Microbial Processes and Microbial Communities in the Water Column of the Polar Meromictic Lake Bol'shie Khruslomeny at the White Sea Coast.

ABSTRACT: Microbiological, molecular ecological, biogeochemical, and isotope geochemical research was carried out at the polar Lake Bol'shie Khruslomeny at the coast of the Kandalaksha Bay, White Sea in March and September 2017. The uppermost mixolimnion was oxic, with low salinity (3-5%). The lower chemocline layer was brown-green colored, with very high content of particulate organic matter (up to 11.8 mg C L^-1). The lowermost monimolimnion had marine salinity (22-24%) and very high concentrations of sulfide (up to 18 mmol L^-1) and CH₄ (up to 1.8 mmol L^-1). In the chemocline, total microbial abundance and the rate of anoxygenic photosynthesis were 8.8 × 10⁶ cells mL^-1 and 34.4 μmol C L^-1 day^-1, respectively. Bo

SUBMITTER: Savvichev AS 

PROVIDER: S-EPMC7432294 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature