A theoretical and experimental verification of a simple hypothesis was carried out in this study to determine if features the anatomical structure coniferous annual rings (in case pine trees from moisture-deficient growth conditions steppe zone) quantified tracheidograms can be used reconstruct kinetics seasonal growth. During two sharply different seasons, sampling performed periodically, tree...

Abstract Recent climate warming is expected to increase tree growth and productivity, substantially altering ecological function boundaries in northern ecosystems. Although largely determines the range of trees any biome, variations microsite conditions can influence on a finer scale. Red foxes ( Vulpes vulpes ) are found most terrestrial ecosystems considered ecosystem engineers through their ...

Abstract The ability of forests to provide ecosystem services and renewable goods faces several challenges related insect defoliation. Spruce budworm outbreaks represent one the major natural disturbances in boreal forest eastern North America. In this chapter, we will focus on effects defoliation by spruce balsam fir black trees. We first describe tree water status depending duration then pres...

In order to evaluate the improvement of rubber productivity trees by late upward tapping. A study was conducted at SCASO (Société Civile Agricole du Sud-Ouest) on PB 260 clone active metabolic class. The experimental set-up is a Fisher block design with eight treatments and three replications. compared were bled in reverse eleventh year harvest, quarter spiral every 3, 4, 5 6 days, stimulation ...

The northern treeline is generally limited by available warmth. However, in recent years, more and more studies have identified drought stress as an additional limiting factor for tree growth in northern boreal forests and at treelines. Three growth responses to warming have been identified: increase in growth, decrease in growth, and nonsignificant correlation of tree growth with climate. Here...

Tree-ring chronologies have been widely used in studies of tree mortality where variables of recent growth act as an indicator of tree physiological vigour. Comparing recent radial growth of live and dead trees thus allows estimating probabilities of tree mortality. Sampling of mature dead trees usually provides death-year distributions that may span over years or decades. Recent growth of dead...

introduction climate change happens due to abnormal changes of climate within the earth’s atmosphere and their consequences. one of the most significant effects of climate change is the irreversible damage to some floral species and forest ecosystems. tree species reflect the impact of climate changes on their ring width. generally, tree rings vary in size each year depending upon the environme...