沂蒙山区落叶阔叶林蜘蛛群落多样性研究

STUDY ON THE COMMUNITY DIVERSITY OF SPIDER IN DECIDUOUS BROADLEAF FOREST OF YIMENG MOUNTAINS OF CHINA

对沂蒙山区落叶阔叶林4块样地调查,蜘蛛群落的组成计有15科、32属、94种,其群落的种—丰盛度关系适于用对数正态分布(Log normal distribution)模型描述。4块样地中,1～2个个体和大于80个个体的物种所占总种类数的比例是Ⅳ(44.4％)>Ⅱ(40.5％)>Ⅲ(38.4％)>Ⅰ(35.3％)。不同类群的相对丰盛度因地而异,Ⅰ、Ⅱ号样地优势种为日本盖蛛、长肢盖蛛。而Ⅲ、Ⅳ号样地则为横纹金蛛。多样性(以N_1表示)的高低顺序为Ⅰ(19.62)>Ⅲ(11.32)>Ⅱ(8.75)>Ⅳ(6.24),极丰盛种所包括的个体总数占总个体数量的比例在69.2％～95.5％之间。

A survey from May 1989 to June 1996 on the spider community diversity in the four demonstration fields of deciduous broadleaf forest at Yimeng Mountains showed that 15 families and 32 genera and 94 species were found. Species -abundance of spider community can be described by means of log normal distribution modes. The proportion of species of 1 - 2 and more than 80 individual numbers occupying the total species numbers was Ⅳ (44. 4%)> Ⅱ (40. 5%)> Ⅲ (38. 4%)> Ⅰ (35. 3%). The relative abundance of different species were not the same in different environments. The dominant species of demonstration fields Ⅰ & Ⅱ were Nerene japonica and Neriene longedella. While that of fields I & IV was Arigiope bruennichii. Diversity (showed by N) was Ⅰ (19. 62)> Ⅲ (11. 32)> Ⅰ (8. 75)> Ⅳ (6. 24). The proportion of the extreme abundance species containing total individual numbers occupying total individual numbers was between 69. 2% and 95. 5%.