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Nombre original EUR28

6280 - * Nordic alvar and precambrian calcareous flatrocks

Descripción original en inglés (EUR28)

Nordic alvar and Precambrian calcareous flatrocks are very species-rich ecosystems, with an ecological character strongly influenced by winter climatic conditions. Where a thin soil layer exists, it is often frozen to ice and covered with snow. Plants and animals have special adaptations to these conditions. For example the invertebrates must have strategies for overwintering. Annual freezing and thawing give rise to movements at the soil surface creating small patches of bare soil occupied by annual plants, a number of which are rare. The flat rocks may be covered with a thin layer of soil, which is the product of weathering of the underlying rock. The flora and fauna is very rich in species and many of them are rare.

Especies presentes (EUR28)