نتایج جستجو برای: radial growth trees
تعداد نتایج: 957374 فیلتر نتایج به سال:
Altitude-related climatic factors, especially temperature, are important factors that affect tree growth in mountain forest ecosystems. The aims of this study were to estimate the intra-annual radial growth differences of Larix principis-rupprechtii (L. principis-rupprechtii) between its upper and lower distribution limits, at 2740 and 2040 m a.s.l, respectively. Dynamics of xylem growth were o...
Intensive livestock management impacts forest and trees in different ways. Pig manure is a major source of nitrogen (N) pollution surface ground waters some European regions such as north-eastern Spain, but it understudied how application agroforestry systems. How pig affects tree radial growth the N cycle was assessed by measuring concentrations soil, leaves wood δ15N tree-ring two species wid...
The increased frequency and severity of drought events due to climate warming is negatively affecting tree radial growth, particularly in drought-prone regions, such as, e.g., the Mediterranean. In this change hotspot, populations same species may show different growth responses climate, great variety microclimates environments that characterise biogeographic region. study, we analysed growth-c...
Juniperus thurifera L. is an endemic conifer of the western Mediterranean Basin where it is subjected to a severe climatic stress characterized by low winter temperatures and summer drought. Given the trend of increased warming-induced drought stress in this area and the climatic sensitivity of this species, we expect a negative impact of climate change on growth and ecophysiological performanc...
Stored non-structural carbohydrates (NSCs) could play an important role in tree survival in the face of a changing climate and associated stress-related mortality. We explored the effects of the stomata-blocking and defoliating fungal disease called Swiss needle cast on Douglas-fir carbohydrate reserves and growth to evaluate the extent to which NSCs can be mobilized under natural conditions of...
It is important to explore the responses of radial tree growth in different regions understand patterns and enhance forest management protection with climate change. We constructed ring width chronologies Picea crassifolia from Qilian Mountains northwest China. used Pearson correlation moving analyze main factors limiting trees temporal stability growth–climate relationship, while spatial resul...
In seasonally dry forests, wildfires can reduce competition for soil water among trees and improve forest resilience to drought. We tested this idea by comparing tree-ring growth patterns of Pinus pinea stands subjected two prescribed burning intensities (H, high; L, low) compared them with unburned (U) control in southwestern Spain. Then, we assessed post-growth droughts that occurred before (...
Thinning utilizing cut-to-length and whole-tree harvesting systems with subsequent underburning were assessed for their influence on stand productivity and mensurational variables in uneven-aged Jeffrey pine (Pinus jeffreyi Grev. & Balf.) on the Tahoe National Forest. Both intermediate and a combination of dominant and codominant crown class trees were selected within each treatment to evaluate...
The radial increases in wood specific gravity known in many tree species have been interpreted as providing mechanical support in response to the stresses associated with wind loading. This interpretation leads to the hypothesis that individuals reaching the canopy should (1) be more likely to have radial increases in specific gravity and (2) exhibit greater increases than individuals in the su...
Stable carbon isotope (δ(13)C) series were developed from analysis of sequential radial wood increments from AD 1850 to AD 2009 for four mature primary rainforest trees from the Danum and Imbak areas of Sabah, Malaysia. The aseasonal equatorial climate meant that conventional dendrochronology was not possible as the tree species investigated do not exhibit clear annual rings or dateable growth ...
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