This effect of rainfall exclusion on the more integrative δ 13 C-derived iWUE was, however, less evident in instantaneous gas exchange measurements, which only showed marginally significant differences between treatments in A and g s .
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Xylem and Leaf Functional Adjustments to Drought in <i>Pinus sylvestris</i> and <i>Quercus pyrenaica</i> at Their Elevational Boundary.
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