摘要
本文论述了鄂西七姊妹山罕见的珙桐群落的生态学特点及其保护对策。旨在更好地保护和恢复这一物种基因库;并可望在七姊妹山尽早建立以珙桐为保护对象的自然保护区,使其成为国际性的珙桐保护和研究中心。
The present paper deals with the major phytocoenological features of the dovetree community of Mt. Seven-sister in western Hubei and its protection strategies, and comes to the following conclusions;1) Ecological conditions of Mt. Seven-sister are good for the growth and development of dovetree and its community.2) The community possesses specified floristic composition and is dominated by the North-temperat(?) (?)l(?)ent and the East-Asian element3) Evergreen and deciduous phanerophytes, especially, the deciduous, play the most important role in the community, and the community belongs to montane mixed evergreen and deciduous broad-leaved forest in the subtropical zone.4) The community has marked stratification with three layers, i. e. tree layer (10-2Sm in height), shrub layer(0.5-5m in height)and herb layer with 80-95% of the total coverage.5) The stage structure of dovetree population is an increasing type or a stable type and in dynamic equilibrium as surrounding conditions change.6) The pattern of the dovetree population is contagious, and this kind of aggregation is determined by internal factors intrinsic to dovetree and environmental ones.7) The communty is basically stable but the random. smalt changes in plant numbers, in plant size or age, in community biomass, in the abundance of species or even in the flora may merely result in fluctuation, maturation of the stand or the combination of fluctuation and maturation.8) In oder to protect dovctree gene bank, the following measures should be taken:a)prohibiting the felling of dovetree individuals; b) setting up natural reserve;c) planting man-made dovetree community; d) doing scientific research on its biology and ecology and e) reiniorcing education and propaganda.
出处
《华中师范大学学报（自然科学版）》
CAS
CSCD
1990年第3期323-334,共12页
Journal of Central China Normal University：Natural Sciences
基金
"七五"国家重点科技项目
"神农■及三峡地区作物种质资源考察"(编号75-01-03-01)
关键词
珙桐群落
生态学
紫树科
生态保护
dovetree community
phyfocoenotogical feature
protection strategy
