Abstract Whitebark pine, Pinus albicaulis Engelm., is a subalpine tree endemic to western North America. This species provides multiple ecosystem services and suffering widespread mortality from mountain pine beetle, Dendroctonus ponderosae Hopkins. Verbenone pheromone produced as D. feed, high air concentrations of verbenone deter colonizing trees. Synthetic has been formulated into products u...

The diameter distribution of savanna tree populations is a valuable indicator health because changes in the number and size trees can signal shift from to grassland or forest. Savanna distributions have traditionally been monitored with forestry techniques, where stem at breast height (DBH) measured field within defined sub-hectare plots. However, spatial scale these plots often misaligned vari...

Few studies have evaluated the application of biochar to forest ecosystems and their responses under field conditions. We manually spread grounded on floor, at rates 0 (control), 5, 10 Mg ha−1 (C0, C5 C10, respectively), an oak in central Japan test effects tree growth productivity. The relative rate diameter breast height (dbh) canopy trees (dbh > 20 cm) significantly increased C10 compared...

Questions: Is the area of influence of individual trees determined by tree size? Does competition, inferred from spatial pattern between neighbouring trees, affect adult tree spacing patterns in an tropical forest? At what size-class or stage is competition between neighbours most likely to affect adult tree spacing patterns? Location: Kibale National Park, western Uganda. Methods: Relationship...

Savannas are highly diverse and dynamic environments that can shift to forest formations due to protection policies. Long-distance dispersal may shape the genetic structure of these new closed forest formations. We analyzed eight microsatellite loci using a single-time approach to understand contemporary pollen and effective seed dispersal of the tropical tree, Copaifera langsdorffii Desf. (Fab...

On December 23-25, 1998, a major ice storm struck southeastern Virginia The storm-deposited glaze ice felled trees and limbs, causing a power outage and highway blockage. Between Februmy and April, 1999, we recorded occurrence, severity, and type of damage to trees over 2.5 cm dbh in nine mostly gently sloping plots in Matoaka Woods at the College of William and Macy. Frequency and severity of ...

Climate change has impact on agricultural production, because it raises CO2 levels in the atmosphere, which leads to higher temperatures. Agroforestry systems aid climate adaptation and mitigation by providing relatively lower temperature beneath tree canopy. Therefore, diversified are needed be identified studied throughout world that can help annual crops better survival conditions with least...

Tropical forest management has both positive and negative effects on climate change, quantifying these is important to avoid or minimize impacts reward net effects. This study contributes this effort by estimating the aboveground volume carbon present in commercial tree species a managed harvest stage Brazil’s state of Acre. A total 12,794 trees were measured. Trees categorized quantified as: “...