منابع مشابه
Atmospheric and soil drought reduce nocturnal conductance in live oaks.
Nocturnal and daytime whole-canopy transpiration rate (E) and conductance (g = E/VPD, where VPD is leaf to air vapor pressure difference) were assessed gravimetrically in drought-treated and well-watered 3-year-old saplings of live oak species (Quercus series Virentes Nixon) from the southeastern USA (Quercus virginiana Mill.) and Central America (Q. oleoides Cham. and Schlecter). Our objective...
متن کاملWater-use strategies in two co-occurring Mediterranean evergreen oaks: surviving the summer drought.
In the Mediterranean evergreen oak woodlands of southern Portugal, the main tree species are Quercus ilex ssp. rotundifolia Lam. (holm oak) and Quercus suber L. (cork oak). We studied a savannah-type woodland where these species coexist, with the aim of better understanding the mechanisms of tree adaptation to seasonal drought. In both species, seasonal variations in transpiration and predawn l...
متن کاملSeasonal photosynthetic responses of European oaks to drought and elevated daytime temperature.
Oaks are commonly considered as drought- and heat-tolerant trees that might benefit from a warmer and drier climate. Their tolerance to drought has been frequently studied in the past, whereas studies dealing with elevated temperature or its combination with drought are very limited in number. In this study we investigated seasonal photosynthetic patterns in three European oak species (Quercus ...
متن کاملThe Response of Native Oaks From California and Israel to Drought
California and Israel are both characterized by Mediterranean climates, and the native oaks growing in these two locales occupy similar ecological niches. However, in California certain oak species are having difficulty regenerating adequately, while in Israel this is not a problem. From 2004 to 2006, a series of greenhouse studies were conducted in both Israel and California to sort out the ro...
متن کاملAncient Blue Oaks Reveal Human Impact on San Francisco Bay Salinity
San Francisco Bay is one of the most important estuaries on the west coast of the Americas. Its water quality is controlled primarily by strearnflow from the Sacramento and San Joaquin rivers. In fact, freshwater inflow from the Sacramento-San Joaquin Delta explains 86% of the salinity variability at the mouth of the San Francisco Bay estuary [klerson et al., 19891. The massive diversion of str...
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ژورنال
عنوان ژورنال: California Agriculture
سال: 1990
ISSN: 0008-0845
DOI: 10.3733/ca.v044n02p15