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首页> 美国卫生研究院文献>other >Microbial secondary succession in soil microcosms of a desert oasis in the Cuatro Cienegas Basin Mexico
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Microbial secondary succession in soil microcosms of a desert oasis in the Cuatro Cienegas Basin Mexico

机译：墨西哥Cuatro Cienegas盆地沙漠绿洲土壤微镜具的微生物二次继承

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摘要

Ecological succession is one of the most important concepts in ecology. However for microbial community succession, there is a lack of a solid theoretical framework regarding succession in microorganisms. This is in part due to microbial community complexity and plasticity but also because little is known about temporal patterns of microbial community shifts in different kinds of ecosystems, including arid soils. The Cuatro Cienegas Basin (CCB) in Coahuila, Mexico, is an arid zone with high diversity and endemisms that has recently been threatened by aquifer overexploitation. The gypsum-based soil system of the CCB is one of the most oligotrophic places in the world. We undertook a comparative 16S rRNA 454 pyrosequencing study to evaluate microbial community succession and recovery over a year after disturbance at two sites. Results were related to concurrent measurements of humidity, organic matter and total C and N content. While each site differed in both biogeochemistry and biodiversity, both present similar pattern of change at the beginning of the succession that diverged in later stages. After one year, experimentally disturbed soil was not similar to established and undisturbed adjacent soil communities indicating recovery and succession in disturbed soils is a long process.
机译：生态演替是生态学中最重要的概念之一。但是，对于微生物群落演替，缺乏关于微生物演替的可靠理论框架。这部分是由于微生物群落的复杂性和可塑性引起的，而且还因为人们对包括干旱土壤在内的各种生态系统中微生物群落迁移的时间模式知之甚少。墨西哥Coahuila的Cuatro Cienegas盆地（CCB）是一个具有高度多样性和特有性的干旱地区，最近受到含水层过度开发的威胁。 CCB的石膏基土壤系统是世界上最贫营养的地区之一。我们进行了一项比较性的16S rRNA 454焦磷酸测序研究，以评估两个地点发生干扰后一年内微生物群落的演替和恢复情况。结果与同时测量湿度，有机质以及总碳和氮含量有关。尽管每个地点的生物地球化学和生物多样性都不同，但在演替开始时都呈现出相似的变化模式，但在后期却有所不同。一年后，实验扰动的土壤与已建立且未受干扰的邻近土壤群落不同，这表明扰动土壤的恢复和演替是一个漫长的过程。

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