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arXiv 1201.2045q-bio.PE
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空间相关三维根分枝结构网络中的传染病

Epidemics in Networks of Spatially Correlated Three-dimensional Root Branching Structures

T. P. Handford, F. -J. Perez-Reche, S. N. Taraskin, L. da F. Costa, M. Miazaki, F. M. Neri, C. A. Gilligan

摘要:

使用数字化图像的三维,分支结构的根系的豆类幼苗,连同分析和数值方法,映射到一个共同的“SIR”流行病学模型的债券渗流问题,我们显示了植物根系的空间相关的分支结构如何影响传输效率,因此入侵标准,土传病原体通过形态复杂的宿主群传播时,我们的结论是,内在的异质性所产生的相关性相邻植物之间的重叠程度的transmissibility,使人口的根系不太容易受到流行病的入侵比相应的同质系统。形态复杂性的几个组成部分进行了分析,有助于疾病和异质性的传染性。根的形状各向异性,以增加对流行病入侵的弹性,而增加分支的程度增强了流行病的传播的人口的根。对其他流行病学系统的方法的一些扩展进行了讨论。

英文摘要:

Using digitized images of the three-dimensional, branching structures for root systems of bean seedlings, together with analytical and numerical methods that map a common 'SIR' epidemiological model onto the bond percolation problem, we show how the spatially-correlated branching structures of plant roots affect transmission efficiencies, and hence the invasion criterion, for a soil-borne pathogen as it spreads through ensembles of morphologically complex hosts. We conclude that the inherent heterogeneities in transmissibilities arising from correlations in the degrees of overlap between neighbouring plants, render a population of root systems less susceptible to epidemic invasion than a corresponding homogeneous system. Several components of morphological complexity are analysed that contribute to disorder and heterogeneities in transmissibility of infection. Anisotropy in root shape is shown to increase resilience to epidemic invasion, while increasing the degree of branching enhances the spread of epidemics in the population of roots. Some extension of the methods for other epidemiological systems are discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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