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长江源区紫花针茅草原群落数量分类与排序(PDF)

《广西植物》[ISSN:1000-3142/CN:45-1134/Q]

期数:
2014年05期
页码:
635-641
栏目:
植物生态与生物地理
出版日期:
2014-09-10

文章信息/Info

Title:
Quantitative classification and ordination of Stipa purpurea steppe community in source region of the Yangtze River
文章编号:
1000-3142(2014)05-0635-07
作者:
岳鹏鹏1 2 卢学峰2 叶润蓉2 周玉碧2 赵建忠2 彭 敏2*
1. 榆林学院 生命科学学院, 陕西 榆林 719000; 2. 中国科学院西北高原生物研究所, 西宁 810000
Author(s):
YUE Peng-Peng1 2 LU Xue-Feng2 YE Run-Rong2 ZHOU Yu-Bi2 ZHAO Jian-Zhong2 PENG Min2*
1. College of Life Sciences, Yulin University, Yulin 719000, China; 2. Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810000, China
关键词:
紫花针茅 数量分类和排序 物种多样性 青藏高原
Keywords:
Stipa purpurea quantitive classification and ordination species diversity Qinghai-Tibet Plateau
分类号:
Q948.15
DOI:
10.3969/j.issn.1000-3142.2014.05.010
文献标识码:
-
摘要:
选择长江源地区典型的紫花针茅草原作为研究对象,以大量的群落学样方调查为基础,采用TWINSPAN、DCA、物种多样性,相关分析等多元数量分析方法,系统研究了紫花针茅草原的群落特征、物种多样性、群落与环境因子的关系。结果表明:(1)所调查的紫花针茅草原是物种组成相对简单、菊科和禾本科植物最多、北温带分布属为主体的草原群落;(2)长江源区紫花针茅草原群落可划分为四个群丛类型:紫花针茅+密丛棘豆群丛,紫花针茅+梭罗草群丛,紫花针茅+伊凡苔草群丛,紫花针茅+弱小火绒草群丛;(3)影响群丛分布的主要环境因子首先是海拔、经纬度等空间因子,其次是湿润度、降雨量等水分因子的影响;(4)紫花针茅+伊凡苔草群丛的物种多样性是研究区四个群丛中最高的。Simpson指数和 均匀度指数受海拔、经纬度、平均降雨量、均湿润度等环境因子影响显著。该研究揭示了紫花针茅草原群落的内在规律。
Abstract:
The typical Stipa purpurea steppe in the source region of the Yangtze River was selected as subject. Multivariate statistics methods including TWINSPAN, DCA and correlation analysis were used to calculate the data on the basis of investigating a large number of vegetation communities in this region, in order to investigate the community characteristics, community diversity, and the relationship between community and environment factors. The results were as follows:(1)The species composition of S. purpurea steppe in the study area was relatively simple. The dominant families of seed plants were Gramineae and Compositoe, and the dominant areal types of genera were North temperate type;(2)The S. purpurea steppe community in the source region of the Yangtze River could be classified into 4 ecological associations:Ass. Stipa purpurea + Oxytropis densa, Ass. Stipa purpurea + Kengyilia thoroldia, Ass. Stipa purpurea + Carex ivanovae and Ass. Stipa purpurea + Leontopodium humilum;(3)The major environmental factors influenced the distribution of Stipa purpurea steppe ecological associations in source region of the Yangtze River firstly were space factors(altitude, longitude and latitude), then water factors(precipitation, wetness);(4)Ass. Stipa purpurea + Carex ivanovae hold the three highest indexes of the 4 ecological associations in the study area. Both evenness index and Simpson index were influenced by space factors and water factors. The present study proclaim the inner ecological rules of Stipa purpurea steppe in source region of the Yangtze River,and will play a very important role in maintaining the ecosystem equilibrium of ecologically fragile zones

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备注/Memo

备注/Memo:
收稿日期: 2014-04-11修回日期: 2014-05-17
基金项目: 陕西省自然科学基金(2011JQ5010); 陕西省教育厅科学研究项目(11JK0637); 榆林学院高层次人才项目(11GK07)。
作者简介: 岳鹏鹏(1981-)女,山东德州人,博士,讲师,研究方向为植物生态学、农业生态学等,(E-mail)yue_pengpeng@163.com。 *通讯作者: 彭敏,研究员,从事植被生态学及资源生态学研究,(E-mail)pengm@nwipb.ac.cn。
更新日期/Last Update: 2014-09-10