GRID MAPPING IN STUDYING THE DISTRIBUTION OF LICHENS OF THE GENUS USNEA (AS APPLIED TO THE TERRITORY OF THE MOSCOW REGION)

The literature review and analysis of a herbarium fruticose epiphytic lichens Usnea (genus: Dill. Ex Adans.) from 450 points located in the Moscow region (Moscow Oblast – MO) showed presence five species territory. These can be found on branches spruce pine, less often birch, some finds are noted black gray alder, rowan, willow. emergence development MO is possible strictly certain conditions. Firstly, microclimatic parameters required such as sufficiently high humidity surface air layer minimal indicators tropospheric pollution (absence harmful compounds content dust particles). Secondly, groups plant communities, old-growth forests, suitable phorophyte must present. Schemes provided article demonstrate locations maximum diversity individual per 100 km2 study area. richest Lotoshino Taldom districts at intersection Volokolamsk, Ruza, Istra districts, where there no large polluting industrial objects and, according to ecomonitoring data, quality highest (with lowest levels substances hirta U. dasopoga most widespread genus MO. lapponica glabrescens rarest species, subfloridana relatively rare. reliability habitat florida, glabrata has not been confirmed yet. mainly present western north-western portions rarely south-eastern portion sites near big cities. Ecologically gravitate toward wet waterlogged coniferous glades, small foliar trees along river valleys, well edge parts forested marshes raised bogs. In these landscapes, thallus reaches size. occur frequently cover abundantly tree trunks with multi-species sets 2–4 epiphyte (including other taxa). Thus, ecological situation concluded favorable.