This case study examines whether selective logging might have deteriorated the genetic quality of mahogany (Swietenia macrophylla) populations. Using data from a logging area in southeastern Brazilian Amazon and genetic principles such as the breeders’ equation, the exercise allows students to explore the theme of dysgenic selection.

The groups will: discuss whether, in this logging operation, dysgenic selection would be likely to occur; identify risk factors that would suggest susceptibility to dysgenic selection, and; discuss the consequences of dysgenic selection and how it can be mitigated.

The exercise suits 1-3 groups of 4-5 students per group.