| Camellia talinensis is one of the national protected two-grade rare plants, and is becoming endangered by over felling and picking in recent years. C. talinensis communities of Qianjiazhai, located in Zhenyuan county Yunnan province, is the largest and best-preserved C. talinensis community in China. To better protect C. talinensis, we selected C. talinensis communities of Qianjiazhai as test objects, tree diversity and community structure were studied by field investigation. The results showed what C. talinensis was the dominant species of the second layer of trees, and the dominant species of the first layer included Litsea panamonja, Castanopsis wattii, Lithocarpustrun catus and so on. C. talinensis is the dominant species of the communities on the east- and south-facing slope, and the subdominant species on the west- and north-facing slope. Diameter and height classes analyses indicated that both species richness and abundance increased with Diameter and height of trees, which revealed that higher trees created environment for the lower trees. Slope directions played important roles in tree diversity, for example, tree diversity expressed as species number, Simpson Index and Shannon-Wiener Index showed communities of west-facing direction was the highest, and those of south- and north-facing slope stayed the middle, east-facing slope was the lowest. Communities of south-facing slope had the lowest similarity index with communities of other directions. In the end, the measures to well protect species diversity of communities and C.
talinensis populations were discussed. |
