Map of sites in the Pirin Mountain mentioned in text: 13. Lake Ribno Banderishko (Tonkov et al., 2002; Tonkov, Possnert, 2021); 14. Lake Muratovo (Bozilova et al., 2004); 15. Peat bog Mozgovitsa (Tonkov, 2003; Marinova, Tonkov, 2012); 16. Peat bog Mutorog and 17. Peat bog Popovi Livadi (Panovska et al., 1995); P. Peat bog Praso (Stefanova, Oeggl, 1993); B. Lake Bezbog (Stefanova et al., 2006); PE-6. Lake Popovo Ezero-6 (Stefanova, Bozilova, 1995); K-5. Lake Kremensko-5 (Atanassova, Stefanova, 2003; Stefanova et al., 2006).