Genetic diversity might be affected by selective logging in two ways - directly by non-random removal of specific alleles or genotypes, or indirectly as the mating system is disrupted, causing the regenerating forest to consist of non-equilibrium genotype frequencies, with a surplus of homozygotes. Both of these possible mechanisms will be investigated.

Genetic impacts may also be expected to vary by species. Several species will therefore be used as 'model' species. The final species selection will be based on field observations of species that are flowering heavily at the time of collection, and producing a high proportion of germinating seed. However, an attempt will be made to identify species that are common and widespread, common and clumped, and less common but widespread.

To quantify the genetic impact of selective logging on tropical moist forests.

• To determine whether selective logging causes a change (reduction) in genetic diversity due to disproportionate removal of specific (superior) genotypes: year 1 of project.
• To determine whether selective logging results in an increase in inbreeding, thus reducing genetic diversity: half year.
• To investigate whether the impact of selective logging can be related to species diversity or other biological attributes of the forest.