Congratulations to Maria Alekseeva, an employee of the Laboratory of Soil Carbon and Microbial Ecology, on the successful defense of her master's thesis titled «The Effect of Temperature on the Structure of the Prokaryotic Community of a Typical Chernozem Contaminated with Oil». The defense took place on May 26 at the Department of Soil Biology, Faculty of Soil Science, Lomonosov Moscow State University.