摘要
野生植物与柑桔亚群落在种-多度关系上有明显差异。野生植物两处理区(生草区、除草区)内的节肢动物种类丰富度,多样性差异显著,均匀性与多样性变化格局相一致。整个桔园生态系统冬季的多样性指数最低,春季逐渐回升,夏季达到最高,秋季又趋下降。此外,优势种对多样性、均匀性的影响大。本文提出了一个经过修改的生态位宽度公式B=ΣP_i^2/S,其运用结果与实际情况相吻合,并对4种生态位重叠指数公式作了比较。
This paper deals with species-abundance distributions and diversity in two regions, one cover-crops-growing region and one herbicide-treated region.There are significant differences in species-abundance distributions between cover-crops and citrus subcommunity.Significant difference in species richness, divesity and existed between two eegions both for cover-crops and citrus. The diversity of arthropod community is the lowest in winter, the highest in summer, and it increases in spring, decreases in fall. The dynamics of evenness . show the same pattern as diversity does. And the influence of dominant species to diversity and evenness is important. This paper also provides a revised index of niches, and four kinds of indexes of niches overlapping are discussed.
出处
《生态学报》
CAS
CSCD
北大核心
1992年第2期125-134,共10页
Acta Ecologica Sinica
关键词
柑桔园
野生植物层
节肢动物群落
species-abundance, diversity, evenness, niche breadth, niche overlapping.
