Publication Date:
2023-10-28
Description:
Fieldwork took place in February and March in 2011 and 2012. Sampling was conducted on 50-50m plots established at each of the 60 Kili studied sites (12 ecosystems x 5 transects). Surface litter and mineral topsoil (0–5 cm) were sampled at five locations at each plot. Additionally, fresh mature leaves of the five most abundant plant species covering 80% of total plant biomass per site were collected. All sampled materials (leaves, litter, and soil) were air-dried until constant weight, and leaf material was subsequently ovendried at 70 °C for 60 h prior to grinding. Soil was sieved to 2mm with visible root fragments being further removed prior to grinding with a mixer mill (MM200, Retsch, Haan Germany). Soil pH was determined with a pH meter (MultiCal SenTix61,WTW,Weilheim, Germany) in a 0.01MCaCl2 solution, with a CaCl2-to-soil ratio of 2 V 1. Particle size distribution was determined gravimetrically using the pipette method (van Reeuwijk, 2002). All soil, litter, and leaf samples were analysed with a dry combustion elemental analyser (Costech International S.p.A., Milano, Italy) fitted with a zero-blank autosampler coupled to a ThermoFinnigan DeltaPlus XL using continuous-flow isotope ratio mass spectrometry (CF-IRMS) for the determination of the abundance of elemental C and N and their stable isotopic composition (d13C, d15N). Precisions (standard deviations) on internal standards for elemental C and N concentrations and stable isotopic compositions were better than 0.08% and 0.2 ‰, respectively.
Keywords:
DEPTH, soil; Depth, soil, maximum; Depth, soil, minimum; Event label; IRMS; Isotope ratio mass spectrometer; KiLi; KiLi_cof1; KiLi_cof2; KiLi_cof3; KiLi_cof4; KiLi_cof5; KiLi_fer0; KiLi_fer1; KiLi_fer2; KiLi_fer3; KiLi_fer4; KiLi_flm1; KiLi_flm2; KiLi_flm3; KiLi_flm4; KiLi_flm6; KiLi_foc1; KiLi_foc2; KiLi_foc3; KiLi_foc4; KiLi_foc5; KiLi_fod1; KiLi_fod2; KiLi_fod3; KiLi_fod4; KiLi_fod5; KiLi_fpd1; KiLi_fpd2; KiLi_fpd3; KiLi_fpd4; KiLi_fpd5; KiLi_fpo1; KiLi_fpo2; KiLi_fpo3; KiLi_fpo4; KiLi_fpo5; KiLi_gra1; KiLi_gra2; KiLi_gra3; KiLi_gra4; KiLi_gra5; KiLi_hel1; KiLi_hel2; KiLi_hel3; KiLi_hel4; KiLi_hel5; KiLi_hom1; KiLi_hom2; KiLi_hom3; KiLi_hom4; KiLi_hom5; KiLi_mai1; KiLi_mai2; KiLi_mai3; KiLi_mai4; KiLi_mai5; KiLi_sav1; KiLi_sav2; KiLi_sav3; KiLi_sav4; KiLi_sav5; Kilimanjaro; Kilimanjaro Research Group; Layer description; Mount Kilimanjaro, Tanzania; Nitrogen, standard error; Nitrogen, total; Organic carbon, soil; Plot; see sample method; δ12C/13C ratio; δ12C/13C ratio, standard error; δ15N/14N ratio; δ15N/14N ratio, standard error
Type:
Dataset
Format:
text/tab-separated-values, 1320 data points
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