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坡向对香根草护坡地植物群落特征的影响

刘金根;薛建辉   

  1. 南京林业大学森林资源与环境学院江苏省林业生态工程重点实验室, 南京 210037
  • 收稿日期:2008-07-04 修回日期:1900-01-01 出版日期:2009-03-10 发布日期:2009-03-10

Effects of slope aspect on plant community characteristics of Vetiveria zizanioides slope-protection land.

LIU Jin-gen;XUE Jian-hui   

  1. Key Laboratory of Forestry Ecological Engineering of Jiangsu Province, College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China
  • Received:2008-07-04 Revised:1900-01-01 Online:2009-03-10 Published:2009-03-10

摘要: 经连续2年定点调查,研究了不同坡向对香根草(Vetiveria zizanioides)护坡地植物群落早期演替阶段特征的影响。结果表明:最早迁入边坡地定居的主要为菊科、禾本科和豆科类植物,三者物种数占物种总数比例为59.09%~92.86%;不同坡向植物群落特征从香根草栽后第2年开始出现差异;阳坡香根草种群物种优势度明显高于阴坡的物种优势度,且阳坡香根草种群持续上升,阴坡香根草种群则呈衰退趋势;植物群落丰富度指数、多样性指数、均匀度指数均与群落中香根草物种优势度呈极显著线性负相关;生态优势度指数与群落中香根草物种优势度呈极显著线性正相关。

关键词: 生物修复, 浮游植物, 群落

Abstract: Base on 2-year consecutive investigation from June 2005 to October 2006, the effects of different slope aspects on the early-stage succession characteristics of plant communities on Vetiveria zizanioides slope-protection land were studied. The results showed that in the earliest period, the main plants settled on the slope-protection land were of Gramineae, Compositae and Leguminosae, with their species number occupying 5909%〖KG-*2〗-〖KG-*7〗9286% of the total. Since the second year of V. zizanioides planting, the characteristics of the plant communities on sunny and shady slopes began to differ. V. zizanioides population had obviously higher species dominance on sunny slope than on shady slope, and kept increasing on sunny slope but represented a declining trend on shady slope. The species dominance of V. zizanioides population was significantly negatively correlated with the richness, diversity index, and evenness index of the plant communities, but positively correlated with the community ecological dominance index.

Key words: Bio-remediation, Phytoplankton, Community