金佛山方竹经营对扁刺栲群落物种多样性和优势种种群结构的影响

Subjects: Biology >> Botany >> Applied botany submitted time 2021-07-20 Cooperative journals: 《广西植物》

王静梅 周礼华 黄力 胡四维 靳程 杨永川

Abstract： To explore the impact of Chimonobambusa utilis management on species diversity and dominant populations structure of Castanopsis platyacantha community in Jinfo Mountain, the natural and the managed community of Castanopsis platyacantha in Jinfo Mountain were used as the research object to analyze species composition characteristics, species diversity and dominant populations structure in two communities. The results were as follows: (1) A total of 84 vascular plants in the plots were found, belonging to 40 families and 63 genera, dominated by Lauraceae, Rosaceae, Fagaceae and Theaceae; Castanopsis platyacantha was the dominant species in the community, Schima sinensis and Lithocarpus henryi were the subordinates and Chimonobambusa utilis was the dominant species in the shrub layer, which the species composition of Castanopsis platyacantha community in Jinfo Mountain was similar to other subtropical regions. (2) The species richness of the shrub layer of the managed community was significantly lower than that of the natural community, the Shannon-wiener index and Pielou index of the herb layer was significantly lower than that of the natural community. (3) Dominant tree species Castanopsis platyacantha and Lithocarpus henryi in the natural community were of stable populations, but those were of declining populations in the managed community, and Schima sinensis in two communities appeared to be in decline. (4) The ratio of total sprouts to total individuals, number of multi-stemmed individuals/number of all individuals and seedling relative dominance value of Castanopsis platyacantha, Schima sinensis and Lithocarpus henryi in the natural community were higher than in the management community. In conclusion, the Chimonobambusa utilis management have a negative impact on the species diversity with the strongest on the shrub and herb layers of Castanopsis platyacantha community in Jinfo Mountain, indicating managed activities significantly affect the renewal and maintenance of the dominant species in Castanopsis platyacantha community.

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