中国典型地带陆生等足类的区系研究

TERRESTRIAL ISOPODA FAUNA OF TYPICAL ZONES IN CHINA

通过对我国 5个典型地带 (热带、亚热带、暖温带、温带、高寒带 ) 2 0个样点进行陆生等足类的调查采集 ,共发现陆生等足类 1 1科、 2 9属、 72种。由于各地带自然环境明显不同 ,造成了物种分布上的差异 ,其中热带和亚热带地区种类最多 ,分别为 38种和47种 ,两地带物种共占总种数的 80 %以上 ;暖温带和温带地区仅发现 9种 ,而高寒带由于平均气温在 0℃以下 ,不利于陆生等足类的生存 ,故迄今仅发现 2种。其区系特点为 :( 1 )区系分布的地带性强、特有种多 ;( 2 )东洋界热带、亚热带区系占主导地位 ;( 3)物种栖息生境多样 ;( 4 )与日本区系比较 ,种级阶元差异较大 ,约有 84%以上的种类与日本不同 ,进一步反映种类区系分布具有地带性强的特点。

By collecting specimens of terrestrial Isopoda in 20 sampling areas throughout five typical zones of tropical, subtropical, warm temperate, temperate and high frigid zone in China, A total of 11 families, 29 genera and 72 species of terrestrial Isopoda were collected. Due to the existence of big zonal differences in their environmental surroundings, we found out a diversis species distribution pattern. Tropical and subtropical zones are the most rich in ones member of species with a total of 38 and 47 species respectively. The number of species of tropical and subtropical zones made up more than 80% of the total terrestrial Isopoda in China. Only nine species were found in temperate and warm temperate zones. In boreal region, due to the average temperature is below zero degree and which is unfavourable for the existence of terrestrial Isopoda, so only two species were found. As compared with terrestrial Isopoda species in Japan, there are big differences between species category, so far more than 84%. Chinese species are indicating the faunastic differences endemic in terrestrial Isopada in China and Japan.