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Linking soil nutrient cycling and microbial community with vegetation cover in riparian zone
Geoderma ( IF 6.1 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.geoderma.2020.114801
Manyun Zhang , Patrick J. O'Connor , Jinyu Zhang , Xiaoxin Ye

Abstract The riparian zone is a spatially fluctuating ecotone between terrestrial and aquatic ecosystems and has key ecological functions, due to specific geographic conditions and seasonal environmental changes. The comprehensive functions of vegetation cover and microbial community in riparian zones might generate positive consequences for nutrient cycling. In this study, four different vegetation-covered soils in a riparian zone on the Yangtze River was selected. Soil nutrient concentration and microbial properties, including nitrogen (N) and phosphorus (P) cycling and microbial community structure, were analyzed, and the relationships among soil nutrient concentrations, microbial properties and vegetation covers were also linked. Vegetation covers increased soil NH4+-N supply by enhancing N mineralization and positively affected available N retention through inhibition of soil nitrification. Plant species outweighed plant biomass in determining soil microbial properties related to P mineralization, including phosphatase activities and functional gene abundances. Vegetation covers significantly increased Acidobacteria and Mortierellomycota relative abundances. Soil bacterial and fungal communities had opposing responses to the impacts of plant species richness and biomass. In the riparian zone, plant species outweighed plant biomass in promoting soil N and P mineralization, and vegetation covers, regardless of plant species, improved available nutrient supplies and retentions and shaped soil microbial community.

中文翻译:

将土壤养分循环和微生物群落与河岸带植被覆盖联系起来

摘要 河岸带是陆地和水生生态系统之间空间波动的交错带,由于特定的地理条件和季节环境变化,具有重要的生态功能。河岸带植被覆盖和微生物群落的综合功能可能对养分循环产生积极影响。本研究选择了长江沿岸地区四种不同植被覆盖的土壤。分析了土壤养分浓度和微生物特性,包括氮(N)和磷(P)循环和微生物群落结构,并将土壤养分浓度、微生物特性和植被覆盖之间的关系联系起来。植被通过增强 N 矿化作用来增加土壤 NH4+-N 的供应,并通过抑制土壤硝化作用对有效 N 保留产生积极影响。在确定与磷矿化相关的土壤微生物特性(包括磷酸酶活性和功能基因丰度)方面,植物物种的重要性超过了植物生物量。植被覆盖显着增加的酸杆菌和被孢霉的相对丰度。土壤细菌和真菌群落对植物物种丰富度和生物量的影响有相反的反应。在河岸带,植物物种在促进土壤 N 和 P 矿化方面的作用超过植物生物量,无论植物物种如何,植被覆盖都改善了可用养分供应和保留,并塑造了土壤微生物群落。在确定与磷矿化相关的土壤微生物特性(包括磷酸酶活性和功能基因丰度)方面,植物物种的重要性超过了植物生物量。植被覆盖显着增加的酸杆菌和被孢霉的相对丰度。土壤细菌和真菌群落对植物物种丰富度和生物量的影响有相反的反应。在河岸带,植物物种在促进土壤 N 和 P 矿化方面的作用超过植物生物量,无论植物物种如何,植被覆盖都改善了可用的养分供应和保留,并塑造了土壤微生物群落。在确定与磷矿化相关的土壤微生物特性(包括磷酸酶活性和功能基因丰度)方面,植物物种的重要性超过了植物生物量。植被覆盖显着增加的酸杆菌和被孢霉的相对丰度。土壤细菌和真菌群落对植物物种丰富度和生物量的影响有相反的反应。在河岸带,植物物种在促进土壤 N 和 P 矿化方面的作用超过植物生物量,无论植物物种如何,植被覆盖都改善了可用养分供应和保留,并塑造了土壤微生物群落。植被覆盖显着增加的酸杆菌和被孢霉的相对丰度。土壤细菌和真菌群落对植物物种丰富度和生物量的影响有相反的反应。在河岸带,植物物种在促进土壤 N 和 P 矿化方面的作用超过植物生物量,无论植物物种如何,植被覆盖都改善了可用养分供应和保留,并塑造了土壤微生物群落。植被覆盖显着增加的酸杆菌和被孢霉的相对丰度。土壤细菌和真菌群落对植物物种丰富度和生物量的影响有相反的反应。在河岸带,植物物种在促进土壤 N 和 P 矿化方面的作用超过植物生物量,无论植物物种如何,植被覆盖都改善了可用养分供应和保留,并塑造了土壤微生物群落。
更新日期:2021-02-01
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