“…for the Cave Salamander Proteus anguinus (Gorički et al 2017, Vörös et al 2017, the Alabama Cave Crayfish Cambarus speleocoopi (Boyd et al 2020) and Hay's Spring Amphipod Stygobromus hayi and its more widespread congener S. tenuis potomacus (Niemiller et al 2017). Finally, DNA or eDNA metabarcoding-based surveys can help to reach a more comprehensive understanding of the subterranean community in a given ecosystem, e.g., by increasing taxonomic resolution and including so far underrepresented taxa such as fungi, protists, diatoms, bacteria, cyanobacteria, algae and mosses (Sohlberg et al 2015, Miettinen et al 2015, Nawaz et al 2018, Korbel et al 2017, Pfendler et al 2018, Alaoui-Sosse et al 2021). Metabarcoding approaches have been also utilised to characterise the diets of bats (Galan et al 2018) and to identify ancient rodent remains (Guimaraes et al 2016).…”