Simple Summary Cyanobacteria are known as oxygenic microorganisms are able to release
oxygen as a byproduct during photosynthesis. Rapidly changing environmental conditions …

The biotic and abiotic controls on major shifts in atmospheric oxygen and the persistence of
low-oxygen periods over a majority of Earth's history remain under debate. Explanations of …

Biogeochemical cycling of sulfur is relatively understudied in terrestrial environments
compared to marine environments. However, the comparative ease of access, observation …

Diatoms are among the few eukaryotes known to store nitrate (NO3−) and to use it as an
electron acceptor for respiration in the absence of light and O2. Using microscopy and 15N …

The permanently stratified water columns in euxinic meromictic lakes produce niche
environments for phototrophic sulfur oxidizers and diverse sulfur metabolisms. While Green …

Diverse cyanobacteria play an important role in improving local environments in desert
ecosystems by forming biocrusts. Seasonal changes can directly or indirectly affect the …

Modern microbial mats are potential analogues for Proterozoic ecosystems, yet only a few
studies have characterized mats under low-oxygen conditions that are relevant to …

Cyanobacteria can perform both anoxygenic and oxygenic photosynthesis, a characteristic
which ensured that these organisms were crucial in the evolution of the early Earth and the …

Seasonal changes in light and physicochemical conditions have strong impacts on
cyanobacteria, but how they affect community structure, metabolism, and biogeochemistry of …

Cyanobacterial mats profoundly influenced Earth's biological and geochemical evolution
and still play important ecological roles in the modern world. However, the biogeochemical …