Selection of micro‐organisms in a spatially explicit environment and implications for plant access to nitrogen
Selection of micro‐organisms in a spatially explicit environment and implications for plant access to nitrogen
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空间明确环境中微生物的选择及其对植物获取氮的影响
DOI：
10.1046/j.1365-2745.1998.8650841.x
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发表时间：
1998
影响因子：
5.5
通讯作者：
J. Harte
中科院分区：
文献类型：
--
作者：
A. Kinzig;J. Harte
微生物氮吸收策略的演变，以低于最大潜在速率去除氮，创造了有利于增加植物获得氮的土壤环境。因此，植物生产力增加，并通过增加微生物对植物来源的碳的获取来促进实现最大微生物生物量。模拟表明，表现出这种“战略性”氮吸收的微生物将在均质系统中被更贪婪的微生物竞争性地排除，但可以在空间明确的系统中持续存在。这种不太贪婪的微生物的持久性与经常持有的观点形成对比，即土壤系统中的微生物以最大可能的速率吸收氮。在空间明确的环境中选择战略性或贪婪的微生物类型对植物和微生物干扰的频率以及土壤系统中无机氮的扩散速率很敏感。特别是，战略（不太贪婪）的微生物类型的植物干扰低，低到中度的无机氮扩散，和中度微生物干扰的条件下，青睐。当选择有利于战略微生物类型时，植物获得氮的机会增加。植物也可以在空间明确的环境中进化策略，这将增加有利的战略微生物类型的种群密度。
Evolution of a microbial nitrogen‐uptake strategy that removes nitrogen at less than the maximum potential rate creates soil environments favourable for increased plant access to nitrogen. Plant productivity is thus increased, and achievement of maximum microbial biomass is facilitated through increased microbial access to plant‐derived carbon. Simulations show that micro‐organisms exhibiting such a ‘strategic’ nitrogen uptake will be competitively excluded by more voracious micro‐organisms in a homogeneous system, but can persist in a spatially explicit system. This persistence of less voracious micro‐organisms contrasts with the frequently held view that micro‐organisms in soil systems take up nitrogen at the maximum possible rate. The selection of strategic or voracious microbial types in a spatially explicit environment is sensitive to the frequency of plant and microbial disturbance, and to the rate of diffusion of inorganic nitrogen in the soil system. In particular, the strategic (less voracious) microbial types are favoured under conditions of low plant disturbance, low to moderate diffusion of inorganic nitrogen, and moderate microbial disturbance. When selection favours strategic microbial types, plant access to nitrogen is increased. Plants may also evolve strategies in a spatially explicit environment that will increase population densities of favourable, strategic microbial types.
影响因子：
2
作者：
FRANK, SA
通讯作者：
FRANK, SA