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KMID : 0380119990220040205
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Korean Journal of Ecology
1999 Volume.22 No. 4 p.205 ~ p.210
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Spatial Heterogeneity of Soil K, Ca, Mg, Fe and Al Generated by Leaf Litter Redistribution in a Temperate Hardwood Forest
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Oh, Sung Jin
Yoo, Ga Young/Shim, Ji Hyun/Kang, Sin Kyu/Lee, Do Won
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Abstract
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A Korean temperate hardwood forest dominated by Quercus mongolica, Acer pseudo-sieboldianum, and Carpinus cordata is divided into three types of patches at the ground level, created by aspect and understory vegetation. Two patches are located on a southwest-facing slope, with understory dominated by herbaceous plants (Patch S) and evergreen dwarf bamboos, Sasa borealis (Patch SS), respectively. The other is on the opposite slope with understory dominated by various herbaceous plants (Patch N). The objective of this study was to examine the effects of leaf litter redistribution on soil metals in the patches and the ridge that was located on the boundary of the two slopes. In general, the amounts of leaf litter stores increased in the order of Patch S, SS and N, suggesting that leaf litter moved from Patch S to Patch SS and N and that dwarf bamboo contributed to litter retention on the southwest-facing slope. In both O and A horizon soils, the concentration of Ca was higher in Patch N than in Patch S and SS, and the ridge, while those of other metals showed the opposite tendency. The concentration of Ca was also higher in O horizon soils than in A horizon soils for all the patches, while those of the other metals were reverse. In A horizon soils, the concentration of Ca was lowest in Patch S, and those of K, Fe, and Al were lowest in the ridge. Although it was not statistically significant, the concentration of Ca in soil was positively correlated with leaf litter store, but those of K, Fe, Mg, and Al negatively, suggesting that leaching loss of K, Fe, Mg, and Al is enhanced by the processing of leaf litter. Available N and activities of arylsulphatase and phosphatase were negatively correlated with concentration of Al (p ＜ 0.05). In conclusion, redistribution of leaf litter is largely governed by topography and understory in the hardwood forest floor, and influences spatial heterogeneity of biogeochemical processes in the forest ecosystem.
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