浙江金华市郊地面苔藓植物生态位研究

在金华市郊不同生境设立30个样点。调查发现共有67种地面苔藓植物。计测了其中的54个主要种类的生态位重叠值和宽度,以生态位重叠值为指标,应用最小生成树法和主坐标排序法对它们进行分类。结果发现,金华市郊的地面生苔藓植物可被分成3个生态类群,苔藓植物种数(N)与生态位宽度(B)符合:N=27.304e 11.425B(R2=0.9915),大部分的地面生苔藓植物生态位宽度很窄。

Niche of bryophytes on the floor in Jinhua suburb, Zhejiang Province

Thirty sites were sampled in different habits in Jinhua suburb. Sixty seven bryophyte species were recorded. Among them, fifty four main species were surveyed to obtain their coverages. Their niche overlaps and width were calculated. Based on their niche overlaps, the ordination plot of Principal Axes Analysis (PAA) and the Minimal Spanning Tree (MST) were drawn. The main results are as follows: (1)The main ground bryophytes could be divided into three ecological groups; (2)The relationship between the number of bryophyte species (N) and their niche width (B) are as follows: N = 27.304 e 11.425 B(R2=0.991 5). Obviously, most bryophyte species have very narrow niche width.