GET TO KNOW THE ENVIRONMENT
Man, health and environment
Terrestrial habitats in the area of the Una National Park are meadows, pastures and forests. Most of the surface of the National Park is covered by different types of forests, both climazonal and extrazonal and azonal. The grasslands of the National Park represent anthropogenic permanent stages, and can be maintained only with constant indirect (grazing) or direct (mowing) human influence. The area is rich in limestone rocks that are inhabited by chasmophytic plants (fissure plants). Beneath larger rocky hills, under the influence of the hydrosphere and atmosphere, parts of the rocks break off, roll down the slope, thus creating in places sinkholes. At higher positions above the canyon itself, on level ground with deeper fine soil, lawns from the Brometalia erecti order have been developed in places. Water habitats include the area of the Una and Unca rivers. The Una and Unac rivers themselves do not have developed aquatic macrophytic vegetation in the research area, but only sporadically in small, quiet lagoons, some macrophytic species can be found here and there. Wet habitats in the observed area include wet and marshy grasslands, tall greens and reeds. In the area along the river Una itself, hygrophilous communities of willow, alder, rickets and willows have developed. Due to their specific ecological conditions, the habitats on travertine waterfalls represent a special biotope, which is significantly different from all other habitats in fresh waters. In total, 42 types of plants, 25 types of algae and 17 types of moss, were found on the falls, excluding higher plants and diatoms. All these plants participate in the construction of travertine formations, except for 2 types of hepatica. The majority are therefore porophytes, while only a small number are aporophytes.
