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- W224717410 abstract "I assessed microbial community composition as a function of altered aboveand belowground C inputs to soil in forest ecosystems of Oregon, Pennsylvania, and Hungary as part of a larger Detritus Input and Removal Treatment (DIRT) experiment. DIRT plots, which include root trenching, aboveground litter exclusion, and doubling of litter inputs, have been established in forested ecosystems in the US and Europe that vary with respect to dominant tree species, C background, N deposition rate, and soil type. These treatments provide a unique opportunity to study the feedbacks and processes controlling soil organic matter (SOM) transformations. This study used phospholipid fatty-acid (PLFA) analysis to examine changes in the soil microbial community size and composition in the mineral soil (0-10 cm) as a result of the DIRT treatments. At all sites the PLFA profiles from the plots without roots were significantly different than all other treatments, even after accounting for the loss of mycorrhizal fungi after root trenching. PLFA analysis showed that the rootless plots generally had larger quantities of actinomycete biomarkers and lower amounts of fungal biomarkers. At one of the sites, in an old-growth coniferous forest, seasonal changes in PLFA profiles were also examined. Seasonal differences in soil microbial community composition were greater than treatment differences. Throughout the year, treatments without roots continued to have a different microbial community composition than the treatments with roots, although the specific PLFA biomarkers responsible for these differences varied by season. These data provide direct evidence that root C inputs control microbial community composition in forest soils." @default.
- W224717410 created "2016-06-24" @default.
- W224717410 creator A5030807584 @default.
- W224717410 date "2005-03-10" @default.
- W224717410 modified "2023-09-28" @default.
- W224717410 title "Litter controls of microbial community composition and function in forest soils" @default.
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