Two sides of one medal: Arable weed vegetation of Europe in phytosociological data compared to agronomical weed surveys

Questions Two scientific disciplines, vegetation science and weed science, study arable vegetation, which has seen a strong diversity decrease in Europe over the last decades. We compared two collections of plot-based records originating from these disciplines. The aim was to check suitability for joint analysis addressing research questions opposing domains. asked: are complementary? If so, how can they be used analysis? Location Europe. Methods 13 311 phytosociological relevés 328 concerning both data collection properties recorded species richness. To deal with bias data, we also analysed different subsets (i.e., crops, geographical regions, organic vs conventional fields, center edge plots). Results Records have an average number 19.0 ± 10.4. Metadata on survey methodology or agronomic practices rare this collection. 8.5 6.4. They accompanied by extensive methodological information. Vegetation taken at field edges fields similar numbers. cover parts but results consistent six overall set. difference numbers may caused differences between i.e., plot positioning within sizes, timing. Conclusion This comparison that were originally sampled purpose represents new effort connecting scientists scientists. Both show aspects means use is valuable as it contribute more complete picture European landscapes.