Now showing items 1-11 of 11

  • Bayesian estimation for percolation models of disease spread in plant populations 

    Gibson, G. J.; Otten, Wilfred; Filipe, J. A. N.; Cook, A.; Marion, G.; Gilligan, C. A. (Springer Verlag, 2006-12)
    Statistical methods are formulated for fitting and testing percolation-based, spatio-temporal models that are generally applicable to biological or physical processes that evolve in spatially distributed populations. The ...
  • Biological invasion in soil: complex network analysis 

    Perez-Reche, Francisco J.; Taraskin, S. N.; Neri, F. M.; Gilligan, C. A.; da F. Costa, L.; Viana, M. P.; Otten, Wilfred; Grinev, D. (Institute of Electrical and Electronics Engineers, 2009-07)
    A network model for soil pore space is developed and applied to the analysis of biological invasion of microorganisms in soil. The model was parameterized for two soil samples with different compaction (loosely and densely ...
  • Damping-off epidemics, contact structure, and disease transmission in mixed-species populations 

    Otten, Wilfred; Filipe, J. A. N.; Gilligan, C. A. (Ecological Society of America, 2005-07)
    In this paper we introduce a method to analyze the inter- and intraspecies transmission rates and contact structure between susceptible and infected plants in epidemics in mixed plant populations. Using spatiotemporal maps ...
  • An empirical method to estimate the effect of soil on the rate for transmission of damping-off disease 

    Otten, Wilfred; Filipe, J. A. N.; Gilligan, C. A. (Wiley-Blackwell, 2004-04)
    The ability of some soils to suppress soil-borne diseases has been long recognised, but the underlying epidemiological mechanisms by which this occurs are largely unknown.• Using damping-off disease caused by Rhizoctonia ...
  • A fungal growth model fitted to carbon-limited dynamics of Rhizoctonia solani 

    Jeger, M. J.; Lamour, A.; Gilligan, C. A.; Otten, Wilfred (Wiley-Blackwell, 2008-05)
    Here, a quasi-steady-state approximation was used to simplify a mathematical model for fungal growth in carbon-limiting systems, and this was fitted to growth dynamics of the soil-borne plant pathogen and saprotroph ...
  • Inferring the dynamics of a spatial epidemic from time-series data 

    Filipe, J. A. N.; Otten, Wilfred; Gibson, G. J.; Gilligan, C. A. (Springer Verlag, 2004-03)
    Spatial interactions are key determinants in the dynamics of many epidemiological and ecological systems; therefore it is important to use spatio-temporal models to estimate essential parameters. However, spatially-explicit ...
  • Percolation-based risk index for pathogen invasion: application to soilborne disease in propagation systems 

    Poggi, S.; Neri, F. M.; Deytieux, V.; Bates, A.; Otten, Wilfred; Gilligan, C. A.; Bailey, D. J. (American Phytopathological Society, 2013-10)
    Propagation systems for seedling growth play a major role in agriculture, and in notable cases (such as organic systems), are under constant threat from soil and seedborne fungal plant pathogens such as Rhizoctonia solani ...
  • Preferential spread of the pathogenic fungus Rhizoctonia solani through structured soil 

    Otten, Wilfred; Harris, K.; Young, Iain M.; Ritz, K.; Gilligan, C. A. (Elsevier Science B.V., Amsterdam, 2004-02)
    Most studies on soil fungi have been carried out with little explicit characterisation of soil structure within which fungi spread and biotic interactions occur. In this paper we use a combination of epidemiological ...
  • Prominent effect of soil network heterogeneity on microbial invasion 

    Pérez-Reche, Francisco J.; Taraskin, S. N.; Otten, Wilfred; Viana, M. P.; da F. Costa, L.; Gilligan, C. A. (American Physical Society, 2012)
    Using a network representation for real soil samples and mathematical models for microbial spread, we show that the structural heterogeneity of the soil habitat may have a very significant influence on the size of microbial ...
  • Quantification and analysis of transmission rates for soilborne epidemics 

    Otten, Wilfred; Filipe, J. A. N.; Bailey, D. J.; Gilligan, C. A. (Ecological Society of America, 2003)
    The rates of transmission of infection from inoculum or infecteds to susceptible hosts are critical determinants of epidemics, yet no formal experimental methods have been described for their quantification and analysis ...
  • Soil structure and soil-borne diseases: using epidemiological concepts to scale from fungal spread to plant epidemics 

    Otten, Wilfred; Gilligan, C. A. (Wiley-Blackwell, 2006-02)
    Many epidemics of root diseases involving soil fungi depend on the interplay between fungal growth and the spatial and temporal heterogeneity of the soil environment. Colonization or infection of a root occurs at fine ...