土壤网络异质性对微生物入侵的显著影响
Prominent effect of soil network heterogeneity on microbial invasion
摘要：
使用网络表示为真正的土壤样品和微生物传播的数学模型，我们表明，土壤生境的结构异质性可能有一个非常显着的影响微生物入侵的土壤孔隙空间的大小。特别是，忽略土壤结构的异质性可能会导致微生物入侵大大低估。这种影响的解释在微生物传播的异质性和土壤网络的拓扑结构的异质性之间的一个至关重要的相互作用。网络拓扑结构对入侵的主要影响与土壤网络中长通道的存在有关，这些长通道可以作为微生物在土壤遥远部分之间传播的桥梁。
英文摘要：
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.
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