Roger Grau-Andrés (roger.grau.andres@slu.se or rogergrau@yahoo.es) David A. Wardle Marie-Charlotte Nilsson Hegethorn Paul Kardol October 2020 This file explains the variables in the file "BryoC_field_thickness_moss_humus_201020.csv", which includes data related to thickness of the moss and humus layers in the mesocosms. The data is described in the paper "Precipitation regime controls bryosphere carbon cycling similarly across contrasting ecosystems", published in the journal Oikos. Please refer to the paper for further details. meso_id: ID of the mesocosm. field_moss_cm: thickness of the moss layer, in centimeters, measured in the field before the experiment started. field_humus_cm: thickness of the humus layer, in centimeters, measured in the field before the experiment started.