Biodiversity Restoration of Severely Degraded Ecosystem After Closed Hillside and Management in Eroded Red Soil of Subtropic

The ecosystem degraded severely owing to serious soil erosion on the red soil developed from granite in the southern China, and to restore and reconstruct the ecosystem with good function is a task that is very urgent at present. The study on the recovering of plant species diversity based on the vegetation investigation of communities of the eroded land (serious degraded ecosystem), Masson pine forest restored by closed hillside and management,and the native forest (forest in the location of a house or tomb) remnant aside the village. The results showed that the category of vegetation and the amount of vegetation were rare, the flora was simple, the various indexes of biodiversity were the lowest in the serious degraded ecosystem; after the ecosystem recovered by closed hillside and management, the vegetation cover recovered, plant category increased, the flora was to the complication and the biodiversity index enlarges; the species of the native forest was the richest, the flora comparatively complicated, the biodiversity index was the most. Therefore, the degraded ecosystem recovered after closed hillside and management measure,and the biodiversity of ecosystem recovered to a great extent,but there was still a big gap compared with the native forest.