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OALib Journal期刊
ISSN: 2333-9721
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辽河保护区及其支流河岸草本植物群落数量分析
DOI: 10.3724/SP.J.1145.2015.04016, PP. 904-911
Keywords: 辽河保护区,河岸带,草本植物,物种多样性,海拔,河流等级
Abstract:
研究河岸草本植物群落特征是河岸植被生态修复的前提.采用样线法调查辽河保护区及其支流的河岸带草本植物群落，分析物种多样性特征，利用组平均聚类法和除趋势对应分析（dca）对群落进行分类和排序，并探讨影响河岸草本植物群落分布的主要环境因子.结果显示：辽河保护区及其支流河岸共有草本植物154种，分属40科96属.山区河流的河岸草本植物物种多样性低于平原地区河流，支流的河岸物种多样性高于辽河保护区；群落物种多样性与河流坡降、蜿蜒度以及河流等级显著相关（p<0.01）.聚类分析结果显示，辽河保护区及其支流河岸带草本植物群落可划分为23种类型，其中湿生植物群落占据优势，包括无芒稗（echinochloacrusgalli）群落、水芹（oenanthejavanica）群落、水蓼（polygonumhydropiper）群落、疣草（murdanniakeisak）群落、蒌蒿（artemisiaselengensis）群落、？草（scirpustriqueter）群落、卵穗荸荠（heleocharissoloniensis）群落、红鳞扁莎（pycreussanguinolentus）群落、褐穗莎草（cyperusfuscus）群落、芦苇（phragmitesaustralis）群落、两栖蓼（p.amphibium）群落、圆锥薹草（carexdiandra）＋蒌蒿群落和圆锥薹草＋沼生？菜（rorippaislandica）群落.dca排序轴与环境因子的相关性分析表明，海拔、坡降、蜿蜒度和河流等级对辽河保护区及其支流河岸带草本植物群落的分布具有影响，其中河流等级的贡献率最大，其次为海拔和坡降，蜿蜒度贡献率最小.本研究中拂子茅（calamagrostisepigeios）、荻（triarrhenasacchariflora）和芦苇是恢复河岸植被的优良物种.
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