There are four basic biom in NP Pelister, as well as elements of biom. (Biom is a space with uniform climatic conditions and where ecosystem complexes develop, one of which dominates. Basically, biomes are large ecosystems. Examples of biomes are tundra, taiga, steppe, desert, etc.).
• Sub-Mediterranean biom, mainly deciduous forests and deciduous (Mediterranean-Balkan forest zoono-biom. The sub-Mediterranean biomass, mainly deciduous forests and deciduous forests, extends at an altitude of 300 to about 1000 m. of the Querco-Carpinetum orientalis u Quercetum frainetto-cerris, which are distributed in the extreme northwestern part of NP Pelister (Tutunica).
• Biom of southern European, mostly deciduous forests (zono-biom and oro-biom of Balkan-Central European forests). It usually occupies heights between 500 and 800 m. As part of this zoonobioma, the Pelister forests may include the Orno-Quercetum petraeae, the Festuco heterophyllae (Fagetum u Calamintho grandifloraee-Fagetum).
• Biom of European, mostly coniferous forests of the Boreal type (Orobiom of European forests of taiga sweat). European taiga forests cover northeastern Europe today, and in the Balkan mountains they are found in the form of small spots on the north-facing slopes. Pelister is home to some of the most important forest ecosystems in Macedonia, such as the pine (Pinus peuce) and fir forests.
• Biom of high mountain rocks, pastures and snowmobiles (highland mountain rocks, tundra and high mountain pastures). The orbit of high-mountain rocks, tundra and high-mountain pastures today occupies the peaks of European mountains. In the Balkan mountains, parts of over 2000 m above sea level can be included in this obrobiom. In Pelister, this community can include all communities that develop on the highest parts, above the forest border.