摘要
There are five wild populations of Cycas fairylakea in Guangdong Province,China,three of which are newly found.A study of the biological characteristics of C.fairylakea populations showed that this species had a narrow colonization area within 300 hm^(2),and an island pattern of distribution.Because of the overexploitation,urbanization,environment pollution,plant diseases,and insect pests,the wild populations and individuals of C.fairylakea decreased markedly in the past decades.All five populations have an opposite pyramid age structure,few coning plants,few seed production,and low level of seed germination rate or sterility.In conclusion,C.fairylakea in Guangdong Province was threatened seriously and an urgent need to take effective efforts to protect the plants and habitats in its location sites was required.
基金
This paper was supported by the grants from the National Natural Science Foundation of China(No.30070062)
the Natural Science Foundation of Guangdong Province(No.04300604 and 000975)
South China Botanical Garden,the Chinese Academy of Sciences(No.2002−3293).
