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首页> 外文期刊>Antonie van Leeuwenhoek: Journal of Microbiology and serology >Primary succession of soil enzyme activity and heterotrophic microbial communities along the chronosequence of Tianshan Mountains No. 1 Glacier, China
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Primary succession of soil enzyme activity and heterotrophic microbial communities along the chronosequence of Tianshan Mountains No. 1 Glacier, China

机译：天山一号冰川沿时间序列的土壤酶活性和异养微生物群落的一次演替

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摘要

We investigated the primary successions of soil enzyme activity and heterotrophic microbial communities at the forefields of the Tianshan Mountains No. 1 Glacier by investigating soil microbial processes (microbial biomass and nitrogen mineralization), enzyme activity and community-level physiological profiling. Soils deglaciated between 1959 and 2008 (0, 5, 17, 31 and 44 years) were collected. Soils > 1,500 years in age were used as a reference (alpine meadow soils). Soil enzyme activity and carbon-source utilization ability significantly increased with successional time. Amino-acid utilization rates were relatively higher in early, unvegetated soils (0 and 5 years), but carbohydrate utilization was higher in later stages (from 31 years to the reference soil). Discriminant analysis, including data on microbial processes and soil enzyme activities, revealed that newly exposed soils (0-5 years) and older soils (17-44 years) were well-separated from each other and obviously different from the reference soil. Correlation analysis revealed that soil organic carbon, was the primary factor influencing soil enzyme activity and heterotrophic microbial community succession. Redundancy analysis suggested that soil pH and available P were also affect microbial activity to a considerable degree. Our results indicated that glacier foreland soils have continued to develop over 44 years and soils were significantly affected by the geographic location of the glacier and the local topography. Soil enzyme activities and heterotrophic microbial communities were also significantly influenced by these variables.
机译：我们通过调查土壤微生物过程（微生物生物量和氮矿化），酶活性和群落水平的生理分布，研究了天山第一冰川前场土壤酶活性和异养微生物群落的主要演替。收集了在1959年至2008年（0、5、17、31和44年）期间发生过冰冻的土壤。年龄大于1500年的土壤用作参考（高山草甸土壤）。土壤酶活性和碳源利用能力随着时间的推移而显着增加。在无植被的早期土壤（0和5年）中，氨基酸利用率相对较高，但在后期（从31年到参考土壤），氨基酸利用率较高。判别分析（包括有关微生物过程和土壤酶活性的数据）显示，新暴露的土壤（0-5年）和较旧的土壤（17-44年）彼此分离良好，并且与参考土壤明显不同。相关分析表明，土壤有机碳是影响土壤酶活性和异养微生物群落演替的主要因素。冗余分析表明，土壤的pH值和有效磷也对微生物的活性有很大的影响。我们的结果表明，冰川前陆土壤已经持续发展了超过44年，并且土壤受到冰川地理位置和当地地形的显着影响。这些变量也显着影响土壤酶活性和异养微生物群落。

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