Impact of tourism on pristine habitats at the Avachinsky Pass (Kamchatka), a World Heritage Site

The volcanoes of Kamchatka are a World Heritage Site. They are of aesthetic, conservation, and scientific value; therefore, they must be protected from negative anthropogenic influences. However, according to the recent assessment by the International Union for Conservation of Nature, this site inspires significant concern. A similar viewpoint was also expressed in the local press. A part of the site, Avachinsky Pass, inspires a particular concern. This is a place between the volcanoes Koryaksky and Avachinsky. An excessive number of visitors was considered the main threat because it resulted in the trampling of soil and the extirpation of threatened animals. We performed a survey of the Avachinsky Pass aiming to estimate its state. Based on aerial pictures and observation we composed a scheme of habitats over the area around Avachinsky Pass revealing the disturbed plots of land. Moreover, we registered vertebrates considering them as biological indicators. It became clear that tourism has a significant impact on the state of the Avachinsky Pass, but the affected area is relatively small. Despite a large number of visitors, the survey revealed high biodiversity. We registered 19 species of birds and 9 species of mammals. Among them, black-capped marmots are especially informative as they have a settled way of life; they do occur on the Pass. The absence of grazing and logging contributes to the conservation of elfin forests and other plant communities on the slopes making the object resistant to anthropogenic impacts. Off-road vehicles pose the biggest threat to bare-ground revegetation.