Monthly pattern of litterfall production (mean Mg DM ha⁻¹ y⁻¹ and its standard error) in forests of: A: T. integrifolia; B: S. humboldtiana; C: A. inundata; and D: N. angustifolia, located in the P.N.P.D. (period: 1998–2002). The contribution of each fraction (leaf production, branches, and flowers+fruits) of dominant species and of the remaining species (“other”) conforming the total forest production, is indicated. Height (in m) of the river level is also given.