ENVIRONMENTAL ARBORICULTURE, TREE ECOLOGY AND VETERAN TREE MANAGEMENT

Population Ecology of the Pacific Tree Frog

We examined aspects of the population ecology of the Pacific Tree Frog (Hyla regilla) in a meadow of Corn Lily (Veratrum californicum) in the Sierra Nevada Mts. during July 2000. Using mark-recapture techniques we estimate the abundance of H. regilla to be 25±6.8 individuals which translates into a population density of 223.2±60.7 individuals per hectare. The sex ratio of the population of anim...

Evolutionary heritage influences Amazon tree ecology

Lineages tend to retain ecological characteristics of their ancestors through time. However, for some traits, selection during evolutionary history may have also played a role in determining trait values. To address the relative importance of these processes requires large-scale quantification of traits and evolutionary relationships among species. The Amazonian tree flora comprises a high dive...

Apple Tree Physiology – Implications for Orchard and Tree Management

INTERNATIONAL DWARF FRUIT TREE ASSOCIATION Apple yield and fruit quality are the end result of myriad cultural practices (e.g., pruning, thinning, spraying), environmental inputs (e.g., light, carbon dioxide, water, nutrient supply) and physiological processes (e.g., leaf area development, light interception, photosynthesis, respiration). All of them are truly essential contributors to fruit pr...

Moringa Oleifera, Miracle Tree

Estimation of Tree Biomass at Individual tree, Sample plot and Hybrid Level using Drone Images

Two-dimensional image conversion algorithms to 3D data create the hope that the structural properties of trees can be extracted through these images. In this study, the accuracy of biomass estimation in tree, plot, and hybrid levels using UAVs images was investigated. In 34.8 ha of Sisangan Forest Park, using a quadcopter, 854 images from an altitude of 100 meters above ground were acquired. SF...