Fig. 1From: Analysing the quality of Swiss National Forest Inventory measurements of woody species richnessSchematic representation of the components of species richness assessment and pseudo-turnover (PT) situations, adapted from Baselga (2012). Each number represents a different species. a: number of species reported in both surveys; b: number of species reported only in the regular survey; c: number of species reported only in the repeat survey; a + b: richness of regular survey; a + c: richness of repeat surveyBack to article page