Skip to main content

12 Result(s)

within Robert J. Mitchell Remove this filter Ecology Remove this filter

and

  1. No Access

    Article

    Diffusible Signaling Factor, a Quorum-Sensing Molecule, Interferes with and Is Toxic Towards Bdellovibrio bacteriovorus 109J

    Bdellovibrio bacteriovorus 109J is a predatory bacterium which lives by predating on other Gram-negative bacteria to obtain the nutrients it needs for replication and survival. Here, we evaluated the effects two ...

    Mohammed Dwidar, Hyochan Jang, Naseer Sangwan, Wonsik Mun, Hansol Im… in Microbial Ecology (2021)

  2. No Access

    Article

    Interactions Among Abiotic Drivers, Disturbance and Gross Ecosystem Carbon Exchange on Soil Respiration from Subtropical Pine Savannas

    Globally, soil CO2 efflux rates (Fs) have been linked to changes in soil water content (SWC), rainfall and temperature and/or productivity. However, within an ecosystem, Fs can vary based on site structure and fu...

    Susanne Wiesner, Christina L. Staudhammer, Henry W. Loescher… in Ecosystems (2018)

  3. No Access

    Article

    Attack-Phase Bdellovibrio bacteriovorus Responses to Extracellular Nutrients Are Analogous to Those Seen During Late Intraperiplasmic Growth

    Bdellovibrio bacteriovorus is a predatory bacterium which lives by invading the periplasm of gram-negative bacteria and consuming them from within. This predator was thought to be depende...

    Mohammed Dwidar, Hansol Im, Jeong Kon Seo, Robert J. Mitchell in Microbial Ecology (2017)

  4. No Access

    Article

    Shedding Light on Microbial Predator–Prey Population Dynamics Using a Quantitative Bioluminescence Assay

    This study assessed the dynamics of predation by Bdellovibrio bacteriovorus HD 100. Predation tests with two different bioluminescent strains of Escherichia coli, one expressing a heat-labile bacterial luciferase...

    Hansol Im, Dasol Kim, Cheol-Min Ghim, Robert J. Mitchell in Microbial Ecology (2014)

  5. No Access

    Article

    Soil Fungi Respond More Strongly than Fine Roots to Elevated CO2 in a Model Regenerating Longleaf Pine-Wiregrass Ecosystem

    Rising atmospheric CO2 concentration will affect belowground processes and forest function. However, the direction and magnitude of change for many soil processes are unknown. We used minirhizotrons to observe fi...

    M. Luke McCormack, Seth G. Pritchard, Sabrie Breland, Michael A. Davis… in Ecosystems (2010)

  6. No Access

    Article

    Nitrogen decreases and precipitation increases ectomycorrhizal extramatrical mycelia production in a longleaf pine forest

    The rates and controls of ectomycorrhizal fungal production were assessed in a 22-year-old longleaf pine (Pinus palustris Mill.) plantation using a complete factorial design that included two foliar scorching (co...

    Stephanie E. Sims, Joseph J. Hendricks, Robert J. Mitchell, Kevin A. Kuehn… in Mycorrhiza (2007)

  7. No Access

    Article

    Fine root branch orders respond differentially to carbon source-sink manipulations in a longleaf pine forest

    Fine roots are a key component of carbon (C) flow and nitrogen (N) cycling in forest ecosystems. However, the complexity and heterogeneity of the fine root branching system have hampered the assessment and pre...

    Dali L. Guo, Robert J. Mitchell, Joseph J. Hendricks in Oecologia (2004)

  8. No Access

    Article

    Spatio-temporal patterns of soil available nutrients following experimental disturbance in a pine forest

    Although disturbance is known to alter soil nutrient heterogeneity, it remains unclear whether spatial patterns in soil nutrients after disturbance follow predictable temporal changes that reflect underlying p...

    Dali Guo, Pu Mou, Robert H. Jones, Robert J. Mitchell in Oecologia (2004)

  9. No Access

    Article

    Controls of fine root dynamics across a gradient of gap sizes in a pine woodland

    Controls of fine dynamics were investigated in a Pinus palustris Mill. (longleaf pine) woodland subjected to two understory vegetation treatments (control versus removed) and four overstory treatments (no gap co...

    Robert H. Jones, Robert J. Mitchell, Glen N. Stevens, Stephen D. Pecot in Oecologia (2003)

  10. No Access

    Article

    The effects of fire regime on legume reproduction in longleaf pine savannas: is a season selective?

    The biodiversity of fire-dependent ecosystems is increasingly threatened by habitat fragmentation and fire suppression. Reducing species loss requires that salient features of natural fire regimes be incorpor...

    J. Kevin Hiers, Robert Wyatt, Robert J. Mitchell in Oecologia (2000)

  11. No Access

    Article

    Influence of CO2 enrichment and nitrogen fertilization on tissue chemistry and carbon allocation in longleaf pine seedlings

    One-year old, nursery-grown longleaf pine (Pinus palustris Mill.) seedlings were grown in 45-L pots containing a coarse sandy medium and were exposed to two concentrations of atmospheric CO2 (365 or 720 μmol-1) a...

    James A. Entry, G. Brett Runion, Stephen A. Prior, Robert J. Mitchell… in Plant and Soil (1998)

  12. No Access

    Article

    Root to shoot ratio of crops as influenced by CO2

    Crops of tomorrow are likely to grow under higher levels of atmospheric CO2. Fundamental crop growth processes will be affected and chief among these is carbon allocation. The root to shoot ratio (R:S, defined as...

    Hugo H. Rogers, Stephen A. Prior, G. Brett Runion, Robert J. Mitchell in Plant and Soil (1995)