Processes in Microbial Transport in the Natural Subsurface

Ginn, Timothy R.; Wood, Brian D.; Nelson, K. E.; Scheibe, Timothy D.; Murphy, Ellyn M.; Clement, T. Prabhakar

doi:10.1002/chin.200323283

Cited by 85 publications

(128 citation statements)

References 59 publications

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“…Frequency of strains belonging to each k cluster was estimated according to the origin of the sample: above ground surface substrates including snowpack and leaf litter (hatched bars) or water that had percolated through the soil (grey bars). and vegetation cover (Abu-Ashour et al, 1994;Ginn et al, 2002). Evaluating the intraspecific variability of transfer rate relative to the physical-chemical structure of soil and land occupation is challenging.…”

Section: Pseudomonas Syringae Is Transported By Water Through Tens Ofmentioning

confidence: 99%

Soil water flow is a source of the plant pathogen Pseudomonas syringae in subalpine headwaters

Monteil¹,

Lafolie²,

Laurent

et al. 2013

Environmental Microbiology

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The airborne plant pathogenic bacterium Pseudomonas syringae is ubiquitous in headwaters, snowpack and precipitation where its populations are genetically and phenotypically diverse. Here, we assessed its population dynamics during snowmelt in headwaters of the French Alps. We revealed a continuous and significant transport of P.syringae by these waters in which the population density is correlated with water chemistry. Via in situ observations and laboratory experiments, we validated that P.syringae is effectively transported with the snow melt and rain water infiltrating through the soil of subalpine grasslands, leading to the same range of concentrations as measured in headwaters (10(2) -10(5) CFU l(-1) ). A population structure analysis confirmed the relatedness between populations in percolated water and those above the ground (i.e. rain, leaf litter and snowpack). However, the transport study in porous media suggested that water percolation could have different efficiencies for different strains of P.syringae. Finally, leaching of soil cores incubated for up to 4 months at 8°C showed that indigenous populations of P.syringae were able to survive in subalpine soil under cold temperature. This study brings to light the underestimated role of hydrological processes involved in the long distance dissemination of P.syringae.

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Section: Pseudomonas Syringae Is Transported By Water Through Tens Ofmentioning

confidence: 99%

Soil water flow is a source of the plant pathogen Pseudomonas syringae in subalpine headwaters

Monteil¹,

Lafolie²,

Laurent

et al. 2013

Environmental Microbiology

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“…McCarthy and McKay [18] and Sen et al [122] mentioned in their article that there is a substantial body of published research on microbial transport in the subsurface, much of it focuses on transport in the saturated zone [119][120][121][122][123][124][125][126][127][128][129][130][131][132][133][134]. Transport of bacteria in porous media is mainly bounded with small scale batch and column studies.…”

Section: Biocolloids Transportmentioning

confidence: 99%

Review on subsurface colloids and colloid-associated contaminant transport in saturated porous media

Sen

Khilar

2006

Advances in Colloid and Interface Science

374

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“…Factors that influence particle behavior include the particle density, size and surface chemistry, the water chemistry, the interstitial velocity, and the characteristics of the porous medium itself. In the case of biological particles, motility, chemotaxis, growth and decay are also influential [Ginn et al, 2002].…”

Section: Introductionmentioning

confidence: 99%

Modeling particle transport in downward and upward flows

Basha

Culligan

2010

Water Resources Research

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[1] Experimental data obtained for particle transport in downward and upward flows in smooth and rough porous media are analyzed at various flow rates. The data analysis and interpretation are aided through an analytical model with linear kinetics that assumes two sites for particle deposition within a medium, namely, reversible and irreversible, together with a dual mode of irreversible deposition. The bimodal particle transport model is obtained using the Green's function method and is capable of fitting, with reasonable accuracy, the observed transport and deposition behavior of particles. Approximations for advection-dominated flows are also obtained that could represent a simplified modeling tool. Expressions of the temporal moments are developed and algebraic equations are derived that express the model parameters in terms of the moments of the measured particle concentration distributions. The transport models helped define the relationship of the modeled parameters to flow velocity and media roughness. The fitting results show that the parameters for rough and smooth media vary in a systematic way with the pore fluid velocity. The results also reveal that flow direction has a significant influence on the mode and magnitude of irreversible particle deposition for the conditions investigated. For the same seepage velocity, the rate of particle deposition is greater for upward flows than for downward flows. Moreover, roughness effects increase the irreversible particle deposition in downward flows but have little effect in upward flows.Citation: Basha, H. A., and P. J. Culligan (2010), Modeling particle transport in downward and upward flows, Water Resour.

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Processes in Microbial Transport in the Natural Subsurface

Cited by 85 publications

References 59 publications

Soil water flow is a source of the plant pathogen Pseudomonas syringae in subalpine headwaters

Soil water flow is a source of the plant pathogen Pseudomonas syringae in subalpine headwaters

Review on subsurface colloids and colloid-associated contaminant transport in saturated porous media

Modeling particle transport in downward and upward flows

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