The unique nature monuments of the Chai River basin (Tomsk oblast, Western Siberia)

Brief information is given on the nature and the monuments of nature in the basin of the Chaya river in the Chainskiy district of the Tomsk oblast. The current state of the main natural attractions of the area, described in the scientific works of the beginning of the XX century, is considered: the 'Kulayka mountain' – a natural and ancient monument of the peoples of Siberia and a wild habitat of linden (TIlia cordata Mill.) trees – a relic of the Tertiary Era. The general analysis of the expansion of linden in the Western Siberian region is provided. The data is provided on the isolated locations of the linden habitats in the Western Siberia beyond its modern habitat. The chief attention is given to the description of the natural habitat of linden on the right bank of the Chaya river in the Tomsk oblast. A history of discovery, research and protection of the 'Linden Island' in the Tomsk region is summarized. The main reasons for the study of the 'Linden Island' on the Chaya river are presented. The specifics of the ecological status of T. cordata in the harsh conditions of the Western Siberia are considered. The data on the current state of the 'Linden Island' in the Tomsk oblast are presented in comparison with the data from the previous researchers. It proposes measures to ensure protection of the unique natural monuments in the Chaya river basin