摘要
生物多样性是当今世界生物环境研究中的重要课题，植物区系研究可为之做出贡献。本文根据文献和调查资料，运用统计和比较分析法，以属的丰富度和相似性系数为指标，研究全国及各省区中国种子植物特有属的多样性，得出６点结论，找到８个分布多度中心。中国种子植物特有属计有２６９属，含５５１种６０变种，占全国同类属数８．９％。归７８科，以热带科居多，中国特有８科。云南省的丰富度最大，有１３０属１９０多种，朝各方向递减，至秦岭─江下游以北显著降低。陕－甘和浙－赣的相似性系数最高，达８０％─９０％，南方各省间一般较高至极高（３０％－８０％），北方各省间一般较低至很低（３０％─１％），新疆、海南等与若干省无联系。还说明它们的区系特征及多样性变化的地理原因。为进一步研究中国植物区系和保护物种资源提供了依据。
The bio-diversity of endemic genera may present the endemism in a certain flora and is the foundation of conservation of bio-resources, especially metaplasm resourcea.Based on Flora of China and her Provinces and field survey, after statistics and analysis, the paper deals with the bio-diversity and characters of genera endemic to China different scale and concludes as follows: 1.There are 8 families and 269 endemic genera(containing 610 species and variety) dominated by mono-and oligo-typic genera more than 90%, of which a great number are rare,precious and endangered plants.2. All these genera fall into 78 families among them Tropical distribution pat-terns 27 families, Cosmopolitan , Temperate, East Asia-North American and China's respectively 20,13,10 and 8 families.3. The richness of genera in each province is divided into 12 classed.The highest is in Yunnan with 130 genera,more than 190 species and appearing a graduaIIy declining trend toward all directions,but it is obviouslv declined in northern China 4 The similarity of gen-era between any two provinces is divided into 9 levels with similarity coefficient from 0 to 90%。The highest is between Gansu and Shaanxi.5. There are 8 abundance centres which are the rather higher diversity locations in every geography region. 6 The areal differences of diversity are close relationship with the geologic￣(-), geomorphologic￣(-)and climatic patterns.
出处
《云南植物研究》
CSCD
1994年第3期209-220,共12页
Acta Botanica Yunnanica
基金
国家自然科学基金
关键词
特有属
生物多样性
中国
种子植物
Endemic genera, Bio-diversity, Richness,Similarity,Abundance centre,China
