Con el propósito de identificar en el medio natural, los primeros estadíos de crecimiento de las plántulas de “Uña de Gato”, bejucos trepadores con valor medicinal representativos del Bosque Nacional Alexander Von Humboldt se describen las plántulas de Uncaria tomentosa (Willdernow ex Roemer & Schultes) D.C. y U. guianensis (Aublet) Gmelin obtenidas mediante germinación en vivero semidescubierto. Entre otros caracteres observados, útiles para el reconocimiento taxonómico, se tienen las modalidades de germinación, estructura y organización de los cotiledones, del hipocótilo y el epicótilo, complementados en la descripción de los protófilos y metáfilos.

O presente trabalho trata do estudo da dendrologia, distribuição geográfica e status de conservação de plantas de U. guianensis (Aubl.) J.F. Gmel. e U. tomentosa (Willd. ex Roem. & Schult.) DC. de interesse medicinal, com ocorrência no Estado do Acre, Brasil. A pesquisa consistiu na coleta de material botânico, levantamento e estudo das exsicatas de herbários do Brasil e outros países da América do Sul, complementada pela revisão bibliográfica das espécies na literatura e nos sítios especializados. São apresentadas as descrições morfológicas, ilustrações, mapeamento dos espécimes e a determinação da situação populacional das duas espécies.

La presente investigación presenta como objetivo principal las características anatómicas y propiedades físicas y mecánicas de una nueva especie endémica del Perú reportada en 2005, Vochysia kosnipatae Huamantupa (Alco kaspi), procedente de plantación experimental de ocho años de San Gabán, Departamento de Puno (Perú). Se colectaron cinco trozas de 1.30 m por árbol al azar de una población de 18 árboles. Luego se obtuvieron tablones centrales de 8 cm; a partir de ellos se elaboraron las probetas en una carpintería, para posterormente evaluar las probetas en los laboratorios de anatomía de la madera UNAMAD y tecnología de la madera de UNALM. Los procedimientos se fundamentaron en metodologías de las Normas Técnicas Peruanas COPANT y IAWA. Los resultados difunden el primer reporte de la anatomía y propiedades físicas de la madera de V. kosnipatae Huamantupa (Alco kaspi...

El objetivo del presente estudio fue caracterizar los componentes químicos y principios activos del ácido piroleñoso obtenido de bambú leñoso (Guadua sarcocarpa), pisonay (Erythrina ulei) y cetico (Cecropia sciadophylla), utilizando un horno piloto de destilación seca de la madera. El experimento se desarrolló en las instalaciones de la Sub Estación Experimental-EE Agraria San Gabán (Puno). Se utilizó un diseño DBCA para el análisis de la obtención del ácido piroleñoso a partir de las tres especies utilizando destilación seca a 350 °C por 180 minutos. Para determinar los compuestos orgánicos se realizó un análisis de cromatografía de gases ACG. Para evaluar diferencias significativas en el rendimiento de ácido piroleñoso entre las tres especies se utilizaron el análisis de varianza (ANVA). El ANVA mostró diferencias significativas para el rendimiento de ácido pi...

The study analyzes the conservation value of forests assigned to indigenous populations of the Peruvian Amazon: San Jacinto and Puerto Arturo in Madre de Dios, communities with different realities in terms of conservation and forest management. Two scenarios prevail here: The San Jacinto indigenous community with 7 033,98 ha of forest, is characterized by disorder and the development of activities that put the community at risk (gold mining), while Puerto Arturo with 3 731 ha is a community committed to the management and conservation of its resources. By means of the Contingent Valuation Method (CVM) through the dichotomous logit model we try to define the willingness of the individuals to accept compensation (WAC) on proposed prices of a hypothetical scenario. The results show that the average annual WAC to implement the environmental program was S/ 20,46 (USD 6,30) and S/ 14,84 (USD 4...

The study analyzes the conservation value of forests assigned to indigenous populations of the Peruvian Amazon: San Jacinto and Puerto Arturo in Madre de Dios, communities with different realities in terms of conservation and forest management. Two scenarios prevail here: The San Jacinto indigenous community with 7 033,98 ha of forest, is characterized by disorder and the development of activities that put the community at risk (gold mining), while Puerto Arturo with 3 731 ha is a community committed to the management and conservation of its resources. By means of the Contingent Valuation Method (CVM) through the dichotomous logit model we try to define the willingness of the individuals to accept compensation (WAC) on proposed prices of a hypothetical scenario. The results show that the average annual WAC to implement the environmental program was S/ 20,46 (USD 6,30) and S/ 14,84 (USD 4...

The study analyzes the conservation value of forests assigned to indigenous populations of the Peruvian Amazon: San Jacinto and Puerto Arturo in Madre de Dios, communities with different realities in terms of conservation and forest management. Two scenarios prevail here: The San Jacinto indigenous community with 7 033,98 ha of forest, is characterized by disorder and the development of activities that put the community at risk (gold mining), while Puerto Arturo with 3 731 ha is a community committed to the management and conservation of its resources. By means of the Contingent Valuation Method (CVM) through the dichotomous logit model we try to define the willingness of the individuals to accept compensation (WAC) on proposed prices of a hypothetical scenario. The results show that the average annual WAC to implement the environmental program was S/ 20,46 (USD 6,30) and S/ 14,84 (USD 4...

The study analyzes the conservation value of forests assigned to indigenous populations of the Peruvian Amazon: San Jacinto and Puerto Arturo in Madre de Dios, communities with different realities in terms of conservation and forest management. Two scenarios prevail here: The San Jacinto indigenous community with 7 033,98 ha of forest, is characterized by disorder and the development of activities that put the community at risk (gold mining), while Puerto Arturo with 3 731 ha is a community committed to the management and conservation of its resources. By means of the Contingent Valuation Method (CVM) through the dichotomous logit model we try to define the willingness of the individuals to accept compensation (WAC) on proposed prices of a hypothetical scenario. The results show that the average annual WAC to implement the environmental program was S/ 20,46 (USD 6,30) and S/ 14,84 (USD 4...

Context: Gold mining is the most destructive activity in the natural forests of the Madre de Dios region in the southeastern Peruvian Amazon. Understanding the natural regeneration process of these degraded areas is necessary to develop forest restoration projects in such conditions. Aims: We aimed to evaluate forest recovery and identify the successional and structure patterns of vegetation governing natural regeneration over time. Methods: Structure, composition, richness, diversity, and successional status were evaluated in abandoned artisanal gold mine areas in Madre de Dios, southeastern Peru. Vegetation data were recorded in 61 plots of 250 m2 established in five sites varying from 1 to 19 years of abandonment. Vegetation in abandoned areas was compared with six undisturbed forests evaluated in previous inventories. Results: In the mining lands, tree density and basal area recovere...

La presente investigación presenta como objetivo principal las características anatómicas y propiedades físicas y mecánicas de una nueva especie endémica del Perú reportada en 2005, Vochysia kosnipatae Huamantupa (Alco kaspi), procedente de plantación experimental de ocho años de San Gabán, Departamento de Puno (Perú). Se colectaron cinco trozas de 1.30 m por árbol al azar de una población de 18 árboles. Luego se obtuvieron tablones centrales de 8 cm; a partir de ellos se elaboraron las probetas en una carpintería, para posterormente evaluar las probetas en los laboratorios de anatomía de la madera UNAMAD y tecnología de la madera de UNALM. Los procedimientos se fundamentaron en metodologías de las Normas Técnicas Peruanas COPANT y IAWA. Los resultados difunden el primer reporte de la anatomía y propiedades físicas de la madera de V. kosnipatae Huamantupa (Alco kaspi...