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Fruit-fall provides the transfer of biomass and nutrients between forest strata and remains a poorly understood component of Amazon forest systems. Here we detail fruit-fall patterns including those of  Vouacapoua americana  a Critically Endangered timber species across 25 km 2  of lowland Amazon forest in 2016. We use multi-model comparisons and an ensemble model to explain and interpolate fruit-fall data collected in 90 plots (totaling 4.42 ha). By comparing patterns in relation to observed and remotely sensed biomass estimates we establish the seasonal contribution of  V. americana  fruit-fall biomass. Overall fruit-fall biomass was 44.84 kg ha −1  month −1  from an average of 44.55 species per hectare, with  V. americana  dominating both the number and biomass of fallen fruits (43% and 64%, number and biomass respectively). Spatially explicit interpolations provided an estimate of 114 Mg dry biomass of  V. americana  fruit-fall across the 25 km 2  area. This quantity represents the rapid transfer by a single species of between 0.01 and 0.02% of the overall above ground standing biomass in the area. These findings support calls for a more detailed understanding of the contribution of individual species to carbon and nutrient flows in tropical forest systems needed to evaluate the impacts of population declines predicted from short (< 65 year) logging cycles.

Contribution of Vouacapoua americana fruit-fall to the release of biomass in a lowland Amazon forest