Information Senuane doi: 10.3897/biss.5.75265 Conference Abstract B S S Biodiversity Biodiversity Information Science and Standards 5: e75265 Experiences from the Danish Fungal Atlas: Linking mushrooming, nature conservation and primary biodiversity research Jacob Heilmann-Clausent, Tobias G Frgslev8, Jens H Petersen!, Thomas Leessget, Thomas S Jeppesen! + Center for Macroecology, Evolution and Climate, GLOBE instititute, University of Copenhagen, Copenhagen, Denmark § Section for Geogenetics, GLOBE institute, University of Copenhagen, Copenhagen, Denmark | Mycokey, Tirstrup, Denmark 4 Global Biodiversity Information Facility, Copenhagen, Denmark Corresponding author: Jacob Heilmann-Clausen (jheilmann-clausen@sund.ku.dk) Received: 14 Sep 2021 | Published: 16 Sep 2021 Citation: Heilmann-Clausen J, Fraslev TG, Petersen JH, Leess@e T, Jeppesen TS (2021) Experiences from the Danish Fungal Atlas: Linking mushrooming, nature conservation and primary biodiversity research . Biodiversity Information Science and Standards 5: e75265. https://doi.org/10.3897/biss.5.75265 Abstract The Danish Fungal Atlas is a citizen science project launched in 2009 in collaboration among the University of Copenhagen, Mycokey and the Danish Mycological Society. The associated database now holds almost 1 million fungal records, contributed by more than 3000 recorders. The records represent more than 8000 fungal species, of which several hundred have been recorded as new to Denmark during the project. In addition several species have been described as new to science. Data are syncronized with the Global Biodiversity Information Facility (GBIF) on a weekly basis, and is hence freely available for research and nature conservation. Data have been used for systematic conservation planning in Denmark, and several research papers have used data to explore subjects such as host selection in wood-inhabiting fungi (Heilmann-Clausen et al. 2016), recording bias in citizen science (Geldmann et al. 2016), fungal traits (Krah et al. 2019), biodiversity patterns (e.g. Andrew et al. 2018), and species discovery (Heilmann-Clausen et al. 2019). The project database is designed to faciliate direct interactions and communication among volunteers. The validation of submitted records is interactive and combines species- specific smart filters, user credibility, and expert tools to secure the highest possible data © Heilmann-Clausen J et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. 2 Heilmann-Clausen J et al credibility. In 2019, an Al (artificial intelligence) trained species identification tool was launched along with a new mobile app, enabling users to identify and record species directly in the field (Sulc et al. 2020). At the same time, DNA sequencing was tested as an option to test difficult identifications, and in 2021 a high-throughput sequencing facility was developed to allow DNA sequencing of hundreds of fungal collections at a low cost. The presentation will give details on data validation, data use and how we have worked with cultivation of volunteers to provide a truly coherent model for collaboration on mushroom citizen science. Keywords Citizen science, DNA sequencing, fungi, species identification, validation of species data Presenting author Jacob Heilmann-Clausen Presented at TDWG 2021 Acknowledgements We thank all volunteers contributing fungal records to the Danish Fungal Atlas. Hosting institution Center for Macroecology, Evolution and Climate (CMEC), GLOBE institute, University of Copenhagen References ° Andrew C, Halvorsen R, Heegaard E, Kuyper T, Heilmann-Clausen J, Krisai-Greilhuber |, Bassler C, Egli S, Gange A, Hg@iland K, Kirk P, Senn-Irlet B, Boddy L, Buntgen U, Kauserud H (2018) Continental-scale macrofungal assemblage patterns correlate with climate, soil carbon and nitrogen deposition. Journal of Biogeography 45 (8): 1942-1953. https://doi.org/10.1111/jbi.13374 ° Geldmann J, Heilmann-Clausen J, Holm T, Levinsky |, Markussen B, Olsen K, Rahbek C, Tettrup A (2016) What determines spatial bias in citizen science? Exploring four recording schemes with different proficiency requirements. Diversity and Distributions 22 (11): 1139-1149. https://doi.org/10.1111/ddi.12477 Experiences from the Danish Fungal Atlas: Linking mushrooming, nature C ... 3 Heilmann-Clausen J, Bruun HH, Ejrnaes R, Fr@slev TG, Leessg@e T, Petersen J (2019) How citizen science boosted primary knowledge on fungal biodiversity in Denmark. Biological Conservation 237: 366-372. https://doi.org/10.1016/j.biocon.2019.07.008 Heilmann-Clausen J, Maruyama P, Bruun HH, Dimitrov D, Leessge T, Fre@slev TG, Dalsgaard B (2016) Citizen science data reveal ecological, historical and evolutionary factors shaping interactions between woody hosts and wood-inhabiting fungi. New Phytologist 212 (4): 1072-1082. https://doi.org/10.1111/nph.14194 Krah F, Buntgen U, Schaefer H, Muller J, Andrew C, Boddy L, Diez J, Egli S, Freckleton R, Gange A, Halvorsen R, Heegaard E, Heideroth A, Heib!l C, Heilmann-Clausen J, Hgiland K, Kar R, Kauserud H, Kirk P, Kuyper T, Krisai-Greilhuber |, Norden J, Papastefanou P, Senn-irlet B, Bassler C (2019) European mushroom assemblages are darker in cold climates. Nature Communications 10 (1). httos://doi.org/10.1038/ $41467-019-10767-z Sulc M, Picek L, Matas J, Jeppesen T, Heilmann-Clausen J (2020) Fungi Recognition: A Practical Use Case. 2020 IEEE Winter Conference on Applications of Computer Vision (WACV) https://doi.org/10.1109/wacv45572.2020.9093624