public read Forest Ecosystem Monitoring Cooperative

705 Spear StreetSouth BurlingtonVermont05403United States of America

(802) 656-0683femc@uvm.eduwww.uvm.edu/femcNortheastern States Research Cooperative funderUniversity of Vermont Plant and Soil ScienceleadData from 14 of the 18 sites on the fractionation of soil into three aggregate categories and the amount of protected carbon within each category. Also included are earthworm numbers, both total and by ecotype. A separate dataset will have earthworm counts by species. Each site had six subplots that were sampled in three increments: the Oi and Oe horizons, 0-10 cm below the Oe, and 10-20 cm below the Oe. Soil aggregate analysis was done on the mineral soil below the Oe, i.e. the Oa was not included.Forest Ecosystem Monitoring CooperativeJulietteJuilleratcontentProviderSandraWilmotprincipalInvestigatorNancyBurtcontentProviderCharlieCogbillcontentProviderThomasVillarscontentProviderDonaldRossprincipalInvestigatorDavidBrynncontentProviderCarolineAlvescontentProviderMeghan KnowlescontentProviderJeff BriggscontentProviderLisa ThortoncontentProviderJosef³Òö°ù°ù±ð²õcontentProviderOngoing forest soil monitoring is essential for understanding the impact of human activities. With funding from the Northern States Research Cooperative, we established 18 plots in Vermont's managed forests. Most are located in federal, state and town forests, parks and management areas. The initial primary focus was on soil carbon, which serves as a major reservoir for carbon storage in forests. Initial soil sampling was done in 2008/2009, along with measurement of aboveground biomass. In 2012/2013 we resampled to determine earthworm numbers and species, and also performed a detailed land-use history of each site. In addition, four sites were resampled to assess the impact of partial harvesting on carbon in the forest floor. We hope that these plots will continue to provide a good baseline for future work.Soil aggregate data by plotData from 14 of the 18 sites on the fractionation of soil into three aggregate categories and the amount of protected carbon within each category. Also included are earthworm numbers, both total and by ecotype. A separate dataset will have earthworm counts by species. Each site had six subplots that were sampled in three increments: the Oi and Oe horizons, 0-10 cm below the Oe, and 10-20 cm below the Oe. Soil aggregate analysis was done on the mineral soil below the Oe, i.e. the Oa was not included.VMC.1158.3932mySQL/femc/data/archive/project/Soil_Carbon_Monitoring/dataset/soil-aggregate-data-by-plot2012-04-292024-01-30Site Abbreviation for siteThree letter abbreviation used for each sitetextPlot_location_(degrees)Plot location (degrees)Location of the subplot from the plot center in degrees magnetic northtextDepth_(cm)Soil sampling depth (cm)Depth below the Oe horizon for soil sample taken. Subplot dimensions were 50 x 50 cmtextWorms_per_m2Number of earthworms per square meterCount of individual earthworms in the subplot layer expressed on a per square meter basisdecimalendogeic/m2Number of endogeic earthworms per square meterCount of individual endogeic earthworms in the subplot layer expressed on a per square meter basisdecimalepigeic/m2Number of epigeic earthworms per square meterCount of individual epigeic earthworms in the subplot layer expressed on a per square meter basisdecimalepi-endo_anecic/m2Number of epi-endogeic and anecic earthworms per square meterCount of individual epi-endogeic and anecic earthworms in the subplot layer expressed on a per square meter basisdecimalNumber_of_speciesNumber of unique earthworm speciesNumber of unique earthworm species in the subplot layerdecimalbulk_soil_N_(g/kg)Total soil nitrogen (g/kg)Total nitrogen in the soil layer by elemental analyzerdecimalbulk_soil_C_(g/kg)Total soil organic carbon (g/kg)Total organic carbon in the soil layer by elemental analyzerdecimalbulk_soil_C/N_ratioBulk soil carbon to nitrogen ratio Ratio of total organic carbon to total nitrogen in the soil layer, by elemental analyzerdecimalfmA_total_C_(g/kg)Free microaggregate and free light fraction carbonCarbon in the 'free' (not within macroaggegates) microaggregates (53-250 micron diameter) and the associated light fraction (before separation)decimalfmA_LF_C_(g/kg)Carbon in the light fraction separated with the free microaggregatesCarbon in the light fraction of organic matter associated with, but not entrained in, the 'free' (not within macroaggegates) microaggregates (53-250 micron diameter)decimalfmA_prot(g/kg)Carbon protected within the free microaggregatesCarbon entrained in the 'free' (not within macroaggegates) microaggregates (53-250 micron diameter), calculated by subtraction of the light fraction carbon from the fmA_total carbondecimalmAlg_total_C_(g/kg)Large macroaggregate (>2 mm) total carbonCarbon in the large macroaggregate (>2 mm) fraction, including carbon within entrained microaggregates and the light fraction of organic matterdecimalmAlg_LF_C_(g/kg)Large macroaggregate (>2 mm) light fraction carbonCarbon in the large macroaggregates (>2 mm) from the inter-microaggregate light fraction of organic matterdecimalmAlg_prot_(g/kg)Large macroaggregate (>2 mm) protected carbonProtected carbon in the large macroaggregates (>2 mm), i.e. that contained within the entrained microaggregates. Calculated by subtracting the large macroaggregate light fraction carbon from the large macroaggregate'total' carbondecimalmAsm_total_C_(g/kg)Small macroaggregate (0.25-2.0 mm) total carbonCarbon in the small macroaggregate (0.25-2.0 mm) fraction, including carbon within entrained microaggregates and the light fraction of organic matterdecimalmAsm_LF_C_(g/kg)Small macroaggregate (0.25-2.0 mm) light fraction carbonCarbon in the small macroaggregates (0.25-2.0 mm) from the inter-microaggregate light fraction of organic matterdecimalmAsm_prot_(g/kg)Small macroaggregate (0.25-2.0 mm) protected carbonProtected carbon in the small macroaggregates (0.25-2.0 mm), i.e. that contained within the entrained microaggregates. Calculated by subtracting the large macroaggregate light fraction carbon from the large macroaggregate'total' carbondecimalSum_of_protected_C_(g/kg)Sum of protected carbon contained in all microaggregatesSum of free microaggregate protected carbon and microaggregate protected carbon entrained in both small and large macroaggregatesdecimalFraction_protectedThe fraction of total carbon that is protectedCalculated by dividing the sum of protected carbon by the bulk soil carbondecimalFraction_of_soil_lgMAThe fraction of total soil weight that is comprised of large macroaggregates (>2 mm)Calculated by dividing the dry weight of the separated large macroaggregates (>2 mm) by the dry weight of the soil sample analyzed. These data are not shown.decimalFraction_of_soil_mAlgThe fraction of total soil weight that is comprised of microaggregates within large macroaggregatesCalculated by dividing the dry weight of the microaggregates separated from the large macroaggregates (>2 mm) by the dry weight of the soil sample analyzed. These data are not shown.decimalFraction_of_soil_smMAThe fraction of total soil weight that is comprised of small macroaggregates (0.25-2.0 mm)Calculated by dividing the dry weight of small macroaggregates (0.25-2.0 mm) by the dry weight of the soil sample analyzed. These data are not shown.decimalFraction_of_soil_mAsmThe fraction of total soil weight that is comprised of microaggregates within small macroaggregatesCalculated by dividing the dry weight of microaggregates separated from the small macroaggregates (0.25-2.0 mm) by the dry weight of the soil sample analyzed. These data are not shown.decimalFraction_of_soil_fmAThe fraction of total soil weight that is comprised of free microaggregatesCalculated by dividing the dry weight of free microaggregates (0.053-0.25 mm) by the dry weight of the soil sample analyzed. These data are not shown.decimalFraction_of_all_mAThe fraction of total soil weight that is comprised of all microaggregatesCalculated by dividing the sum of the dry weight of all microaggregates (free and entrained in macroaggregates) by the dry weight of the soil sample analyzed. These data are not shown.decimalFraction_of_all_MAThe fraction of total soil weight that is comprised of all macroaggregatesCalculated by dividing the sum of the dry weight of small and large macroaggregates by the dry weight of the soil sample analyzed. These data are not shown.decimal