Forest structure influence biodiversity in various ways, as tree species diversity, stand age and wood debris distinct habitats and resources for different species. However, the response of biodiversity to diverse forest structures is not always predictable, with some species showing strong reactions and othes exhibiting weak or negative responses. This invonsistency in species observations is primarily due to the highly variable conditions of each case study, highlighting the intricate relationship between biodiversity and forest structure, while making generalization challenging. A baseline understanding of the main patterns expected under specific environmentatl conditions is required to evaluate monitor, or manage forests effectively. For this purpose, the second chapter compiles existing literature on biodiversity's response to forest structure, extracting correlation values between the two and calculating the effect size for each study. We then compare the effect size of this response across different taxa and predicts the xpected effect size of the forest structure's influence on biodiversity.
