subprovinces are parts of the Central European floristic province in the Circumboreal Region of the Holarctic Kingdom. Ecology and habitat This predominantly coniferous forest is composed mainly of suboceanic (Leucobryo-Pinetum) and subcontinental (Peucedano-Pinetum) young Scots pine forest habitat types covering 64.5% of the area of land habitats, as well as of dry acidophilous Scots pine forest (Cladonio-Pinetum) covering 2.5% of the area, and of marshy pine forest (Vaccinio-uliginosi-Pinetum). The Habitats Directive classifies the initial three habitat types jointy as the Central European lichen Scots pine forest habitat type, and the last one as belonging to bog woodlands habitat type, all belonging to the Forests of Temperate Europe group. The habitat classification of the European Nature Information System classifies the first type as belonging to subcontinental moss Pinus sylvestris forests, the second and the third type belong to subcontinental lichen Pinus sylvestris forests, while the fourth belongs to nemoral Pinus sylvestris mire forests. Deciduous forest habitats cover minority of the forest area, mainly swamps, and include: Vaccinio-uliginosi-Betuletum-pubescentis birch bog forest, Ribeso-nigri-Alnetum alder carr, Fraxino-Alnetum riparian forest. The occurrence of other phytocenoses such as for instance Betulo-Quercetum roboris, Molinio-Pinetum or Stellario-Carpinetum, is considered to be of fragmentary nature or in the form of deformed phytocenoses. The forest belongs to the Baltic mixed forests ecoregion located in the European Continental Biogeographic Region, belonging to the temperate broadleaf and mixed forests biome of the Palearctic realm. The area is covered by the drainage basins of Brda and Wda, belonging to the Lower Vistula Basin, a part of the Vistula Basin emptying into the Baltic Sea, classified together with the rest of Central & Western Europe as temperate floodplain rivers and wetlands of the Palearctic realm. Forestry For the purposes of forestry, Poland is divided in eight nature and forest lands, divided into nature and forest mesoregions, largely based on the borders of geomorphological mesoregions. The bulk of Tuchola Forest is located in the 3rd Greater Polish-Pomeramian Nature and Forest Land, where the forest covers the Tuchola Forest nature and forest mesoregion formed by merging the Tuchola Forest and the Charzykowy Plain geomorphological mesoregions, with the northernmost part of the merged unit being detached to form a separate Zaborski nature and forest mesoregion, also covered by the forest. Other nature and forest mesoregions of the 2nd Land which are partially covered by the forest include the Świecie Plain, the Brda River Valley and the Krajna