Department of Environmental Microbiology and Biotechnology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University in Toruń, Lwowska 1, 87-100 Toruń, Poland.
Department of Soil Science and Landscape Management, Faculty of Earth Sciences and Spatial Management, Nicolaus Copernicus University in Toruń, Lwowska 1, 87-100 Toruń, Poland.
Sci Total Environ. 2023 Dec 20;905:167380. doi: 10.1016/j.scitotenv.2023.167380. Epub 2023 Sep 28.
The importance of the microbiome in the functioning of degraded lands in industrialised zones is significant. However, little is known about how environmental parameters affect microbial abundance, structure, diversity, and especially specific guilds involved in the nitrogen cycle in saline soils influenced by the soda industry. To address this knowledge gap, our research focused on assessing the microbiota in relation to soil properties and plant species composition across two transects representing different types of land use: saline wasteland and arable fields. Our findings show that the microbial communities were the most affected not only by soil salinity but also by pH and the composition of plant species. Taxonomic variability was the most shaped by salinity together with management type and CaCO content. The impact of salinity on the soil microbiome was manifested in a reduced abundance of bacteria and fungi, a lower number of observed phylotypes, reduced modularity, and a lower abundance of the nitrifying guild. Denitrification and nitrogen fixation were less affected by salinity. The last process was correlated with calcium carbonate. CaCO was also associated with microbial taxonomic variability and the overall microbial activity caused by hydrolases, which could aid organic matter turnover in saline but carbonate-rich sites. Bacterial genera such as Bacillus, Peanibacillus, and Rhodomicrobium, in addition to fungal taxa such as Cadophora, Mortierella globalpina, Preussia flanaganii, and Chrysosporium pseudomerdarium, show potential as favourable candidates for possible bioremediation initiatives. These results can be applied to future land reclamation projects. FUNDING INFORMATION: This research received no specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
工业区域退化土地中微生物组的作用非常重要。然而,人们对于环境参数如何影响微生物丰度、结构、多样性,尤其是受苏打产业影响的盐土中参与氮循环的特定类群,知之甚少。为了填补这一知识空白,我们的研究重点是评估与土壤特性和植物物种组成相关的微生物群,跨越两个代表不同土地利用类型的样带:盐荒地和耕地。我们的研究结果表明,微生物群落不仅受到土壤盐分的影响,还受到 pH 值和植物物种组成的影响。分类学变异性主要受到盐分、管理类型和 CaCO3 含量的影响。盐度对土壤微生物组的影响表现为细菌和真菌丰度降低,观察到的类群数量减少,模块性降低,硝化类群丰度降低。反硝化和固氮过程受盐度影响较小。最后一个过程与碳酸钙有关。CaCO3 还与微生物分类学变异性和水解酶引起的整体微生物活性有关,这有助于在盐度但富含碳酸盐的地点进行有机质转化。芽孢杆菌属、皮恩氏菌属和红微菌属等细菌属,以及拟青霉属、聚多曲霉属、普雷西亚弗拉纳根菌属和假金孢子菌属等真菌属,可能是可能的生物修复计划的有利候选物。这些结果可应用于未来的土地复垦项目。