Prominent Effect of Soil Network Heterogeneity on Microbial Invasion
Prominent Effect of Soil Network Heterogeneity on Microbial Invasion
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DOI：
10.1103/physrevlett.109.098102
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发表时间：
2012-08-29
影响因子：
8.6
通讯作者：
Gilligan, C. A.
中科院分区：
文献类型：
--
作者：
Perez-Reche, F. J.;Taraskin, S. N.;Gilligan, C. A.
使用真实土壤样本的网络表示和微生物传播的数学模型，我们表明土壤栖息地的结构异质性可能对微生物入侵土壤孔隙空间的大小产生非常显着的影响。特别是，忽视土壤结构异质性可能会导致微生物入侵的严重低估。这种效应可以用微生物传播的异质性和土壤网络拓扑的异质性之间的关键相互作用来解释。网络拓扑对入侵的主要影响与土壤网络中长通道的存在有关，这些长通道可以充当微生物在土壤远距离部分之间传播的桥梁。
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 invasions of the soil pore space. In particular, neglecting the soil structural heterogeneity may lead to a substantial underestimation of microbial invasion. Such effects are explained in terms of a crucial interplay between heterogeneity in microbial spread and heterogeneity in the topology of soil networks. The main influence of network topology on invasion is linked to the existence of long channels in soil networks that may act as bridges for transmission of microorganisms between distant parts of soil.