The conservation of genetic resources and the succession of vegetation in reserves and national parks

An unexpected and uncontrollable succession of vegetation in national parks and reserves causes the impoverishment of a gene pool of plants. This process has been observed mainly in seminatural communities and distorted natural phytocoenoses. A programme of practical endeavours should be based on a conscious management of the succession. It has to take into account the entire caryologic, ecological and sociologic variability of each species as well as to lean on a thorough study of a degree of naturalness and dynamics of the communities in which the species exist