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Microbial Ecology

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  1. Decomposition of Cr(V)-diols to Cr(III) complexes by Arthrobacter oxydans.

    Microbial Ecology 57(2):360 (2009) PMID 19067030

    We demonstrated previously that Cr(VI) is readily reduced to oxoCr(V)-diols at the surface of Arthrobacter oxydans-a Gram-positive aerobic bacteria isolated from Columbia basalt rocks originated from a highly contaminated site in the USA. Here, we report an electron spin resonance (ESR) study of...
  2. Respiration in the light and bacterio-phytoplankton coupling in a coastal environment.

    Microbial Ecology 57(2):321 (2009) PMID 18661115

    In pelagic ecosystems, the principal source of organic matter is via autotrophic production and the primary sink is through heterotrophic respiration. One would therefore anticipate that there is some degree of linkage between these two compartments. Recent work has shown that respiration in the...
  3. PCR-DGGE comparison of bacterial community structure in fresh and archived soils sampled along a Chihuahuan Desert elevational gradient.

    Microbial Ecology 57(2):261 (2009) PMID 19107315

    The polymerase chain reaction coupled with denaturing gradient gel electrophoresis (PCR-DGGE) has been used widely to determine species richness and structure of microbial communities in a variety of environments. Researchers commonly archive soil samples after routine chemical or microbial anal...
  4. The effect of copper on the structure of the ammonia-oxidizing microbial community in an activated sludge wastewater treatment plant.

    Microbial Ecology 57(2):215 (2009) PMID 18677527

    Molecular approaches based on both whole-cell and extracted DNA were applied to assess chronic and acute effects of copper on the ammonia oxidizing bacteria (AOB) community in an activated sludge system. The ammonia monooxygenase amoA gene was chosen as the functional marker to evaluate changes ...
  5. Bioremediation of dyes in textile effluents by Aspergillus oryzae.

    Microbial Ecology 57(2):384 (2009) PMID 18989608

    In this study Aspergillus oryzae was utilized to remove azo dyes from aqueous solution. Physically induced in its paramorphogenic form to produce standardized mycelial pellets, the non-autoclaved and autoclaved hyphae biomass was applied to biosorb the reactive dyes Procion Red HE7B (PR-HE7B) an...
  6. Bacterial communities associated with the digestive tract of the predatory ground beetle, Poecilus chalcites, and their modification by laboratory rearing and antibiotic treatment.

    Microbial Ecology 57(2):349 (2009) PMID 18587608

    Ground beetles such as Poecilus chalcites (Coleoptera: Carabidae) are beneficial insects in agricultural systems where they contribute to the control of insect and weed pests. We assessed the complexity of bacterial communities occurring in the digestive tracts of field-collected P. chalcites us...
  7. Southern African biological soil crusts are ubiquitous and highly diverse in drylands, being restricted by rainfall frequency.

    Microbial Ecology 57(2):229 (2009) PMID 18850242

    Biological soil crusts (BSCs) are found in all dryland regions of the world, including the polar regions. They are also known to occur in the southern African region. Although there were a number of case studies on BSCs from that region, we did not know if they are a normal part of the vegetatio...
  8. Identification and genetic characterization of phenol-degrading bacteria from leaf microbial communities.

    Microbial Ecology 57(2):276 (2009) PMID 19034559

    Microbial communities on aerial plant leaves may contribute to the degradation of organic air pollutants such as phenol. Epiphytic bacteria capable of phenol degradation were isolated from the leaves of green ash trees grown at a site rich in airborne pollutants. Bacteria from these communities ...
  9. Bacterial succession within an ephemeral hypereutrophic Mojave Desert playa Lake.

    Microbial Ecology 57(2):307 (2009) PMID 18758846

    Ephemerally wet playas are conspicuous features of arid landscapes worldwide; however, they have not been well studied as habitats for microorganisms. We tracked the geochemistry and microbial community in Silver Lake playa, California, over one flooding/desiccation cycle following the unusually...
  10. Soil microbial community response to drought and precipitation variability in the Chihuahuan Desert.

    Microbial Ecology 57(2):248 (2009) PMID 19067031

    Increases in the magnitude and variability of precipitation events have been predicted for the Chihuahuan Desert region of West Texas. As patterns of moisture inputs and amounts change, soil microbial communities will respond to these alterations in soil moisture windows. In this study, we exami...