| Abstrakt: |
Shrub-lands composed of patches (PATs) and inter-patch open spaces (IPOSs) and a detailed study of their spatial carbon stock (CS) provides comprehensive information for the correct calculation of global C. Here, CS was studied in pure shrub-lands, including Artemisia sieberi, Scariola orientalisand Astragalus gossypinustypes in central arid lands of Iran. Soil physicochemical and shrubs morphological characteristic were also investigated and data were modeled using a linear dimensionality reduction technique. Findings disclosed that CS was spatially heterogeneous across PATs and IPOSs (P< 0.01). The amount of soil CS at 0–30 cm decreased from 805.5 kg.ha−1to 176.0 kg.ha−1from PATs to IPOSs, respectively. The most change (316.0%) of soil CS from the PATs to IPOSs was observed in A. gossypinustype. Spearman correlation through polynomial analysis showed that litter, aboveground biomass, belowground biomass, EC, soil moisture and distance from the shrub stand (r = 0.904, 0.613, 0.854, 0.814, 0.849 and 0.926, respectively), had a significant relationship with the spatial distribution of soil CS through IPOSs (P< 0.01). These data can be considered for future studies on potential factors or specific variables influencing the calculation of CS in vast areas with sparse vegetation. |
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