干旱区生态环境知识资源中心(Arid): 放牧对荒漠草原建群种和优势种生态位的影响

Arid

	放牧对荒漠草原建群种和优势种生态位的影响
其他题名	Effect of Grazing on Niche of Constructive and Dominant Species in the Desert Steppe
	吕世杰 1; 刘红梅 2; 吴艳玲 1; 卫智军2 ; 孙世贤 2; 王颖杰 2; 林森 1
来源期刊	生态环境学报
ISSN	1674-5906
出版年	2014
卷号	23 期号:10 页码:1600-1609
中文摘要	短花针茅荒漠草原建群种为短花针茅(Stipa breviflora),优势种为无芒隐子草(Cleistogenes songorica)和碱韭(Allium polyrrhizum), 3个种群地上现存量之和可达群落现存量的60%~80%,其数量消长、时空变化及结构的位移均会引起群落的巨大波动。为明确3个植物种群占有空间资源的能力、相互关系及其受放牧影响的变化规律,以内蒙古苏尼特右旗赛汉塔拉镇1999年建立的荒漠草原教学科研基地建群种和优势种为研究对象,于2012年8月在围封区(CK)和自由放牧区(CG)按样带法和样地法进行取样,运用生态位宽度指数、生态位重叠指数及灰色关联度进行数据分析,结果如下。受放牧影响,短花针茅和碱韭主要通过大幅度调节生态位宽度来保证植物种群存活及其在群落中的地位和作用,变化幅度分别为0.429~0.813和0.235~0.828;而无芒隐子草生态位宽度变化不大(为0.556~0.761),其对放牧影响的耐受性较强。在生态位重叠方面,短花针茅与无芒隐子草受放牧影响后分别与其他两植物种群重叠程度增加,而碱韭植物种群表现相反;生态位重叠程度变化与种对间的竞争能力有关,也与种对间的亲和能力有关,且存在不对称性。
英文摘要	Stipa breviflora was the constructive specie, and Cleistogenes songorica and Allium polyrrhizum were dominant species of Stipa breviflora desert steppe. Their aboveground present biomass reached to 60%?80% of the total biomass, of which quantities, time and space changes, and structure displacement causeed large fluctuations in communities. Niche breadth and niche overlap index were analyzed to make sure the capacity of resources consumption, the relationships and variation impacts by grazing in Stipa breviflora desert steppe in Inner Mongolia Saihantala research station,established in 1999. The samples were collected using the transect and plot method in contrast area (CK) and continuous grazing area (CG), in August 2012. The results were shown as follows. Stipa breviflora and Allium polyrrhizum affected by grazing mainly adjusted niche width to ensure plant populations survival and status or roles in the community, and their variation range were 0.429 to 0.813 and 0.235 to 0.828,respectively. Cleistogenes songorica did not change in niche width (0.556 to 0.761),and showed a strong resistance to grazing. Stipa breviflora and Cleistogenes songorica increased niche overlap extent with the other two populations due to grazing, whereas Allium polyrrhizum was the opposite. There was a relationship between niche overlap extent and populations competitive ability, and also linked with the populations affinity that exists asymmetry.
中文关键词	短花针茅荒漠草原 ; 建群种 ; 优势种 ; 生态宽度 ; 生态位重叠,灰色关联分析
英文关键词	Stipa breviflora desert steppe constructive specie dominant specie ecological width niche overlap
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:5296675
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231552
作者单位	1.内蒙古农业大学理学院, 呼和浩特, 内蒙古 010018, 中国; 2.内蒙古农业大学生态环境学院, 呼和浩特, 内蒙古 010019, 中国
推荐引用方式 GB/T 7714	吕世杰,刘红梅,吴艳玲,等. 放牧对荒漠草原建群种和优势种生态位的影响[J]. 内蒙古农业大学,2014,23(10):1600-1609.
APA	吕世杰.,刘红梅.,吴艳玲.,卫智军.,孙世贤.,...&林森.(2014).放牧对荒漠草原建群种和优势种生态位的影响.生态环境学报,23(10),1600-1609.
MLA	吕世杰,et al."放牧对荒漠草原建群种和优势种生态位的影响".生态环境学报 23.10(2014):1600-1609.