ArticleScientific reports2025
Influence of highway construction of alpine grassland area in Gannan on soil properties and microbiota.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
In order to explore microorganisms which may utilized in soil rehabilitation and vegetation restoration, the present study evaluated the impacts of highway construction on soil chemical properties and microbiota and their interaction based on highway construction area in Gannan on the Qinghai-Tibet Plateau. Soil samples were collected from highway construction area of Zhuoni-Hezuo highway including two representative locations at different distances and abandoned black and yellow soils in June and September. The properties of these collected soil samples, including the contents of nitrogen, phosphorus, potassium, microbial biomass carbon, pH value, enzyme activity and microbiota were analyzed. A total of 26 phyla, including 369 genera of bacteria, and 14 phyla, including 307 genera of fungi, were identified in all soil samples. Only sampling time had a great impact on the soil, as the values of most of the tested soil chemical indices and microbial α-diversity indices in September were significantly higher than in June (P < 0.05). However, the fungal ACE index in September was significantly lower than that in June (P < 0.05). There was no significant difference between the two distances within a single location or the two locations at the same distance, except for a few indices in September. The nutrient contents of the black soil were significantly higher than those of the yellow soil (P < 0.05), although both were significantly lower than those of the soil from plant-growing areas (P < 0.05). The soil chemical properties had a significant correlation with most of the bacterial α-diversity indices, which revealed the interaction between soil properties and microbiota. Specifically, Sphingomonas and Acaromyces et al. were recognized as biomarkers after LEfSe analysis. The soil total nitrogen content significantly affected plant fresh weight and the bacterial community, which was also the main factor affecting the biomarkers. These results were consistent with vegetation growth, suggesting that soil away from the red line of the highway construction had its own adaptation mechanisms; however, highway construction destroyed and affected the surrounding natural environment. Improved understanding of the impacts of highway construction on ecology will be critical in building decision support tools to help improve the ecosystem.
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