Head of Department: Assoc. Prof. Yanka Vidinova, PhD Division of Biodiversity and functioning of freshwater ecosystems Head: Assoc. Prof. Apostolos Apostolou, PhD Biodiversity, communities and processes in freshwater ecosystems RG Assoc. Prof. Mihaela Beshkova, PhD (RG Leader) Assoc. Prof. Yanka Vidinova, PhD Assoc. Prof. Vesela Evtimova, PhD Professor Yordan Uzunov PhD (volunteer) Chief Assistant Stefan Stoichev, PhD Chief Assistant Borislava Gyosheva, PhD Chief Assistant Veselka Tsavkova, PhD Biologist Monika Subeva, PhD Assessment of fish populations and resources RG Assoc. Prof. Apostolos Apostolou, PhD (RG Leader) Assoc. Prof. Luchezar Pehlivanov, PhD (volunteer) Chief Assistant Milena Pavlova, PhD Biologist Boris Velkov Invasive alien species RG Assoc. Prof. Teodora Trichkova, PhD (RG Leader) Assoc. Prof. Hristina Kalcheva, PhD Polina Nikova, PhD Student biologist Yuri Vanev Bioindicators, monitoring and ecological classification of freshwater ecosystems RG Chief Assistant Stefan Kazakov, PhD (Acting RG Leader) Prof. Emilia Varadinova, PhD Assoc. Prof. Violeta Tyufekchieva, PhD Chief Assistant Plamen Ivanov, PhD Chief Assistant Rabia Soufi, PhD Chief Assistant Tsvetelina Isheva, PhD Chief Assistant Mila Ihtimanska, PhD Chief Assistant Galia Georgieva-Mladenova, PhD Division of Functional Ecology and Bioresources of Marine and Coastal Ecosystems Head: Prof. Georgi Daskalov, PhD Assoc. Prof. Ventsislav Karamfilov, PhD Chief Assistant Dimitar Berov, PhD Chief Assistant Stefania Klayn, PhD Chief Assistant Yoana Georgieva, PhD Chemist Yana Vrubcheva Chemist Petya Chapevova Dimitar Dimov Nikola Bobchev, PhD Student