The article presents estimation of the ecological state of soil phototrophic microbe complex in forest and meadow ecosystems in the vicinity of the former chemical weapons destruction facility “Maradykovskiy” (CWDF). Currently, a production and technical complex “Ecotechnopark “Mirnyy” (PTK) for the disposal of wastes of the 1st and 2nd hazard classes is being created on its territory. Natural groups of algae and cyanobacteria (CB) has a set of physiologicalbiochemical and ecological features and are widely used in soil state ecological assessing. Nowadays the algocyanoflora communities’ structure within the site of PTC is typical for the forest zone. As for species diversity in forests soils, representatives of Chlorophyta (60.0 %) and Ochrophyta (20.0 %) prevail, while Chlorophyta (44.2 %) and Cyanobacteria (29.5 %) dominate in meadow soils. Still the long-term monitoring of algae and CB in forest and meadow soil ecosystems indicated that certain changes took place in the phototrophic complex of microorganisms during the CWDF operating period. The share of ochrophyte algae sensitive to technogenic load decrease from 19.2 % to 17.0 %, while the share of CB increase from 24.7 % to 26.4 %. CBs are highly tolerant to the changing factors of the environment, thus they serve as a reliable indicator in assessing its ecological status. The dominant species are represented by green and ochrophyte algae, typical in forest soils. The species of the genera Chlamydomonas, Chlorococcum (Chlorophyta), Phormidium, Nostoc, Cylindrospermum (Cyanobacteria) are the dominants of the communities in meadow ecosystems. The quantitative indexes of the algae and CB number are conditioned mostly by natural factors. On the control site situated 10 km away from the PTC the indexes of algae and CB number were higher than those near the PTC: they exceeded two or more times. Over 10 years passed from the moment when CWDF stopped functioning. The taxonomic composition of algocyanoflora still keeps its original structure.
ISSN 1995-4301
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