gracioso Peres; Görgens,Eric Bastos; Campoe,Otávio Camargo; Alvares,Clayton Alcarde; Stape,José Luiz; Rodriguez,Luiz Carlos Estraviz.
This study aimed to map the stem biomass of an even-aged eucalyptus plantation in southeastern Brazil based on canopy height profile (CHPs) statistics using wall-to-wall discrete return airborne laser scanning (ALS), and compare the results with alternative maps generated by ordinary kriging interpolation from field-derived measurements. The assessment of stem biomass with ALS data was carried out using regression analysis methods. Initially, CHPs were determined to express the distribution of laser point heights in the ALS cloud for each sample plot. The probability density function (pdf) used was the Weibull distribution, with two parameters that in a secondary task, were used as explanatory variables to model stem biomass. ALS metrics such as height...
Tipo: Info:eu-repo/semantics/article Palavras-chave: LiDAR; Basal area; Biometric model; Forest inventory; Fast-growing plantations.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000600504
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