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. The paper presents results of a survey of natural monuments in the Śrem county, Poland. The survey inventoried eight avenues, 30 tree clusters, six erratics, two localities of a protected plant species, and 85 trees-natural monuments. Among all trees the most numerous group comprised small-leaved limes (447 trees – 36.6%), horse chestnuts (372 Aesculus hippocastanum – 30.4%) as well as Acer platanoides and Quercus robur (with 99 trees each – 8.1%). Among single trees classified as natural monuments the greatest numbers belong to Quercus robur (34 trees – 40.0%) as well as Aesculus hippocastanum and Tilia cordata (with 8 trees each – 9.4%). In the area of the survey there are 30 clusters of trees registered as natural monument. These clusters comprise 99 trees belonging to eight species. Among them English oaks vastly predominate – 65 trees (65.7%). Eight avenues are composed of 1038 trees belonging to seven species. The avenue with the highest number of trees is situated in Przylepki (the Brodnica comune), extending for 1.5 km and composed of 265 Tilia cordata specimens. Former manor and palace parks in the Śrem county account for 33% trees-natural monuments and 63% tree clusters. Considerable differences were recorded in the numbers of natural monuments registered in individual decades – in the 1950’s nine natural monuments were established (6.9% total number of natural monuments), in the 1960’s – one (0.8%), the 1970’s – one (0.8%), the 1980’s – 41 (31.3%), the 1990’s – 73 (55.7%), while in the first decade of the 21st century six natural monuments were registered (4.6%).

Natural monuments in the Śrem county (Wielkopolska Voivodeship, Poland)