白杨河——艾里克湖湿地及周边植物群落与环境因子的关系

应用数量分类和排序方法,对新疆白杨河-艾里克湖湿地植被进行了多元统计分析。结果表明,该研究区域主要植被类型中共有植物18种,隶属10科,17个属。其中,多数植物种类在样方中出现的频次较低,说明该地区植物物种丰富度较低。TWINSPAN结果表明,该地区植物可以分9个种类组,与实际调查结果一致。CCA排序结果同TWINSPAN分类结果基本一致,反映出植物群落分布格局随环境因子梯度变化的趋势。分析了不同环境因子的关系,并从定量的角度,以CCA排序图直观的揭示了决定艾里克湖湿地植物群落分布的环境因子主要是地下水位、土壤有机质,其回归模型分别为:X_1=-0．6037L 0．6824(R~2=0．6024);X_2=0．74530M 0．1142(R~2 =0．6004)。

Plant communities and their interrelations with environmental factors of wetlands and surrounding lands from Baiyang river to the Alice lake

Plant communities were sampled from Baiyang River to the Alice Lake Wetland,Xinjiang.The results showed that among the 35 sampled quartets from 24 sites,18 plant species were identified,which belong to 17 gen- era in 10 families of this study,most of which have low occurrence frequency in quadrats.Quantitative classifica- tion (TWINSPAN) and ordination (CCA) methods were used to study the distribution patterns of 18 plant species at 24 sites in this study area.The TWINSPAN analysis identified nine site association.The 18 plant species could be also divided into 9 ecological species groups using TWINSPAN analysis.CCA results were consistent with TWINSPAN results.The distribution patterns of plant species were most strongly associated with ground water,soil organism and soil pH value.The major environmental variables are ground water and soil organism,and the regres- sion model as below respectively:X_1=-0.6037L 0.6824 (R~2=0.6024),X_2=0.7453 OM 0.1142 (R~2 =0.6004)