摘要
调查和分析了白石砬子保护区早春类短命植物物种组成的数量特征,应用物种丰富度指数、Shannon-Wiener多样性指数、Pielou均匀度指数、Simpson优势度指数,定量描述了不同林型下早春类短命植物的物种多样性。结果表明:研究区有早春类短命植物12种2变型,隶属7科11属。黑水银莲花是早春类短命植物层片的优势种。花曲柳林下早春类短命植物物种数最多,枫桦林、红松阔叶林、落叶松林次之,蒙古栎林、杂木林、鱼鳞云杉臭冷杉林最少。多样性指数的变化趋势总体上表现为针阔混交林>落叶阔叶林>针叶林。均匀度指数的变化与多样性指数的变化趋势基本一致,与优势度指数的变化趋势相反。红松阔叶林下早春类短命植物物种多样性最高且各物种均匀分布,层片结构稳定。
Researches were made on the species composition characteristics of spring ephemerals in the Baishilazi Reserve; besides, thespecies diversity of spring ephemerals in different forest types were quantitatively studied by using species richness index, Shannon-Wiener diversity index, Pielou evenness index, and Simpson dominance index. The results showed that there were 12 species and 2 forms of spring ephemerals, belonging to 11 genera and 7 families. Anemone amurensis was the dominant species of the spring ephemerals synusia. The species number of the spring ephemerals in Fraxinus rhynchophylla forest was the highest, followed by Betula costata forest, Korean pine broad-leaved forest, Larix forest; the species numbers of the spring ephemerals in Quercus mongolicus forest, mixed forest, Piceajezoensis and Abies nephrolepis forest were the least. The variation trend of the diversity index generally was ordered as coniferous and broad-leaved mixed forest 〉 deciduous broad-leaved forest 〉 coniferous forest. The variation trend of the evenness index was similar to the diversity index, but opposite to that of dominance index. The species diversity of the spring ephemerals in Korean pine broad-leaved forest was the highest; the species distribution was even; the synusia structure was fairly stable.
出处
《生态科学》
CSCD
2011年第5期525-530,共6页
Ecological Science
基金
科技基础性工作专项2007年重点项目(2007FY110400)
