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Effects of duration of drought on the response ratio of riparian tree seedling survival (mean number of seedlings treatment/seedlings control), with different declines of water table per day (1–2 cm, 3–4 cm and 6–8 water). Weighted regression analyses are shown. n = 257 from five studies. All data points are related to the riparian tree genera Populus, Salix and Tamarix (comparable data points are shown in Fig.4).
