The Brazilian forestry legislation, regarding the Amazon region, has improved considerably over the last years; however, more advances at the biological level need to be implemented in order to ensure management sustainability.
Knowledge of the reproductive ecology of forest species can provide support when evaluating the susceptibility of timber species to logging in order to maintain the reproductive health and genetic variability within the populations.
Considering two characteristics of floral biology: dioecy and heterostyly, it can be inferred that plants showing one of these phenomena are more susceptible to disruption in the pollination process than others, however, the forestry legislation does not consider this peculiarity.
The present study attempted to examine the pollination behavior of nine timber species in the State of Pará, Eastern Amazon, Brazil, aiming to find vulnerable points in the reproductive process in relation to logging.
The selected species were: Bertholletia excelsa (Lecythidaceae), Jacaranda copaia (Bignoniaceae), Dipteryx odorata (Leg-Papilionoideae), Manilkara amazonica (Sapotaceae), Vouacapoua americana (Leg-Caesalpinioideae), Symphonia globulifera (Clusiaceae), Parkia pendula (Leg-Mimosoideae), Cordia goeldiana (Boraginaceae) and Simarouba amara (Simaroubaceae). It was hypothesized that the flight range of the pollen flow vectors, the sexual expression, and the mating system might affect the maintenance of the reproductive health of the forest.
For forest management planning, it is extremely important to consider the available information about the dioecious and heterostylous species.