Cold, water-saturated soils play important biogeochemical roles, yet almost nothing is known about the identity and habitat of microbes active under such conditions. We investigated the year-round microenvironment of an alpine tundra wet meadow soil in the Colorado Rocky Mountains, focusing on the biogeochemistry and microbial diversity of spring snowmelt--a dynamic time for alpine ecosystems. ...

Abstract The mineralization and humification of organic matter triggered by added exogenous carbon are relevant to soil (SOM) turnover stability. Biochar (BC) artificial humic substance (A‐HS), two typical materials, have not been jointly applied seek improve the pool, which is contributed development A‐HS has yet used on a large‐scale. We surmise that dynamic interactions occurring in combined...

Abstract. Soil freeze–thaw processes play a fundamental role in the hydrology, geomorphology, ecology, thermodynamics, and soil chemistry of cold regions' landscapes. In understanding these processes, temperature is used as proxy to represent partitioning ice water content via freezing characteristic curve (SFCC). This mathematical construct relates specific for particular soil. SFCCs depend on...

Biological residues in soil dust are a potentially strong source of atmospheric ice nuclei (IN). So far, however, the abundance, diversity, sources, seasonality, and role of biological – in particular, fungal – IN in soil dust have not been characterized. By analysis of the culturable fungi in topsoils, from a range of different land use and ecosystem types in southeast Wyoming, we found ice-nu...

Acidic deposition is comprised of sulfuric and nitric acids and ammonium derived from atmospheric emissions of sulfur dioxide, nitrogen oxides, and ammonia, respectively. Acidic deposition has altered soil through depletion of labile pools of nutrient cations (i.e. calcium, magnesium), accumulation of sulfur and nitrogen, and the mobilization of elevated concentrations of inorganic monomeric al...