Wetlands are the largest natural source of methane globally. However, large-scale methane estimates and predictions are unconstrained due in part to simplified representations in biogeochemical models of complex interactions between biological components and their biophysical drivers. The purpose of this session is to bring together field experimentalists studying microorganisms and vegetation in the wetlands' methane cycle and modelers seeking the inclusion of biological components in current biogeochemical models. We invite contributions focusing on biological components' roles in the production, consumption, and transport processes of methane and how biophysical drivers such as hydrology or temperature modulate those processes. We welcome studies on different ecological organization levels, from genes to communities, with a particular interest in those with a potential to advancing methane biogeochemical and transport model structure and parameterization.