Results: 303

Especies de flebotomíneos (Diptera: Psychodidae) recolectados en reservas naturales de las regiones del Darién y del Pacífico en Colombia

Biomédica (Bogotá); 37 (supl.2), 2017
Resumen Introducción. Los departamentos de Chocó y Antioquia en Colombia presentan condiciones climáticas y de vegetación que favorecen el establecimiento de especies de vectores del género Lutzomyia y la transmisión de Leishmania spp. a poblaciones humanas que ingresan a ambientes selváticos co...

Medicinal plants in the family farms of rural areas in southern Brazil: ecological and ethnobotanical aspects

The objective of this study was to find which medicinal plants were used by family farmers from rural areas located in the state of Santa Catarina, southern Brazil, and to characterize the habitat where they are cultivated. This research was conducted in 2011/2012, it included 43 farmers aged from 38 to ...

Nutrition facts and limits for micronutrients in tree species used in urban forestry

An. acad. bras. ciênc; 89 (3), 2017
ABSTRACT There is a huge lack of researches that evaluate the nutritional limits in tree species used in urban forestry, especially in terms of micronutrients. This study aimed to establish limits and range of micronutrients levels for the proper development of tree species utilized in urban forestry. Th...

Predicting of biomass in Brazilian tropical dry forest: a statistical evaluation of generic equations

An. acad. bras. ciênc; 89 (3), 2017
ABSTRACT Dry tropical forests are a key component in the global carbon cycle and their biomass estimates depend almost exclusively of fitted equations for multi-species or individual species data. Therefore, a systematic evaluation of statistical models through validation of estimates of aboveground biom...

Carbon and nutrient stocks of three Fabaceae trees used for forest restoration and subjected to fertilization in Amazonia

An. acad. bras. ciênc; 89 (3), 2017
ABSTRACT Amazonia is crucial to global carbon cycle. Deforestation continues to be one of the main causes of the release of C into the atmosphere, but forest restoration plantations can reverse this scenario. However, there is still diffuse information about the C and nutrient stocks in the vegetation bi...

Modeling and mapping basal area of Pinus taeda L. plantation using airborne LiDAR data

An. acad. bras. ciênc; 89 (3), 2017
ABSTRACT Basal area (BA) is a good predictor of timber stand volume and forest growth. This study developed predictive models using field and airborne LiDAR (Light Detection and Ranging) data for estimation of basal area in Pinus taeda plantation in south Brazil. In the field, BA was collected from conve...

Mammographic density among indigenous women in forested areas in the state of Amapá, Brazil: a cross-sectional study

Säo Paulo med. j; 135 (4), 2017
ABSTRACT CONTEXT AND OBJECTIVE: There is no register of breast cancer cases among indigenous populations in Brazil. The objective here was to evaluate the association of clinical and demographic characteristics with mammographic density among indigenous women. DESIGN AND SETTING: Cross-sectional analyt...

Soil-vegetation relationships and community structure in a "terra-firme"-white-sand vegetation gradient in Viruá National Park, northern Amazon, Brazil

An. acad. bras. ciênc; 89 (2), 2017
ABSTRACT Viruá National Park encompasses a vast and complex system of hydromorphic sandy soils covered largely by the white sand vegetation ("Campinarana") ecosystem. The purpose of this study was to investigate a vegetation gradient of "terra-firme"-white sand vegetation at the Viruá National Park. Ni...

Diameter distribution in a Brazilian tropical dry forest domain: predictions for the stand and species

An. acad. bras. ciênc; 89 (2), 2017
ABSTRACT Currently, there is a lack of studies on the correct utilization of continuous distributions for dry tropical forests. Therefore, this work aims to investigate the diameter structure of a brazilian tropical dry forest and to select suitable continuous distributions by means of statistic tools fo...

Insect Galls of the Parque Nacional do Itatiaia (Southeast Region, Brazil)

An. acad. bras. ciênc; 89 (1,supl), 2017
ABSTRACT The Parque Nacional do Itatiaia (PNI) (Brazilian Southeast Region) was surveyed monthly for insect galls from February/2014 to December/ 2015. A total of 432 gall morphotypes were found. This number places the PNI as the richest Atlantic forest area in number of gall morphotypes. The galls were ...