منابع مشابه
Concentration of Heavy Metals in Bark Samples of Pine Trees in Neishabur, Iran
Background and purpose: Heavy metals in urban air are major health threats and increase the risk of respiratory, cardiovascular, and cancers in humans. An efficient and low-cost method for monitoring these pollutants is using tree bark as a bioindicator. The purpose of this study was to measure the concentration of heavy metals by pine tree bark as a bioindicator in Neishabur, north-east of Ira...
متن کاملconcentration in young loblolly pine trees
We measured diel patterns of stem surface CO 2 efflux ( E s , m mol m 2 s 1 ), sap velocity ( v s , mm s 1 ) and xylem CO 2 concetration ([CO 2 ]) ( X s , %) in 8-year-old loblolly pine trees during the spring to determine how v s and X s influence E s . All trees showed a strong diel hysteresis between E s and stem temperature, where at a given temperature, E s was lower during the day than at...
متن کاملDetection of the Pine Trees Damaged by Pine Wilt Disease Using High Spatial Remote Sensing Data
Since 1988 pine wilt disease has spread over rapidly in Korea. It is not easy to detect the damaged pine trees by pine wilt disease from conventional remote sensing skills. Thus, many possibilities were investigated to detect the damaged pines using various kinds of remote sensing data including high spatial resolution satellite image of 2000/2003 IKONOS and 2005 QuickBird, aerial photos, and d...
متن کاملDrivers of genotype by environment interaction in radiata pine as indicated by multivariate regression trees
Productivity of forest tree plantations can be maximized by matching genetically adapted planting stock to environments where they perform best. We used multivariate regression tree (MRT) analysis with environmental predictors to quantify and characterize the nature of genotype by environment interactions (G E) of radiata pine diameter at breast height (DBH) grown in New Zealand. The analysis w...
متن کاملPositive adjacency effects mediated by seed disperser birds in pine plantations.
This study examines the consequences of adjacent elements for a given patch, through their effects on zoochorous dispersion by frugivorous birds. The case study consists of pine plantations (the focal patch) adjacent to other patches of native vegetation (mixed patches of native forest and shrublands), and/or pine plantations. Our hypothesis is that input of native woody species propagules gene...
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ژورنال
عنوان ژورنال: Science
سال: 1884
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.ns-3.58.305