Home Research Structure functional characteristics of microbial cenosises in Antarctica. Studying the role of microorganisms in biogeochemical cycles.
Structure functional characteristics of microbial cenosises in Antarctica. Studying the role of microorganisms in biogeochemical cycles. PDF Print E-mail

We analyzed samples from different biotopes and regions of western Antarctica. We found that methylotrophic microorganisms are widely spread in lichens, grass and mosses as well as in soils of Antarctica. Their quantity in different Antarctic biotopes is comparable with one in temperate climate regions (Ukraine for example). We did not find metal-resistant methylotrophic microorganisms in Antarctica.  Yet, in most of terrestrial biotopes (soils, mosses, lichens, lake silt, water, humus) of examined Antarctic regions we have found microorganisms resistant to high concentrations of heavy metals (100…500 mg ions per liter Сr, Cu, Cd or Hg). Thus, for the first time we identified the wide spreading of high concentration of heavy metal resistant microorganisms in Antarctica. The phenomenon originality lies in combination of:

•microorganisms’ ability to grow on high concentrations of heavy metals;
•incomparably low concentrations of heavy metals in Antarctic samples (from 0,02 to 40 mg/kg);
•metal resistant microorganisms presence in all terrestrial biotopes of Antarctica;
•high quantity of metal resistant microorganisms in these biotopes (104 … 105 cells/g of sample).