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RELATIONSHIP BETWEEN PLANT SPECIES DIVERSITY AND SOIL EROSION ON DIFFERENT SECONDARY SUCCESSION PHASES OF A SEMI-HUMID EVERGREEN BROAD-LEAVED FOREST

The different secondary succession phases of semi-humid evergreen broad-leaved forests covering different species diversity were chosen to study relationship between plant species diversity and canopy interception, soil erosion, surface runoff and phosphorus erosion at runoff plot scales. The conclusions indicated that plant diversity resulted in hygroscopic water increase and improved the canopy hydrological effect of plant communities and that plant diversity acted on surface runoff and soil erosion control depending on the improvement of canopy interception, soil penetrability and erosion resistance. Plant diversity was also able to reduce the risk of phosphorus releases in runoff. So, plant diversity was verified indirectly to improve ecosystem productivity, sustainability and stability. Additional Keywords: plant species diversity, canopy interception, runoff, soil and total phosphorus