Quantitative Classification and Ordination of Vegetations in Tongguling National Nature Reserve, Hainan

doi:10.11924/j.issn.1000-6850.2014-0305

Abstract

Abstract: In order to scientifically distinguish the vegetation types of formation in Wenchang Tongguling National Nature Reserve, Hainan Island and understand the relationship between community characteristics and environmental factors, the author analyzed it through comprehensive random sampling in the protection zone with a total number of 64 sample plots (the total area sampled: 2.11 hm2), using PC-ORD5.0 for TWINSPAN classification, using CANOCO 4.5 software for DCA and CCA ordination. The results showed: (1) 64 samples of Tongguling Nature Reserve were divided into 11 formations by using TWINSPAN and DCA, under 3 kinds of vegetation types: coastal thickets, foothills shrubs, tropical evergreen monsoon elfin forest; (2) 64 sample plots in DCA sorting first axis showed the change of moisture gradient, and no obvious environment significance in the second shaft rendering, indicating that the moisture factor played a decisive for the formation and distribution of vegetation types reserve; (3) elevation of Tongguling was not high, and the highest peak was only 338 m. However, CCA results showed that contribution, for the ordering from greatest to smallest was altitude, gradient and slope direction. The result that the first axis and the maximum altitude relevance, the second sort shaft and slope had great relevance, fully demonstrated the particularity of the coastal bedrock coast environment and that of the distribution of forest vegetation.

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