Conservation of forest ecosystems in regional complex nature reserves Olga Zolotova, Elizaveta Ivanishcheva, Oksana Bazhenova, Alena Osolodkina and Ekaterina Sokolova E3S Web Conf., 411 (2023) 02057 Published online: 10 August 2023 DOI: 10.1051/e3sconf/202341102057