A synthetic quality index to evaluate the functional stability of soil microbial communities after perturbations
نویسندگان
چکیده
Soil stability includes both resistance, the ability to withstand a perturbation or stress, and resilience, recover pre levels. The functional of soil microbial communities is paramount importance for ecosystem functioning. We investigated differences in (resistance resilience) three enzyme activities (hydrolytic, laccase peroxidase) different forest (holm oak, black pine beech) soils after addition PAHs (phenanthrene, pyrene benzo[a]pyrene) with molecular weights. Furthermore, we proposed new quality index (MAI) based on measured activity values, useful quantify ecological impact perturbations (PAH exposure our case). degradation rates follow their complexity, slowing increasing PAH weight all types. Moreover, found higher resistance “broad scale” (hydrolase), respect two “narrow-niche” (laccase peroxidase). results demonstrate content recalcitrant organic matter (soil under pine), compared labile holm oak). In particular, less affected by phenanthrene pine; peroxidase shows resilience beech added. Resistance and/or contamination, observed hydrolytic soils, mainly due high diversity enzymes expressing this type catalytic activity.
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ژورنال
عنوان ژورنال: Ecological Indicators
سال: 2021
ISSN: ['1470-160X', '1872-7034']
DOI: https://doi.org/10.1016/j.ecolind.2021.107844