Figure 6: Leaf thermal tolerance for six dominant evergreen tree species during the end of the dry season from the hottest Amazonian forest site, Nova Xavantina measured with Fv /Fm temperature response to 15-minute duration heat treatment. Inset histogram shows warming trends in daily maximum air temperature for the site for the dry period of July-October (primary ordinate). Four-point logistic curves indicate combined fit for all the species measured (secondary ordinate). Box plots are overall measures of thermal tolerance with temperature on the abscissa. Box plot ordinate positioning indicative and not absolute. [See Supporting Information Figure S2 for wet season status]