1 Research Institute on Terrestrial Ecosystems of the National Research Council (IRET-CNR), Florence, Italy.
2 "Emil Racoviţă" Institute of Speleology, Department of Cluj-Napoca, Cluj-Napoca, Romania.
3 Centre for Ecology, Evolution, and Environmental Changes, Global Change and Sustainability Institute, University of Lisbon, Lisbon, Portugal.
4 National Biodiversity Future Center, Palermo, Italy.
5 Department of Life, Health, and Environmental Sciences, University of L'Aquila, L'Aquila, Italy.
6 Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland.
7 Department of Aquatic Ecology, Eawag: Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland.
8 University of the Azores, Centre for Ecology, Evolution, and Environmental Changes/Azorean Biodiversity Group, Global Change and Sustainability Institute, School of Agricultural and Environmental Sciences, Angra do Heroísmo, Azores, Portugal.
9 Water Research Institute of the National Research Council (IRSA-CNR), Verbania, Italy.
10 Finnish Museum of Natural History (LUOMUS), University of Helsinki, Helsinki, Finland.
11 Department of Organisms and Ecosystem Research, National Institute of Biology, Ljubljana, Slovenia.
12 Department of Organismal Biology, Université Libre de Bruxelles, Brussels, Belgium.
13 Stuttgart State Museum of Natural History, Stuttgart, Germany.
14 University of Ljubljana, Biotechnical Faculty, Department of Biology, SubBioLab, Ljubljana, Slovenia.
15 Université Claude Bernard Lyon 1, LEHNA UMR 5023, CNRS, ENTPE, Villeurbanne, France.
16 Interuniversity Institute of Bioinformatics in Brussels, Brussels, Belgium.
17 Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria.
18 School of Information Technology, University of Cincinnati, Cincinnati, OH, USA.
19 Department of Ecology and Hydrology, University of Murcia, Murcia, Spain.
20 Department of Science, Technology and Society, School for Advanced Studies, Pavia, Italy.
21 Universidad de La Laguna, Tenerife, Spain.
22 Department of Zoology, University of Sevilla, Sevilla, Spain.
23 Subterranean Research and Groundwater Ecology Group, Trace and Environmental DNA Lab, School of Molecular and Life Sciences, Curtin University, Perth, WA, Australia.
24 Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parma, Italy.
25 Department of Biological Sciences, California State University, Chico, CA, USA.