Effect of mineral composition on bacterial attachment to submerged rock surfaces

Mills, Aaron L.; Maubrey, Regis

doi:10.1007/bf02341426

Cited by 21 publications

(5 citation statements)

References 16 publications

(13 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…When the 2D cross-sections were compared with thinsections, activity by burrowing small infaunal organisms (i.e., microorganisms) appears to have improved reservoir quality by mechanically sorting the minerals by mineralogy (i.e., quartz grains preferentially). In short, microorganisms commonly feed on bacteria and diatoms that preferentially adhere to sand and feldspar minerals (Mills and Maubrey, 1981;Krejci and Lowe, 1986). As a result, cryptically bioturbated intervals appear to be reworked completely without actual obliteration of the preexisting sedimentary texture when viewed in 2D (e.g., whispy concentrations of clay, Figs.…”

Section: Upper Jurassic Ula Formation North Sea Norwaymentioning

confidence: 98%

Associating X-Ray Microtomography with Permeability Contrasts in Bioturbated Media

Baniak

Croix

Polo

et al. 2014

Ichnos

View full text Add to dashboard Cite

The use of X-ray microtomography (micro-CT) to evaluate the contrasts in permeability associated with bioturbation in twoand three-dimensions (2D and 3D) is investigated in this article. Core analysis, spot-permeametry measurements, and petrographic thin-sections of the six different datasets from Western Canada (Debolt Formation, Wabamun Group, and Medicine Hat Member) and offshore Norway (Ula Formation, Lysing Formation, and Nise Formation) show that the trace fossils commonly modify the permeability and porosity of the reservoir through sediment reworking and diagenesis of the sediment. In this study, micro-CT techniques are used to analyze the X-ray attenuation associated with bioturbation in siliciclastics and carbonates. Because X-ray attenuation represents the transmissivity or absorptivity of a sample to the incident X-rays, each of which is related to sediment composition and sediment densities, micro-CT images are integrated with sedimentological data and petrographic data to identify the trace fossils and matrix in 2D and 3D. Due to the difference in sediment grain size and sorting (i.e., porosity) within the burrows and matrix, analysis of the X-ray attenuations allows for their delineation in 2D cross-sectional images. When processed as 3D volumes, the micro-CT images show the complexity in burrow connectivity and burrow orientations within a sample. More importantly, the 3D volumes help show the distribution of porosity that can be linked to measured permeability values within a sample. Quantification of the heterogeneous burrow fabric on reservoir and resource quality is made from these processed micro-CT images.

show abstract

Section: Upper Jurassic Ula Formation North Sea Norwaymentioning

confidence: 98%

Associating X-Ray Microtomography with Permeability Contrasts in Bioturbated Media

Baniak

Croix

Polo

et al. 2014

Ichnos

View full text Add to dashboard Cite

show abstract

“…The attachment and growth of microorganisms on submerged rocks are common in moderateto fast-flowing rivers (17,20). These epilithic microbial populations benefit from the high concentrations of organic and inorganic compounds that accumulate at the solid-liquid interface and are commonly more active in terms of their metabolic activity than their planktonic counterparts (15).…”

mentioning

confidence: 99%

Mineral Precipitation by Epilithic Biofilms in the Speed River, Ontario, Canada

Konhauser

Schultze-Lam

Ferris

et al. 1994

Appl Environ Microbiol

110

View full text Add to dashboard Cite

Epilithic microbial communities, ubiquitously found in biofilms on submerged granite, limestone, and sandstone, as well as on the concrete support pillars of bridges, were examined in the Speed River, Ontario, Canada. Transmission electron microscopy showed that attached bacteria (on all substrata) were highly mineralized, ranging from Fe-rich capsular material to fine-grained (<1 ,um) authigenic (primary) mineral precipitates. The authigenic grains exhibited a wide range of morphologies, from amorphous gel-like phases to crystalline structures. Energy-dispersive X-ray spectroscopy indicated that the most abundant mineral associated with epilithic bacteria was a complex (Fe, Al) silicate of variable composition. The gel-like phases were similar in composition to a chamositic clay, whereas the crystalline structures were more siliceous and had compositions between those of glauconite and kaolinite. The consistent formation of (Fe, Al) silicates by all bacterial populations, regardless of substratum lithology, implies that biomineralization was a surface process associated with the anionic nature of the cell wall. The adsorption of dissolved constituents from the aqueous environment contributed significantly to the mineral formation process. In this regard, it appears that epilithic microbial biofilms dominate the reactivity of the rock-water interface and may determine the type of minerals formed, which will ultimately become part of the riverbed sediment. Because rivers typically contain high concentrations of dissolved iron, silicon, and aluminum, these findings provide a unique insight into biogeochemical activities that are potentially widespread in natural waters.

show abstract

“…The formation of nontransient adherent communities (i.e., biofilms) of microorganisms on submerged surfaces is common in both freshwater and marine environments (17,18,30,41). These attached microbial populations benefit from the enriched nutrient status of solid-liquid interfaces and may be more active in terms of metabolic activity than their planktonic counterparts (15).…”

mentioning

confidence: 99%

Metal Interactions with Microbial Biofilms in Acidic and Neutral pH Environments

Ferris

Schultze

Witten

et al. 1989

Appl Environ Microbiol

256

View full text Add to dashboard Cite

Microbial biofilms were grown on strips of epoxy-impregnated filter paper submerged at four sites in water contaminated with metals from mine wastes. At two sample stations, the water was acidic (pH 3.1); the other sites were in a lake restored to a near neutral pH level by application of a crushed limestone slurry. During a 17-week study period, planktonic bacterial counts increased from 10' to 103 CFU/ml at all sites. Biofilm counts increased rapidly over the first 5 weeks and then leveled to 104 CFU/cm2 in the neutral pH system and 103 CFU/cm2 at the acidic sites. In each case, the biofilms bound Mn, Fe, Ni, and Cu in excess of the amounts adsorbed by control strips covered with nylon filters (pore size, 0.22 ,um) to exclude microbial growth; Co bound under neutral conditions but not under acidic conditions. Conditional adsorption capacity constants, obtained graphically from the data, showed that bioffilm metal uptake at a neutral pH level was enhanced by up to 12 orders of magnitude over acidic conditions. Similarly, adsorption strength values were usually higher at elevated pH levels. In thin sections of the biofilms, encapsulated bacterial cells were commonly found enmeshed together in microcolonies. The extracellular polymers often contained iron oxide precipitates which generated weak electron diffraction patterns with characteristic reflections for ferrihydrite (Fe2O3 H20) at d equaling 0.15 and 0.25 nm. At neutral pH levels, these deposits incorporated trace amounts of Si and exhibited a granular morphology, whereas acicular crystalloids containing S developed under acidic conditions.

show abstract

Effect of mineral composition on bacterial attachment to submerged rock surfaces

Cited by 21 publications

References 16 publications

Associating X-Ray Microtomography with Permeability Contrasts in Bioturbated Media

Associating X-Ray Microtomography with Permeability Contrasts in Bioturbated Media

Mineral Precipitation by Epilithic Biofilms in the Speed River, Ontario, Canada

Metal Interactions with Microbial Biofilms in Acidic and Neutral pH Environments

Contact Info

Product

Resources

About