... noteEcophysiological factors contributing to the distributions of several Quercus species in the intermountain westJR Ehleringer,SL PhillipsDepartment of Biology, University of Utah, ... examineaspects of the water relations of these threeoak species native to the intermountain westand of their hybrids under common growthenvironments in order to evaluate ... precipitation inputs since the late spring. In contrast, the native species, Qgambelii, and the Q gambelii hybrids werealbe to maintain higher rates of gasexchange during this...