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In the 0�C10?cm soil depth concentrations of Bray #1 and Bray #2 P in SGG soils were around twice those in G soils and in SGS soils were twice again those in SGG soils. Labile carbon (K2SO4 extractable) concentrations in soils from the two snow gum vegetation types were similar, and around twice those in G soils. As might be expected, microbial biomass C followed a strongly biophilic (meaning similar to the distribution of biological activity; Attiwill & Leeper, 1987) distribution with depth in all vegetation types. Concentrations were notably greater in the surface horizons under the G and SGG, although no significant difference in microbial biomass at each depth was detected. Rates of respiration increased with temperature across all vegetation http://www.selleck.cn/products/lee011.html types (Fig. 3), from 5?��C (278?K) to 40?��C (313?K). At 40?��C, soils from SGS produced CO2 at rates roughly similar to those recorded for soils from SGG but at more than twice the rate recorded for soils from G sites; a clear example of the effect of vegetation type on soil respiration. Relationships between soil respiration and temperature were closely approximated by both Arrhenius and exponential functions (Table 2). All fitted regressions were highly significant (P http://www.selleckchem.com/products/i-bet-762.html rates of respiration in surface soils from SGG and G communities were 3.5 times greater in the top 10?cm than at 30�C50?cm soil depth. In the SGS community, the equivalent ratio was 2.3. There were strong relationships between respiration and temperature for all soil depths, all r2 values were >0.94 (P http://www.selleckchem.com/products/epacadostat-incb024360.html (r2=0.904, P