Stem sapwood hydraulic permeability, tree leaf area, sapwood basal area, earlywood to latewood ratio of annual rings, radial variation in hydraulic permeability and stem hydraulic capacity were examined in dominant (D), codominant (CD) and suppressed (SP) lodgepole pine (Pinus contorta Dougl. ex Loud.) trees growing on medium and poor sites. Hydraulic permeability on a sapwood area basis (ks) w...

Increasing N deposition caused by intensive anthropogenic activities is expected to affect forest growth. However, the effects of N deposition on trees are still controversial due to the wide variability in results and experimental methods used. We conducted an experiment involving both canopy and understory N addition to investigate the effects of N-addition on intra-annual xylem formation of ...

Abstract Sex has a significant effect on various traits among dioecious plants. In this analysis of the sex radial growth and wood density numerous 20-year-old trees Populus deltoides growing in common garden, male performed better than females growth, but did not significantly affect density. Growth rate were weakly negatively correlated. selection is also critical for controlling seed-hair po...

Changing climate can strongly affect tree growth and forest productivity. The dendrochronological approach to assessing the impact of change on is possible through climate–growth correlation analysis. This study uses an individual tree-based model Pinus wallichiana (P. wallichiana) radial response across physiographic gradients in lower distributional range Nepal. sampled six sites Makwanpur di...

The impact of volcanic eruptions on forest ecosystems can be investigated using dendrochronological records. While long-range effects are usually mediated by decreased air temperatures, resulting in frost rings or reduced maximum latewood density, local effects include abrupt suppression of radial growth, occasionally followed by greater than normal growth rates. Annual rings in Mexican mountai...

Intra-annual radial growth rates and durations in trees are reported to differ greatly in relation to species, site and environmental conditions. However, very similar dynamics of cambial activity and wood formation are observed in temperate and boreal zones. Here, we compared weekly xylem cell production and variation in stem circumference in the main northern hemisphere conifer species (gener...

Increased atmospheric CO2 may affect the physiological response of natural trees to drought. We examined radial growth rates developed from five western juniper chronologies to determine if post-drought growth responses have changed. Using prior year October to current year June precipitation from 1896-1998, we identified drought recovery years as having standardized scores (z-scores) > 0 and p...

• Oak growing period decreases by 70 days along an elevational gradient of 1500 m. Growing extends in warmer years within population at a given elevation. Phenological ranks between individuals remain mostly stable over years. Radial growth benefits from temperatures only higher elevations. There is no link radial and length population. Tree leaf phenology are both affected global warming. Moun...

Where competition suppresses tree growth, mortality of adjacent trees can release the surviving individuals, leading to a growth increase. However, primary forests are complicated systems, where interact in both competitive and facilitative ways mediated by their size, species, broad ecological context which they grow. Thus, magnitude even direction responses nearby may vary, has implications f...