Microbe-mediated biogeochemical cycles contribute to the global climate system and have sensitive responses and feedbacks to environmental stress caused by climate change. Yet, little is known about the effects of microbial biodiversity (i.e., taxonmic and functional diversity) on biogeochemical cycles in ecosytems that are highly sensitive to climate change. One such sensitive ecosystem is Qin...

Soda lakes are one of the most stable naturally occurring alkaline and saline environments, which harbor abundant microorganisms with diverse functions. In this study, culture-independent molecular methods were used to explore the genetic diversity of glycoside hydrolase (GH) family 10 and GH11 xylanases in Lake Dabusu, a soda lake with a pH value of 10.2 and salinity of 10.1%. A total of 671 x...

As one of the largest hypersaline lakes, Lake Tuz, located in middle Turkey, is a key waterbird habitat and classified as Special Environmental Protection Area country. It dynamic lake, highly affected by evaporation due to its wide expanse shallowness (water depth <40 cm), addition being externally exploited salt companies. Monitoring dynamics changes volume, which cause ecological problems...

The study focuses on the distribution of algae in saline coastal water bodies Pryazov National Nature Park according to their habitat preferences. research revealed that aquatic species form basis algal flora. Among them, diatoms are predominant terms richness and frequency occurrence. In lake type estuaries ephemeral bodies, an increased number amphibious was found, which can be attributed var...

Four new anthraquinone derivatives 1-4 were obtained along with seven known compounds 5-11 from the extracts of the fungal strain Alternaria sp. XZSBG-1 which was isolated from the sediments of the carbonate saline lake in Bange, Tibet, China. Their structures were determined by spectroscopic methods, mainly by 2D NMR spectra. Compound 1 is a novel tetrahydroanthraquinone with an epoxy ether bo...

Chloropigments drive photosynthesis, an essentially important process in the biogeochemical cycles on Earth. Eukaryotic phototrophs have chlorophylls (Chl) a, b, and c, while prokaryotic phototrophs except for cyanobacteria, have bacteriochlorophylls (BChl) a, b, c, d, e, and g. In this study we report carbon and nitrogen isotopic compositions of chloropigments in the saline meromictic Lake Kai...

The effects of light and of added electron donors and sulfur compounds on sulfur metabolisms in the microbial mat dilutions from the saline meromictic Lake Kaiike were investigated. Sulfide concentrations in the mat dilution without any electron donor gradually increased by approximately 0.6-1 mM in the dark. Additions of lactate, acetate, H(2)/CO(2), propionate and iso-butylate stimulated sulf...

Deep-water renewal in Lake Baikal (Siberia), the world’s deepest lake and largest lake by volume, is relatively fast. Water age calculated from tritium and helium as well as from chlorofluorocarbons does not exceed 19 yr. Relative saturation of dissolved oxygen typically exceeds 80%. The equation of state of Baikal water was determined including the effect-of dissolved ions and silicic acid. Ba...

Acid-saline sediments in shallow-lake environments southwestern Australia host complex mineralogical suites representing long-term weathering and modern extreme acid-saline chemistry. It is not known whether large-scale reflectance spectroscopy datasets from watersheds across the Yilgarn Craton show regional variability. This study assesses over 2500 spectra of shallow subsurface by using autom...

Saline lakes provide a prey-rich, predator-free environment for birds to utilize during migration and stopover periods. The Great Salt Lake (GSL), Utah is the largest salt lake in North America and is utilized by millions of migratory birds. It also is host to multiple commercial endeavors. Proposed expansion of commercial use of the GSL would result in increased impounded area and water extrac...