1. Madrid Institute for Advanced Studies; IMDEA Water Institute; Technological Scientific Park of the University of Alcalá; C/Punto Com n° 2 28805 Alcalá de Henares Madrid Spain
2. Institute of Speleology ‘Emil Racoviţă’; Romanian Academy; Clinicilor 5 400006 Cluj-Napoca Romania
3. Senckenberg Biodiversity and Climate Research Centre (BiK-F); Senckenberganlage 25 60325 Frankfurt Germany
4. Stable Isotope Laboratory; Ştefan cel Mare University; Universităţii 13 Suceava 720229 Romania
5. Department of Geography; Ştefan cel Mare University; Universităţii 13 Suceava 720229 Romania
6. Faculty of Forestry; Ştefan cel Mare University; Universităţii 13 Suceava 720229 Romania