Greater observer expertise leads to higher estimates of bryophyte species richness

This dataset contains bryophyte species count data and information about the observers bryophyte expertise for 2332 relevés conducted from 2011 to 2021 on 10-m2 plots in a long-term monitoring program in Switzerland. Plots were situated in raised bogs and fens of national importance, which were distributed across the whole country. The majority of the plots is represented by two relevés as sites are revisited every six years. **The dataset was prepared for usage in an unpublished article with the title of this dataset. Due to improvements in the analysis, results turned out to be more nuanced and it was found that the title of the data set is no longer valid.** A new dataset was created and is available here: [https://www.doi.org/10.16904/envidat.683](https://www.doi.org/10.16904/envidat.683)