Root niche separation can explain avoidance of seasonal drought stress and vulnerability of overstory trees to extended drought in a mature Amazonian forest - Ivanov, Valeriy Y; Hutyra, Lucy R; Wofsy, Steven C; Munger, James William; Saleska, Scott R; Oliveira Junior, Raimundo Cosme de; Camargo, Plinio Barbosa de (Water Resources Research, 2012)