| depth distribution of microbial diversity in mono lake, a meromictic soda lake in california. | we analyzed the variation with depth in the composition of members of the domain bacteria in samples from alkaline, hypersaline, and currently meromictic mono lake in california. dna samples were collected from the mixolimnion (2 m), the base of the oxycline (17.5 m), the upper chemocline (23 m), and the monimolimnion (35 m). composition was assessed by sequencing randomly selected cloned fragments of 16s rrna genes retrieved from the dna samples. most of the 212 sequences retrieved from the sam ... | 2003 | 12571026 |
| increased fecundity associated with infection by a cytophaga-like intracellular bacterium in the predatory mite, metaseiulus occidentalis. | the endosymbiont wolbachia has gained widespread notoriety over the past decade because of its high infection frequency among arthropods, and the unique heterogeneity of the host reproductive effects that it has been implicated as causing to enhance its own spread. recently, another endosymbiotic bacterium from the cytophaga-flavobacterium-bacteroides phylum has been shown to be widespread among arthropods and manipulate its hosts' reproduction to enhance its own spread. we show that infection b ... | 2004 | 15252981 |
| a shallow btex and mtbe contaminated aquifer supports a diverse microbial community. | microbial communities in subsurface environments are poorly characterized and the impacts of anthropogenic contamination on their structure and function have not been adequately addressed. the release of contaminant(s) to a previously unexposed environment is often hypothesized to decrease the diversity of the affected community. we characterized the structure of microbial communities along a gradient of benzene, toluene, ethylbenzene, and xylene (btex) and methyl-tert-butyl-ether (mtbe) contami ... | 2004 | 15696392 |
| bacterial community analysis of shallow groundwater undergoing sequential anaerobic and aerobic chloroethene biotransformation. | at department of energy site 300, beneficial hydrocarbon cocontaminants and favorable subsurface conditions facilitate sequential reductive dechlorination of trichloroethene (tce) and rapid oxidation of the resultant cis-dichloroethene (cis-dce) upon periodic oxygen influx. we assessed the geochemistry and microbial community of groundwater from across the site. removal of cis-dce was shown to coincide with oxygen influx in hydrocarbon-containing groundwater near the source area. principal compo ... | 2007 | 17386036 |
| diel fluctuations in the abundance and community diversity of coastal bacterioplankton assemblages over a tidal cycle. | the diel change in abundance and community diversity of the bacterioplankton assemblages within the pacific ocean at a fixed location in monterey bay, california (usa) were examined with several culture-independent (i.e., nucleic acid staining, fluorescence in situ hybridization {fish}, and 16s ribosomal rna gene libraries) approaches over a tidal cycle. fish analyses revealed the quantitative predominance of bacterial members belonging to the cytophaga-flavobacterium cluster as well as two prot ... | 2011 | 21915631 |