Xylem hydraulic efficiency versus vulnerability in seedlings of four contrasting Mediterranean tree species (Cedrus atlantica, Cupressus sempervirens, Pinus halepensis and Pinus nigra)
نویسندگان
چکیده
منابع مشابه
Evaluation of Nonlinear Height-Diameter Models of Two Important Species of Turkish Pine (Pinus brutia) and Mediterranean Cypress (Cupressus sempervirens var. horizontalis), in the Planted Forests
Knowledge about the relationship between tree height (H) and diameter at breast height (D) is crucial for forest planning, monitoring, biomass estimation, and forest stands dynamics description. In this study, 20 different height-diameter models were evaluated to estimate accurately the height of the trees of Pinus brutia and Cupressus sempervirens var. horizontalis species in Arabdagh region (...
متن کاملAggregated Cones in Pinus Halepensis
Aggregated female cones were found in 192 Pinus halepensis trees growing in 54 populations in Israel, in habitats of vastly differing ecological conditions. All of these trees also carried normal (1-5 in a whorl) female cones. The number of aggregates per tree varied from one to several dozen. Some of the trees formed aggregates every year, after the first year of aggregate formation, while oth...
متن کاملIndirect Evidence for Genetic Differentiation in Vulnerability to Embolism in Pinus halepensis
Climate change is increasing mean temperatures and in the eastern Mediterranean is expected to decrease annual precipitation. The resulting increase in aridity may be too rapid for adaptation of tree species unless their gene pool already possesses variation in drought resistance. Vulnerability to embolism, estimated by the pressure inducing 50% loss of xylem hydraulic conductivity (P 50), is s...
متن کاملRelationships between tree size, crown shape, gender segregation and sex allocation in Pinus halepensis, a Mediterranean pine tree.
BACKGROUND AND AIMS Sex allocation has been studied mainly in small herbaceous plants but much less in monoecious wind-pollinated trees. The aim of this study was to explore changes in gender segregation and sex allocation by Pinus halepensis, a Mediterranean lowland pine tree, within tree crowns and between trees differing in their size or crown shape. METHODS The production of new male and ...
متن کاملVulnerability to cavitation, hydraulic efficiency, growth and survival in an insular pine (Pinus canariensis).
BACKGROUND AND AIMS It is widely accepted that hydraulic failure due to xylem embolism is a key factor contributing to drought-induced mortality in trees. In the present study, an attempt is made to disentangle phenotypic plasticity from genetic variation in hydraulic traits across the entire distribution area of a tree species to detect adaptation to local environments. METHODS A series of t...
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ژورنال
عنوان ژورنال: Annals of Forest Science
سال: 2002
ISSN: 1286-4560,1297-966X
DOI: 10.1051/forest:2002015