METHOD FOR DETERMINING THE DEGREE OF ANTHROPOGENIC IMPACT ON SETTLED FLOODPLAINS WITH PREDOMINANCE OF BLACK ALDER

摘要

FIELD: geobotany; ecology.;SUBSTANCE: in a method, indicator species are identified that determine the stage of community degradation, a general geobotanical characteristic of a surveyed territory is conducted with the identification of areas that are different in geobotanical terms. Complete floral and phytocenotic characteristics of a settled floodplain with predominance of black alder are obtained, accompanied by a map of the placement of phytocenoses and quantitative account of areas occupied by them. A geobotanical map is made up showing associations or groups of associations, stages of changes of indigenous phytocenoses. Analysis of the flora of settled floodplains and the identification of plant species that appear in phytocenoses and that are indicators of the intensity of anthropogenic impact are carried out for phyto-indicative forecasting of the state of settled floodplains with predominance of black alder: in black alder forests formed in marshy valleys of streams characterized by excessive stagnant moisture, following species reduce abundance under negative impact: Alnus glutinosa, Thelypteris palustris, Geum urbanum, Carex acuta, Salix viminalis; following species are indifferent to negative impact: Poa angustifolia, Rubus caesius; following species increase abundance under negative impact: Urtica dioica, Agrimonia eupatoria, Artemisia dracunculus, Arctium minus, Bromopsis inermis, Festuca valesiaca, Solanum dulcamara; in black alder forests formed at the outlet of reservoir waters and upper reaches of springs, following species reduce abundance under negative impact: Alnus glutinosa, Geum urbanum, Carex acuta, Ribes nigrum; following species are indifferent to negative impact: Rubus caesius, Galium palustre; following species increase abundance under negative impact: Agrimonia eupatoria, Arctium minus, Calystegia sepium, Solanum dulcamara. ;EFFECT: method provides an increase in the accuracy and rapidity of determining the degree of anthropogenic impact on uremes with predominance of black alder on the territory of Southern Ural.;1 cl, 1 dwg, 2 tbl