生物多样性

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我国珍稀特有植物珙桐的现状及其保护

贺金生,林洁,陈伟烈   

  1. (中国科学院植物研究所,北京 100044)
  • 收稿日期:1994-09-12 修回日期:1994-12-02 出版日期:1995-11-20 发布日期:1995-11-20

The current status of endemic and endangered species Davidia involucrata and the preserving strategies

He Jinsheng, Lin Jie, Chen Weilie   

  1. Institute of Botany,Academy Sinica,Beijing 100044
  • Received:1994-09-12 Revised:1994-12-02 Online:1995-11-20 Published:1995-11-20

摘要:

本文根据野外调查和已有的资料,研究了我国珍稀特有植物珙桐(Davidia involucrata)及珙桐林的天然分布特点,分布区的自然环境概况,群落的区系特点,群落学特征及保护策略。珙桐天然分布在我国的中亚热带和北亚热带,水平分布呈不连续状。在垂直带谱上,属于亚热带山地常绿落叶阔叶混交林带的范围。组成珙桐林的种子植物以北温带和东亚分布属占优势,物种组成不仅比较丰富,而且含有较多古老、特有和稀有成分。以珙桐为优势种、共优种的群落全都是混交林,可以分为以珙桐等落叶树种为优势种的落叶常绿阔叶混交林和以常绿树种为优势种的常绿落叶阔叶混交林,根据调查,初步定为10个群落类型,并认为对珙桐及其群落的保护,应立足于就地保护。

Abstract

According to field investigation, the natural distibution zone,environmental condition,floristic composition and community characteristics of endemic and endangered species,Davidia involucrata were studied. The results showed that Davidia involucrata was naturaly distributed in middle and northern subtropical China,and the distribution was discontinuous.It verticaly distributed in mountane evergeen and deciduous broad leaved forest belt. With regard to the distributional area pattern of seed plants (genera), the percentage of the North Temperate and East-Asian element was higher.With a high rate of relic, endemic and rare species,communities dominated or co dominated by Davidia can be divided into two groups.One group was mainly dominated by deciduous species, and the another has a high rate of evergreen species. Ten community types were identified,and the preserving strategies should be based on in situ protection.