The Ladoga skerries region encompasses the lake’s north-western littoral strip composed of a number of rocky island archipelagoes and half-islands separated by narrow straits. Comprehensive monitoring and digital mapping of this region using geoinformation technologies and remotely sensed data are of great importance for investigating the natural and anthropogenic dynamics of its ecosystems. It was revealed, for instance, that at least 33.3 % of lichen and ericetal pine forests on Tulolansaari Archipelago islands had endured surface fires of various intensity during the last 30 years. They were most probably caused by human activities, particularly recreation. Also, abandoned farmlands are getting actively overgrown with trees and shrubs. Over the said time span, the total area of grasslands within the investigated area shrank by 37.4 %.