کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10846115 1070002 2010 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microbial community structure in restored riparian soils of the Canadian prairie pothole region
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش خاک شناسی
پیش نمایش صفحه اول مقاله
Microbial community structure in restored riparian soils of the Canadian prairie pothole region
چکیده انگلیسی
In the Prairie Pothole Region (PPR) of Canada, wetlands once utilized for agricultural purposes are restored through the placement of a ditch plug to return them to their pre-existing hydrological state. The overall objective of this research was to assess differences in riparian soil microbial community structure between reference wetlands, those which had never been utilized for agricultural purposes, and restored wetlands, of varying times since restoration. Soil samples (0-6 cm) were taken from 15 reference and 28 restored wetlands. The soil microbial community was characterized using phospholipid fatty acid (PLFA) analysis. Data were analyzed using non-metric multidimensional scaling, multivariate regression trees (MRT) and indicator species analysis. The microbial community of younger restored soils (1-3 and 4-6 yrs) differed significantly from the reference soils, with reference soils having higher microbial biomass, evenness, and diversity. Richness showed an increasing trend with time since restoration. Results from the MRT underlined the importance of climatic factors, specifically precipitation - potential evapotranspiration (P-PE) in explaining the variation found in the microbial community. More specifically, drier sites had strong indicator species values associated with PLFAs of actinomycetal origin and fungal origin. Within the wetter sites, it was found that the older restored sites (7-11 yrs) and reference sites had strong indicator species values associated with PLFAs of Gram negative and fungal origin. The similarities in microbial community composition and biomass of the older restored sites (7-11 yrs) and the reference sites indicate that this component of the wetland ecosystems begins to recover within this time period.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Soil Biology and Biochemistry - Volume 42, Issue 9, September 2010, Pages 1463-1471
نویسندگان
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