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The aim of the presented research was to study and assess Total Suspended Particle mitigation capacity of Fraxinus excelsior and Platanus orientalis - the two most widespread tree species in Yerevan. It turned out that in the conditions of Yerevan, both tree species show high efficiency of TSP mitigation. In this regard, we recommend using P. orientalis and F. excelsior in Yerevan green infrastructure as wide as possible, especially along the highways, in the industrial areas of the city, and in areas with intensive construction. [ABSTRACT FROM AUTHOR]

The article considers the results of the study on community structure and ecosystem services of trees of the first section of Circular Park - one of the largest parks in Yerevan, Armenia. Totally 757 trees, representing 27 species were identified. The results of the tree condition assessment indicated that 55% of the examined trees were in poor condition. Across all trees, the most common diameter at breast height (hereafter referred to as DBH) and height respectively fell within the 16-30 cm and 6-11 m size classes, which reflects the presence of a high number of middle-aged trees. The data obtained via i-Tree canopy showed that the combined air pollution removal ecosystem service for trees was valued at approximately $1.290, for carbon storage and sequestration - $32,815. [ABSTRACT FROM AUTHOR]