Successional Patterns of Mortality and Growth of Large Trees in a Panamanian Lowland Forest

1 All trees $\geq$ 19.1 d.b.h. recorded subregional patterns in forest composition. 4 Moss polsters may be especially subject to annual or seasonal variations in pollen production and dispersal. Therefore, application of pollen source areas and pollen-vegetation calibration parameters estimated from moss-polster studies to interpretation of fossil-pollen sequences from closed-canopy sediments (humus, small hollows) is uncertain. 5 Studies of modern pollen assemblages in which pollen deposition in integrated over several years are needed in patchy forests to assess pollen source area of closed-canopy basins and to determine the effects of vegetation patterns on pollen representation.