Does PECBMS check the quality of the national data collected, and how?
Yes, the PECBMS coordination unit thoroughly checks the national data, apart from quality control performed by coordinators of national monitoring schemes. We check the parameters that accompany each species index and that allow us to detect suspicious data, especially data with a low precision or with potential bias. If the data are inconsistent or if we suspect that their quality is low, such data are not used for the computation of supranational indices and trends and multispecies indicators. Also, at each data update, we compare the newly computed national indices and trends, as well as the supranational indices and trends and the multispecies indicators, with the previous ones and check for consistency.
See more in Methods, chapter 4. Quality control