Enhancing iron biogeochemical cycling for ecosystem restoration: insights from microbial stimuli.

Introduction: The microbial-induced restoration of ferruginous crusts (), which partially cover iron deposits and host unique ecosystems, is a promising alternative for reducing the environmental impacts of the iron mining industry.

Methods: To investigate the potential of microbial action to accelerate the reduction and oxidation of iron in substrates rich in hematite and goethite, four different microbial treatments (water only as a control - W; culture medium only - MO; medium + microbial consortium - MI; medium + microbial consortium + soluble iron - MIC) were periodically applied to induce iron dissolution and subsequent precipitation. Except for W, all the treatments resulted in the formation of biocemented blocks.

Acquiring Iron-Reducing Enrichment Cultures: Environments, Methods and Quality Assessments.

Lateritic duricrusts cover iron ore deposits and form spatially restricted, unique ecosystems endangered by mining. Iron cycling, i.e.

Comparative Genomics of Serotype 8 Reveals the Importance of Prophages in the Genetic Variability of the Species.

is the etiologic agent of porcine pleuropneumonia. Currently, there are 18 different serotypes; the serotype 8 is the most widely distributed in the United States, Canada, United Kingdom, and southeastern Brazil. In this study, genomes of seven serotype 8 clinical isolates were compared to the other genomes of twelve serotypes.

Enrichment of arbuscular mycorrhizal fungi in a contaminated soil after rehabilitation.

Spore counts, species composition and richness of arbuscular mycorrhizal fungi, and soil glomalin contents were evaluated in a soil contaminated with Zn, Cu, Cd and Pb after rehabilitation by partial replacement of the contaminated soil with non-contaminated soil, and by Eucalyptus camaldulensis planting with and without Brachiaria decumbens sowing. These rehabilitation procedures were compared with soils from contaminated non-rehabilitated area and non-contaminated adjacent soils. Arbuscular mycorrhizal fungi communities attributes were assessed by direct field sampling, trap culture technique, and by glomalin contents estimate.