现代轮藻地理分布的基本规律的探讨  

PROBED INTO THE BASIC LAWS OF GEOGRAPHICAL DISTRIBUTION OF LIVING CHAROPHYTES

作　　者：陈维群[1] 彭厚银 

机构地区：[1]四川大学分析测试中心 [2]四川大学研究生部

出　　处：《四川大学学报（自然科学版）》1990年第3期354-360,共7页Journal of Sichuan University(Natural Science Edition)

摘　　要：在地球上的轮藻已知的约有410种,分隶于6个属,即丽藻属(Nitella),拟丽藻属(Nitellopsis),鸟巢藻属(Tolypella),灯枝藻属(Lgchnothamnus).丽枝藻属(Lamprothamnium)和轮藻属(Chara).根据每个种地理分布的统计结果,发现现代轮藻的地理分布有5条基本规律:(1)世界种占有较高的百分比;(2)孤立地区的特有种比较丰富;(3)中国西南地区的地理成分特别复杂;(4)南北两半球的亚热带地区种数最多;(5)结构简单的分类群多分布于南北球.According to the statistics and analysis ef the total charephytes in the world>some basic laws can be shown as following: 1. The cosmopelitan species of the charophytes possess a higher percentage than the vascular plants. 2. There are more endemic species in the isolated district. 3.The number of the total species are most in subtropical zones of both the southl-ern and the northern hemispheres. 4. The taxa of simple structure occupy a dominant position in the southern hemisphere. 5. The geographical elements of charophytes-flora is especia-ly complicated in Southwestern China.

关 键 词：轮藻 地理分布 分类群 

分 类 号：Q949.218.3[生物学—植物学]