Physically stable yet biologically sensitive: multiyear ecological dynamics of anoxygenic phototrophs in stably redox-stratified Lake Cadagno.

ABSTRACT: Lake Cadagno is a meromictic alpine lake characterized by permanent stratification, which creates a permanent anoxic environment that supports the growth of anoxygenic phototrophic sulfur bacteria. The seasonality and interseasonality of these microorganisms were examined over a three-year period (2019-2021) through regular monitoring of the water column. A variety of physical-chemical parameters, including temperature, conductivity, light, oxygen and sulfide concentrations, and the community composition of anoxygenic phototrophic sulfur bacteria in the chemocline were recorded, to observe potential influence of external weather conditions. Our findings indicate that, despite the lake's consistent physical and chemical stratification, the composition of the anoxygenic phototrophic sulfur b

SUBMITTER: Storelli N 

PROVIDER: S-EPMC12003485 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature