吴昊, 张梦, 姬秋博, 饶本强. 浉河河岸带草本群落数量分类、排序及物种多样性[J]. 信阳师范学院学报(自然科学版), 2021, 34(2): 216-224. DOI: 10.3969/j.issn.1003-0972.2021.02.008
引用本文: 吴昊, 张梦, 姬秋博, 饶本强. 浉河河岸带草本群落数量分类、排序及物种多样性[J]. 信阳师范学院学报(自然科学版), 2021, 34(2): 216-224. DOI: 10.3969/j.issn.1003-0972.2021.02.008
WU Hao, ZHANG Meng, JI Qiubo, RAO Benqiang. Classification, Ordination and Species Diversity of Herbal Community in Shihe River Riparian[J]. Journal of Xinyang Normal University (Natural Science Edition), 2021, 34(2): 216-224. DOI: 10.3969/j.issn.1003-0972.2021.02.008
Citation: WU Hao, ZHANG Meng, JI Qiubo, RAO Benqiang. Classification, Ordination and Species Diversity of Herbal Community in Shihe River Riparian[J]. Journal of Xinyang Normal University (Natural Science Edition), 2021, 34(2): 216-224. DOI: 10.3969/j.issn.1003-0972.2021.02.008

浉河河岸带草本群落数量分类、排序及物种多样性

Classification, Ordination and Species Diversity of Herbal Community in Shihe River Riparian

  • 摘要: 在信阳市浉河河岸带湿地设置30个草本群落样地,利用TWINSPAN分类和DCA排序相结合的方法划分其群落类型,并利用CCA和RDA排序探讨环境因子对群落物种分布及物种多样性的影响.结果表明:30个样地群落可划分为3种群落类型,分别为菵草+酸模+红蓼群落、马唐+鬼针草+水蓼群落、藜+酸模群落.菵草+酸模+红蓼群落为主要类型,物种TWINSPAN分类及DCA排序清晰地反映出了群落所在生境的水分梯度变化.CCA排序显示,决定物种分布的主导性环境因子为土壤速效氮和速效钾,大部分植物趋向分布于中低水平的土壤环境中.RDA排序显示,Patrick丰富度指数与土壤pH值具有密切的正向关系,Shannon-Wiener和Simpson多样性指数与土壤速效钾具有密切的正向关系,而Pielou均匀度指数与土壤速效氮具有极高的负向关系.

     

    Abstract: Thirty plots of herbaceous community were set up in the Shihe river riparian wetland of Xinyang city. The TWINSPAN classification and DCA ordination methods were used to divide community types, while the CCA and RDA ordination methods were used to explore the effects of environmental factors on plant distributions and species diversity. The results showed that 30 plots could be divided into three community types, those were Beckmannia syzigachne + Rumex acetosa + Polygonum orientale, Digitaria sanguinalis + Bidens pilosa + P. hydropiper and Chenopodium album + R. acetosa, while B. syzigachne + R. acetosa + P. orientale was the dominant type. TWINSPAN and DCA clearly reflected the variations of moisture gradient within community habitats. CCA indicated that soil available nitrogen and available potassium were the primary environmental factors that determined plant species distribution, most species trended to distribute in the low and medium levels of soil nutrients. RDA indicated that Patrick richness index had significantly positive relationships with soil pH value, Shannon-wiener and Simpson diversity index all had significantly positive relationships with soil available potassium, while Pielou evenness index had highly negative relationships with soil available nitrogen.

     

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