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机构地区:[1]贵州大学生命科学学院
出 处:《山地农业生物学报》2008年第3期233-236,共4页Journal of Mountain Agriculture and Biology
摘 要:经初步研究,岩下大鲵自然保护区有水生种子植物25科,32属,46种,其中双子叶植物有15科,17属,24种;单子叶植物有10科,15属,22种。挺水植物有37种,占80.4%;浮水植物有5种,占10.8%;沉水植物有4种,占8.7%。区系分析结果表明,共有8种分布类型和1个变型,植物区系具有明显的热带性质。热带分布有12属,15种,不计世界分布,占属数的60%、种数的57.69%;温带分布型共有8属,11种,占属数的40%、种数的42.31%。调查发现该区有外来入侵植物凤眼莲Eichhornia crassipes(Mart.)Solms,应对此类物种予以足够的重视,避免其形成大面积入侵。On the basis of the preliminary survey and analysis. It was found that in Yanxia Andrias davidianus nature reserve there' re water-borne seed plants , including 25 families ,32 genera and 46 species , of which 15 families, 17 genera,24 species are dicotyledoneae , 10 families, 15 genera,22 species are monocotyledoneae ,37 species are straight hydrophyte, accounting for 80. 4% ,5 species are hydrophyte, making up 10. 8%,4 species are submersed plant, making up 8. 7%. The analysis of the genera indicates that there' re 8 distribution types and 1. Plant genera is characteristic of tropical elements with 12 genera ,15 spreading out in the tropical zone ,accounting for 60% of the genera ,57. 69% of the total number ,world distribution excluded. The temperate distribution type comprises 8 genera and 11 species ,making up 40% of the genera and 42. 31% of the total number. By conducting the survey an alien invading plant-Eichhornia crassipes ( Mart. ) Solms was found has been existed in this area. Great importance should be attached to this species to avoid its growing in this area at a large scale.
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