منابع مشابه
Vulnerability 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...
متن کاملPopulation divergence for heteroblasty in the Canary Island pine (Pinus canariensis, Pinaceae).
A heteroblastic (or vegetative phase) change is an abrupt manifestation in the general heteroblastic development during the ontogeny of plants. The Canary Island pine undergoes an especially marked and delayed heteroblastic change, including both the formation of secondary needles on dwarf shoots and the onset of preformed growth. To assess genetic and environmental effects on the heteroblastic...
متن کاملPrescribed Burning and Clear-Cutting Effects on Understory Vegetation in a Pinus canariensis Stand (Gran Canaria)
Prescribed fires are a powerful tool for reducing fire hazards by decreasing amounts of fuel. The main objective is to analyze the effects of prescribed burning on the understory vegetation composition as well as on the soil characteristics of a reforested stand of Pinus canariensis. The study attempts to identify the effects of the preburning treatment of cutting understory vegetation on the f...
متن کاملThe Effect of Altitude on the Pattern of Gene Flow in the Endemic Canary Island Pine, Pinus canariensis
Pinus canariensis is endemic to the western Canary Islands (NW coast of Africa), where it forms forest spanning an altitude from 500 to 2500 m. There are dramatic changes in environmental conditions (temperature, moisture and solar radiation) over short distances due to this elevation gradient in the Canary Island pine forest. Those differences in environmental conditions may lead to asynchrono...
متن کاملNatural recovery of genetic diversity by gene flow in reforested areas of the endemic Canary Island pine, Pinus canariensis
15 The endemic pine, Pinus canariensis, forms one of the main forest ecosystems in the 16 Canary Islands. In this archipelago, pine forest is a mosaic of natural stands (remnants 17 of past forest overexploitation) and artificial stands planted from the 1940’s. The 18 genetic makeup of the artificially regenerated forest is of some concern. The use of 19 reproductive material with uncontrolled ...
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ژورنال
عنوان ژورنال: Bulletin of Miscellaneous Information (Royal Gardens, Kew)
سال: 1918
ISSN: 0366-4457
DOI: 10.2307/4118289