干旱区生态环境知识资源中心(Arid): 山地荒漠草原不同植物群落物种-多度关系分析

Arid

	山地荒漠草原不同植物群落物种-多度关系分析
其他题名	Analysis on the Species-abundance Relationship of Different Plant Communities in the Mountain Desert-grassland
	尚占环 1; 姚爱兴 2; 龙瑞军 1
来源期刊	河北大学学报. 自然科学版
ISSN	1000-1565
出版年	2005
卷号	25 期号:2 页码:173-178
中文摘要	在群落样方调查的基础上,计算群落物种重要值,确定群落类型.对群落物种重要值采用分割线段模型(broken stick model)、对数级数分布(Log series distr ibution)、对数正态分布(Lognormal distribution)、几何级数分布(Geometric series distribution)等4个种-多度模型进行拟合.结果表明石质山坡(长芒草Stipa bungeana-冷蒿Artemisia frigida)群落对数级数拟合结果更好,土质山坡群落(短花针茅Stipa brevifora-长芒草Stipa bungeana)对数正态分布拟合更好,说明了2个群落结构是对2个样地环境特点与放牧干扰相互作用的响应.沙化草地(油蒿Artemisiaordosica-刺叶柄棘豆Oxytropis aciphlla)群落中油蒿处于极优势地位,占据整个群落的大多数生态空间.拟合检验表明该山地草地植被物种分布格局较符合随机生态位假说和生态位占领假说,严重的放牧干扰不仅降低了优势物种在群落中的优势程度,使次优势物种及其他物种也没能较好的发育,说明外部非生物环境对群落胁迫程度较大.
英文摘要	Based on the sampling investigation and calculating important value of all samples, three types of communities were confirmed. Four species-abundance relationship models(broken stick model, Log series distribution, Log normal distribution, Geometric series distribution)were used to fit three plant community distribution patterns in the typical mountain desert-grassland in Ningxia Xiangshan region. The result showed that, the stone-hill slope ( Stipa bungeana-Artemisia frigida community) and the soil-hill slope ( Stipa breviflora-Stipa bungeana community) were fit by Log series distribution model and Log normal distribution model more than others,and also showed that those community structure and component were a response pattren to environment factors and long-term disturbance with grazing in the mountain grassland. In the desert grassland {Artemisia or-dosica-Ammopiptantus mongolicus community}, Artemisia ordosica was most dominant species and its ecologi-cal niche was very large that occupied the most ecological space of the community. The statistical checking result showed that two hypothesis (randomly ecological niche hypothesis and ecology niche occupation hypothesis) con-firmed with the species distribution pattern of the mountain vegetation. The disturbance of grazing not only re-duced the dominant degree of dominant species, but also reduced dominant degree of sub-dominant species and others species were not growing or developing well. All study results indicated that all communy patterns and dy-namics were disturbed by some external no-biology factors (grazing and drought ect. )much more than by others.
中文关键词	干旱山地 ; 荒漠草原 ; 物种多样性 ; 种-多度模型
英文关键词	drought mountain region desert grassland species diversity species-abundance relationship model
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:1913097
来源机构	甘肃农业大学 ; 宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/206380
作者单位	1.甘肃农业大学,草业学院, 兰州, 甘肃 730070, 中国; 2.宁夏大学,草业科学研究所, 银川, 宁夏 750105, 中国
推荐引用方式 GB/T 7714	尚占环,姚爱兴,龙瑞军. 山地荒漠草原不同植物群落物种-多度关系分析[J]. 甘肃农业大学, 宁夏大学,2005,25(2):173-178.
APA	尚占环,姚爱兴,&龙瑞军.(2005).山地荒漠草原不同植物群落物种-多度关系分析.河北大学学报. 自然科学版,25(2),173-178.
MLA	尚占环,et al."山地荒漠草原不同植物群落物种-多度关系分析".河北大学学报. 自然科学版 25.2(2005):173-178.