Биоразнообразие в байкальском регионе: уровни, подходы, состояние изученности (растительный мир)

On the basis of analysis for approaches to researches of biodiversity, a hierarchy of their basic levels is given in the paper. Four centre points of biodiversity display are considered, these are a species diversity, P coenosis (community) diversity, у landscapes (ecosystem) diversity, and e biokhorology (regional) diversity. The two latter are still the worst worked. On the landscapes level a revealing of diversity of spatial territory units, and on the higher regional level of biogeografical diversity is required. A state of knowledge of Baikal Siberia diversity according to above-mentioned levels of its structure is considered (on an example of the plant kingdom). It is shown that species richness has been revealed most completely (2359 species and subspecies, 600 genus and 115 families). The diversity of syntaxa was determined extremely irregular because of usage of different approaches. The last reason causes trouble to compare of the syntaxa. Steppes have been investigated better: referring to K. Osipov (1995), they are presented in volume of 70 formations. On the y-level an inventory work has actually just started. For the revelation of diversity on the region level special (разработки) arc required. Probably, as at biogeographical interpretation of diversity as at division into districts