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Functional metabolic diversity of the bacterial community in undisturbed resource island soils in the southern Sonoran Desert
Land Degradation & Development ( IF 3.6 ) Pub Date : 2018-03-08 , DOI: 10.1002/ldr.2905
D. Edisa Garcia 1 , Blanca R. Lopez 1, 2 , Luz E. de-Bashan 1, 2, 3 , Ann M. Hirsch 4, 5 , Maskit Maymon 4 , Yoav Bashan 1, 2, 3
Affiliation  

Resource islands (RIs), a natural revegetation phenomenon in arid lands, consist of a single nurse tree or few large shrubs and numerous understory nurslings. We analyzed 18 individual mesquite RIs for plant diversity and richness, area, trunk diameter (reflecting age), soil characteristics, physiological functionality of microbial populations, and interactions among these variables. Nursing Capacity reflected the availability of habitat and was positively correlated to plant richness, but not to plant diversity. No relationship between plant diversity and bacterial diversity was found. The structure of the bacterial communities of RIs differed from the bacterial communities of bare areas, which showed greater richness and diversity compared with those of RIs. The Nursing Capacity of the RIs was related to plant richness and accompanied by variations in soil properties. A high correlation was found by substrate utilization analysis between metabolic parameters of bacteria and diversity and richness of plants in the RIs. RI bacterial communities were more metabolically active and could degrade different carbon sources than bare area communities. RI bacterial communities contained species with greater capability to metabolize diverse carbon substrates in soil with more organic matter. Bacteria from low, medium, and high plant diversity areas were cultured and found to belong to four bacterial families. This study demonstrates that numerous parameters interact, but not every parameter significantly affected bacterial activity in the RI.

中文翻译:

索诺兰沙漠南部未受干扰资源岛土壤中细菌群落的功能代谢多样性

资源岛 (RI) 是干旱地区的一种自然重新植被现象,由一棵护士树或少数大灌木和众多林下苗木组成。我们分析了 18 个单独的豆科灌木 RI,包括植物多样性和丰富度、面积、树干直径(反映年龄)、土壤特征、微生物种群的生理功能以及这些变量之间的相互作用。护理能力反映了栖息地的可用性,与植物丰富度呈正相关,但与植物多样性无关。没有发现植物多样性和细菌多样性之间的关系。RIs的细菌群落结构与裸露地区的细菌群落结构不同,与RIs相比,显示出更大的丰富度和多样性。RI 的护理能力与植物丰富度有关,并伴随着土壤性质的变化。通过底物利用分析发现细菌代谢参数与 RI 中植物的多样性和丰富度之间存在高度相关性。与裸区群落相比,RI 细菌群落具有更高的代谢活性,并且可以降解不同的碳源。RI 细菌群落包含的物种在具有更多有机质的土壤中代谢不同碳底物的能力更强。培养了来自低、中和高植物多样性地区的细菌,发现它们属于四个细菌科。该研究表明,许多参数相互作用,但并非每个参数都显着影响 RI 中的细菌活性。通过底物利用分析发现细菌代谢参数与 RI 中植物的多样性和丰富度之间存在高度相关性。与裸区群落相比,RI 细菌群落具有更高的代谢活性,并且可以降解不同的碳源。RI 细菌群落包含的物种在具有更多有机质的土壤中代谢不同碳底物的能力更强。培养了来自低、中和高植物多样性地区的细菌,发现它们属于四个细菌科。该研究表明,许多参数相互作用,但并非每个参数都显着影响 RI 中的细菌活性。通过底物利用分析发现细菌代谢参数与 RI 中植物的多样性和丰富度之间存在高度相关性。与裸区群落相比,RI 细菌群落具有更高的代谢活性,并且可以降解不同的碳源。RI 细菌群落包含的物种在具有更多有机质的土壤中代谢不同碳底物的能力更强。培养了来自低、中和高植物多样性地区的细菌,发现它们属于四个细菌科。该研究表明,许多参数相互作用,但并非每个参数都显着影响 RI 中的细菌活性。与裸区群落相比,RI 细菌群落具有更高的代谢活性,并且可以降解不同的碳源。RI 细菌群落包含的物种在具有更多有机质的土壤中代谢不同碳底物的能力更强。培养了来自低、中和高植物多样性地区的细菌,发现它们属于四个细菌科。该研究表明,许多参数相互作用,但并非每个参数都显着影响 RI 中的细菌活性。与裸区群落相比,RI 细菌群落具有更高的代谢活性,并且可以降解不同的碳源。RI 细菌群落包含的物种在具有更多有机质的土壤中代谢不同碳底物的能力更强。培养了来自低、中和高植物多样性地区的细菌,发现它们属于四个细菌科。该研究表明,许多参数相互作用,但并非每个参数都显着影响 RI 中的细菌活性。
更新日期:2018-03-08
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