Quantifying the biodiversity value of repeatedly logged rainforests: gradient and comparative approaches from Borneo

There is substantial variation in the reported effects of logging on tropical forest fauna. In addition to inherent variation in disturbance sensitivity amongst taxa, another contributing factor is that most studies use comparative analyses of unlogged versus logged forests, which cannot fully account for heterogeneity in disturbance as well as underlying environmental gradients. To better understand how logging affects biodiversity we examined changes in bat assemblages across a disturbance gradient ranging from old growth to forest logged several times. In one of the first evaluations of repeatedly logged forest, we use both comparative and gradient analyses to reveal substantial signals in assemblage change in response to habitat alteration.

Whilst highlighting the ecological importance of unlogged stands, we show that heavily degraded forests – even those that have been repeatedly logged – still hold some potential value for tropical biota, and could have a role in conservation.