Spatial pattern of soil carbon and nutrient storage at the alpine tundra ecosystem of Changbai Mountain, China

Abstract

In August 2003, we investigated spatial pattern in soil carbon and nutrients in the Alpine tundra of Changbai Mountain, Jilin Province, China. The analytical results showed that the soil C concentrations at different depths were significantly (p<0.05) higher in Meadow alpine tundra vegetation than that in other vegetation types; the soil C (including inorganic carbon) concentrations at layer below 10 cm are significantly (p<0.05) higher than at layer of 10–20 cm among the different vegetation types; the spatial distribution of soil N concentration at top surface of 0–10 cm depth was similar to that at 10–20 cm; the soil P concentrations at different depths were significantly (p<0.05) lower at Lithic alpine tundra vegetation than that at other vegetation types; soil K concentration was significantly (p<0.05) higher in Felsenmeer alpine tundra vegetation and Lithic alpine tundra vegetation than that in Typical alpine tundra, Meadow alpine tundra, and Swamp alpine tundra vegetations. However, the soil K had not significant change at different soil depths of each vegetation type. Soil S concentration was dramatically higher in Meadow alpine tundra vegetation than that in other vegetation types. For each vegetation type, the ratios of C: N, C: P, C: K and C: S generally decreased with soil depth. The ratio of C: N was significantly higher at 0–10 cm than that at 10–20 cm for all vegetation types except at the top layer of the Swamp alpine tundra vegetation. Our study showed that soil C and nutrients storage were significantly spatial heterogeneity.

Keywords

Soil carbon storage / Soil nutrients / Alpine tundra ecosystem / Vegetation type / Changbai Mountain

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