Study on Geographical Distribution and Distribution Characteristics of Cyatheaceae in Hainan Island
In order to master the distribution characteristics and protection status of Cyatheaceae resources in Hainan,a general investigation of wild Cyatheaceae was conducted in Hainan Island by using spot and sample survey.Method of variance to mean ratio was used in the analysis of Cyatheaceae population distri-bution pattern.One-way ANOVA was used to explore the protective effects of sample sites under different protection status.The results showed that:1)In Hainan Island,there are five native Cyatheaceae species, which were classified into two genera,including Alsophila latebrosa,Alsophila spinulosa,Alsophila gigant-ea,Alsophila podophylla and Sphaeropteris brunoniana.2)In Hainan Island,Cyatheaceae are mainly found in central and southern mountain area such as Wuzhishan City,Qiongzhong County,Lingshui County and Baisha County,mainly distributed in tropical rainforests with a medium and high elevation range of 400~1 000m,a gentle shady slope range,and a medium and higher canopy density range of 40%~80%,form-ing clusters in moist biotopes such as understory,valleys and riverside,sometimes scattering in shrubs of forest edge.3)Population densities of five Cyatheaceae are quite different,and the spatial distribution patterns of five Cyatheaceae populations are all clustered.4)Compared with outside of natural reserves, species diversity and population density of Cyatheaceae have increased in natural reserves,indicating that reducing human interference has certain effect on the protection of species diversity and the recovery of population density of Cyatheaceae.
NETL
NSTL
万方数据
维普
