Abstract: The investigation on the ecological characteristics of natural and artificial plant communities in Kunyu Mountain showed that the species number, species dominance, and dominant species in both shrub and herbage layers differed with vegetation type. There was a strong correlation among the indices characterizing the community ecological characteristics, of which, Shannon-Wiener (H) index had the closest correlation to others. The comparison of the species diversity in different layers with H value as an indicator indicated that the relations between the species diversity of shrub and herbage layers varied with vegetation type, but the average H value tended to be stable, suggesting that there was an inter-complementary relationship between the shrub and herbage layers species diversity. Owing to the heterogeneity of the environment, different communities belonging to the same vegetation type always had different species diversity. The species diversity of shrub layer and herbage layer was in the order of shaw>P. densiflora forest>P. thunbergii forest>Quercus acutissima forest when the plant communities were natural or less managed, but P. thunbergii forest>P. densiflora forest>shaw>Q. acutissima forest after the P. densiflora and P. thunbergii forests were managed. The growth of arbor layer was inhibited in P. thunbergii and P. densiflora forests, which was in accordance with the theory of “moderate disturbance”. In general, the management of P. densiflora forest achieved moderate disturbance level, while that of P. thunbergii forest was excessive.

Key words: Acid rain, Eggplant, Tetranychus cinnabarinus, Physiological and biochemical characters, Nutrient