Soil Microbial Community Recovery in Reclaimed Soils on a Surface Coal Mine Site

被引:134
作者
Dangi, Sadikshya R. [1 ,2 ]
Stahl, Peter D. [3 ]
Wick, Abbey F. [4 ]
Ingram, Lachlan J. [5 ]
Buyer, Jeffrey S. [6 ]
机构
[1] USDA ARS, Parlier, CA 93648 USA
[2] Univ Calif Davis, Salinas, CA 93905 USA
[3] Univ Wyoming, Dep Renewable Resources, Laramie, WY 82071 USA
[4] Virginia Polytech Inst & State Univ, Dep Crop & Soil Environm Sci, Blacksburg, VA 24061 USA
[5] Univ Sydney, Fac Agr Food & Nat Resources, Cobbity, NSW 2570, Australia
[6] USDA ARS, Sustainable Agr Syst Lab, Beltsville, MD 20705 USA
关键词
ARBUSCULAR MYCORRHIZAL FUNGI; ORGANIC-MATTER; TOPSOIL; BIOMASS; RECLAMATION; WHEATGRASS; DIVERSITY; AGGREGATE; INDICATOR; STORAGE;
D O I
10.2136/sssaj2011.0288
中图分类号
S15 [土壤学];
学科分类号
090301 [土壤学];
摘要
Recovery of belowground microbial community structure is important for reclamation success. In this study, the recovery of soil microbial community structure in cool-season grass dominated and sagebrush dominated reclaimed sites were examined using chronosequences ranging in time following reclamation from < 1 to 26 yr. Phospholipid fatty acid (PLFA) analysis was used to characterize changes in microbial community structure with time. Initial effects of surface mining resulted in reductions of total microbial biomass and diversity, with the greatest influence on saprophytic fungi and arbuscular mycorrhizal fungi relative to undisturbed soils. The total concentration of PLFA biomarkers increased after 14 yr in soils established under cool-season grass communities and 5 yr in soils colonized by sagebrush communities. Canonical multivariate analysis of variance indicated that soil microbial communities under reestablished sagebrush were more similar to one another than those under cool-season grasses. In general, microbial biomarkers of reclaimed soils recovered to predisturbance levels within 5 to 14 yr, which indicated that the most important phase of microbial community recovery occurs between 5 and 14 yr after reclamation.
引用
收藏
页码:915 / 924
页数:10
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