GAO Yuan,WANG Jifei,YANG Junlong,et al.Relationship Between Bryophytes Communies and Environment of Qinghai Spruce (Picea crossifolia) in Helan Mountain of Ningxia[J].Research of Soil and Water Conservation,2019,26(01):221-226,233.
贺兰山东坡青海云杉林苔藓群落及环境之间的关系
- Title:
- Relationship Between Bryophytes Communies and Environment of Qinghai Spruce (Picea crossifolia) in Helan Mountain of Ningxia
- Keywords:
- eastern slope of Helan Mountain; Picea crossifolia forest; bryophytes; species composition; environmental factor
- 分类号:
- Q948.1
- 摘要:
- 苔藓植物作为一种环境指示植物广泛应用于生态各领域。以贺兰山东坡青海云杉（Picea crassifolia）林下苔藓群落为研究对象，沿着东坡山体设置了15个样地，运用冗余分析（RDA）对苔藓物种重要值与环境因子进行了排序，以期揭示贺兰山苔藓植物群落结构与环境因子之间的关系。结果表明：15个样地485份标本都是地面生苔藓，共有14科19属36种，主要是丛藓科（Pottiaceae）、灰藓科（Hypnaceae）、青藓科（Brachytheciaceae）、牛毛藓科（Ditrichaceae）和提灯藓科（Mniaceae），占苔藓植物总数的69.44%；15个样地苔藓物种重要值大小排序显示：优势种分别为灰藓（Hypnum cupressiforme）、山羽藓（Abietinella abietina）、树形疣灯藓（Trachycystis ussuriensis）、美姿藓（Timmia megapolitana）、青藓（Brachythecium pulchellum）、对叶藓（Distichium capillaceum）、无齿紫萼藓（Grimmia anodon）、厚角绢藓（Entodon concinnus）、细牛毛藓（Ditrichum flexicaule）和中华赤藓（Syntrichia sinensis），其中灰藓的重要值为0.417 6，是贺兰山东坡青海云杉林下苔藓植物主要的建群种，说明贺兰山东麓云杉林下较为干燥。RDA结果表明：海拔（F=5.124，p=0.010）、坡向（F=3.114，p=0.034）、年均降雨量（F=2.598，p=0.050）和年均温度（F=3.357，p=0.030）是影响苔藓群落分布的主要因素，第一和第二主轴共计可以解释苔藓群落方差63.20%。研究结果可以为贺兰山苔藓植物保护和合理利用提供理论依据。
- Abstract:
- As an environmental indicator, bryophytes are widely used in various fields of ecology. This study took bryophyte community of Picea crassifolia on the eastern slope of Helan Mountain as research object. Fifteen plots were set up along the eastern slope. Redundancy analysis (RDA) was performed to reveal the relationship between bryophyte community structure and environmental factors in Helan Mountain. The results showed that all 485 samples from 15 plots were terrestrial mosses, belonging to 36 species and 19 genera in 14 families; the main families are Pottiaceae, Hypnaceae, Brachytheciaceae, Ditrichaceae and Mniaceae, accounting for 69.44% of the total number of bryophytes; The rank order of important values of bryophytes species in 15 plots showed that the dominant species were Hypnum cupressiforme, Abietinella abietina, Trachycystis ussuriensis, Timmia megapolitana, Brachythecium pulchellum, Distichium capillaceum, Grimmia anodon, Entodon concinnus, Ditrichum flexicaule and Syntrichia sinensis. The important value of the Hypnum cupressiforme is 0.417 6, which is the constructive species of bryophytes community, this also indicates that the Picea crossifolia on the eastern slope of Helan is relatively dry. The results of RDA showed that altitude(F=5.124, p=0.010), Aspect(F=3.114, p=0.034), mean annual precipitation (F=2.598, p=0.050), mean annual temperature(F=3.357, p=0.030), were the main factors influencing the distribution of bryophytes. The first and second principal axes can explain 63.20% of the variance in bryophyte community. The results can provide theoretical basis for the protection and rational utilization of bryophytes in Helan Mountain.
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备注/Memo
收稿日期:2018-2-6;改回日期:2018-3-8。
基金项目:宁夏贺兰山国家级自然保护区保护与监测工程项目及科研与监测工程监测样地项目；宁夏高等学校一流学科建设（草学学科）资助项目（NXYLXK2017A01）
作者简介:高媛(1995-),女,山西忻州人,在读硕士生,研究方向为草地生态、资源与环境。E-mail:gyuan_nxu@163.com
通讯作者:李小伟(1978-),男,甘肃平凉人,副教授,博士,研究方向为植物分类与生态。E-mail:Lixiaowei@nxu.edu.cn