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Impact of sources of environmental degradation on microbial community dynamics in non-polluted and metal-polluted soils

机译:环境退化源对无污染和金属污染土壤中微生物群落动态的影响

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摘要

Soils are currently being degraded at an alarming rate due to increasing pressure from different sources of environmental degradation. Consequently, we carried out a 4-month microcosm experiment to measure the impact of different sources of environmental degradation (biodiversity loss, nitrogen deposition and climate change) on soil health in a non-polluted (non-degraded) and a heavily metal-polluted (degraded) soil, and to compare their responses. To this aim, we determined a variety of soil microbial properties with potential as bioindicators of soil health: basal respiration; (Vglucosaminidase and protease activities; abundance (Q-PCR) of bacterial, fungal and chitinase genes; richness (PCR-DGGE) of fungal and chitinase genes. Non-polluted and metal-polluted soils showed different response microbial dynamics when subjected to sources of environmental degradation. The non-polluted soil appeared resilient to "biodiversity loss" and "climate change" treatments. The metal-polluted soil was probably already too severely affected by the presence of high levels of toxic metals to respond to other sources of stress. Our data together suggests that soil microbial activity and biomass parameters are more sensitive to the applied sources of environmental degradation, showing immediate responses of greater magnitude, while soil microbial diversity parameters do not show such variations.
机译:由于来自不同环境退化源的压力增加,土壤目前正在以惊人的速度退化。因此,我们进行了为期4个月的微观实验,以测量在无污染(未降解)和重金属污染的环境中,环境退化的各种来源(生物多样性丧失,氮沉降和气候变化)对土壤健康的影响。 (退化)土壤,并比较他们的反应。为此,我们确定了多种土壤微生物特性,这些潜力具有潜在的土壤健康生物指标:基础呼吸; (葡糖胺半胱氨酸蛋白酶和蛋白酶活性;细菌,真菌和几丁质酶基因的丰度(Q-PCR);真菌和几丁质酶基因的丰富度(PCR-DGGE)。未污染的土壤和金属污染的土壤在受到微生物污染时表现出不同的响应微生物动力学环境退化:未污染的土壤似乎对“生物多样性丧失”和“气候变化”处理具有适应性;金属污染的土壤可能已经受到高含量有毒金属的严重影响,无法应对其他压力源。我们的数据一起表明,土壤微生物活性和生物量参数对应用的环境退化源更为敏感,显示出较大的即时响应,而土壤微生物多样性参数未显示出这种变化。

著录项

  • 来源
    《Science of the total environment》 |2012年第1期|p.264-272|共9页
  • 作者单位

    NEIKER-Tecnalia, Department of Ecology and Natural Resources, Soil Microbial Ecology Croup, C/Berreaga 1, E-48160 Derio, Spain;

    NEIKER-Tecnalia, Department of Ecology and Natural Resources, Soil Microbial Ecology Croup, C/Berreaga 1, E-48160 Derio, Spain;

    NEIKER-Tecnalia, Department of Ecology and Natural Resources, Soil Microbial Ecology Croup, C/Berreaga 1, E-48160 Derio, Spain;

    NEIKER-Tecnalia, Department of Ecology and Natural Resources, Soil Microbial Ecology Croup, C/Berreaga 1, E-48160 Derio, Spain;

    NEIKER-Tecnalia, Department of Ecology and Natural Resources, Soil Microbial Ecology Croup, C/Berreaga 1, E-48160 Derio, Spain;

    NEIKER-Tecnalia, Department of Ecology and Natural Resources, Soil Microbial Ecology Croup, C/Berreaga 1, E-48160 Derio, Spain;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    biodiversity loss; climate change; nitrogen deposition; resilience; resistance;

    机译:生物多样性丧失;气候变化;氮沉积弹性;抵抗性;
  • 入库时间 2022-08-17 13:54:48

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