Bur oak - An uncommon native tree in Saskatchewan
نویسندگان
چکیده
منابع مشابه
Tree and stand transpiration in a Midwestern bur oak savanna after elm encroachment and restoration thinning
Oak savannas, once common in the Midwest, are now isolated remnants within agricultural landscapes. Savanna remnants are frequently encroached by invasive trees to become woodlands. Thinning and prescribed burning can restore savanna structure, but the ecohydrological effects of managing these remnants are poorly understood. In this study, we measured sap flow (Js) to quantify transpiration in ...
متن کاملSoil and Tree Ring Chemistry Changes in an Oak Forest
Changes in soil chemistry due to historic large-scale disturbances, e.g. pollution inputs, storm damage, and logging, have previously been shown to cause similar changes in the nutrient concentrations found in tree rings. Repeated soil sampling in a reference watershed at the Coweeta Hydrologic Laboratory (Otto, NC) in 1970, 1990, and 2004 showed significant decreases in cation concentrations a...
متن کاملLight response of hydraulic conductance in bur oak (Quercus macrocarpa) leaves.
A four- to seven-fold enhancement of leaf hydraulic conductance by light has been reported in three temperate tree species. The enhancement occurs in the liquid-flow pathway between the petiole and the site of water evaporation. The enhancement occurs within 1 h, and dissipates in darkness over a period of 1 to 10 h depending on species. Here we report light-induced enhancement of leaf hydrauli...
متن کاملNon-oak native plants are main hosts for sudden oak death pathogen in California
The finding of Phytophthora ramorum — the pathogen that causes sudden oak death in four California native trees — on rhododendron in Europe led us to hypothesize that its host range in California’s natural forests was much greater than previously suspected. In addition to the affected oak species, we have now identified an additional 13 species from 10 plant families that act as hosts for P. ra...
متن کاملBur oak blight, a new disease on Quercus macrocarpa caused by Tubakia iowensis sp. nov.
A newly recognized, late-season leaf disease of Quercus macrocarpa (bur oak) has become increasingly severe across Iowa and in neighboring states since the 1990s. Vein necrosis and leaf death may occur over the whole crown or only on the lower branches. Symptoms typically intensify year-to-year in individual trees, and there appears to be substantial variation in susceptibility. Distinctive con...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 2002
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay5683