干旱区生态环境知识资源中心(Arid): 西藏色季拉山川滇高山栎群落生态位特征

Arid

	西藏色季拉山川滇高山栎群落生态位特征
其他题名	Niche characteristics of Quercus aquifolioides community on the Sejila mountains, Tibet, China
	尼玛曲珍 1; 张玺 1; 谭坤 1; 鲁闯 1; 王国严 1; 徐阿生 2; 罗建 2
来源期刊	生态科学
ISSN	1008-8873
出版年	2018
卷号	37 期号:3 页码:51-58
中文摘要	探索群落构建背后的包括生态位分化与重叠在内的过程机制对于预测环境变化背景下的群落动态和开展区域物种多样性保护至关重要。藏东南地区由于地理和交通条件限制,森林群落受人为干扰相对较少,是开展群落生态学理论研究的天然实验室。在样地调查的基础上,以物种重要值作为资源状态指标,应用Levins、Shannon-Wiener生态位宽度指数和Horn生态位重叠指数,分析了色季拉山川滇高山栎群落49个主要种生态位特征。结果表明: (1)色季拉山川滇高山栎群落中,川滇高山栎(Quercus aquifolioides)、小叶忍冬(Lonicera microphylla)、秦岭槲蕨(Drynaria sinica)的生态位宽度分别在乔、灌、草本层中占有优势地位; (2)群落各林层内部生态位重叠,表现为草本层>灌木层>乔木层; (3)群落各林层之间生态位重叠,表现为灌草>乔灌>乔草。(4)川滇高山栎作为先锋树种,其群落在藏东南地区的水土保持与荒漠化防治作用突出,群落内林层内和层间的不同植物对阳光、空间等资源的生态位重叠促进了物种的共存,证明了高山地区强烈的环境过滤作用导致的生态位分化和对生境需求相似的物种间的生态位重叠是促进藏东南川滇高山栎群落生物多样性共存的重要机理。
英文摘要	Understanding the mechanisms including niche differentiation and overlap behind community assembly plays an important role in predicting community dynamic and protecting local biodiversity. Due to geographical and traffic restrictions, forest communities on the southeastern Tibetan Plateau are relatively less disturbed by human activities, resulting in a natural laboratory for theoretical research on community ecology. Based on field investigation and utilized importance value of plant species as indicator of resource status, the niche breadth and overlap of 49 main plant species in community of Quercus aquifolioides on the Sejila Mountains was studied using Levins, Shannon-Wiener and Horn indices. The results showed that (1) Q.aquifolioides, Lonicera microphylla, and Drynaria sinica had the largest niche breadths in the tree, shrub, and herb layers, respectively, in the Q.aquifolioides community on the Sejila Mountains; (2) the niche overlap within forest layers showed as herb layer> shrub layer > tree layer; (3) the niche overlap between species from different layers showed as the values between shrub and herb > between tree and shrub> between tree and herb; (4) as a pioneer tree species, Q. aquifolioides and its community played important roles in soil and water conservation and desertification control on the southeastern Tibetan plateau. In the community of Q.aquifolioides, coexistence of species inter-and intra-levels was promoted by the niche overlap on the sunlight and spatial resource between various species. This result demonstrated that the niche differentiation caused by niche overlap was one of the important mechanisms in the coexistence of biodiversity of Q. aquifolioides community on the southeastern Tibetan plateau. In the community of Q. aquifolioides; the inter- and intralevels species coexistence was promoted by the niche overlap on the sunlight and spatial resource between various species. This result demonstrated that the niche differentiation caused by strong environmental filtering in alpine regions and the niche overlap between species with similar habitat requirements were the important mechanisms in the coexistence of biodiversity of Q.aquifolioides community on the southeastern Tibetan plateau.
中文关键词	藏东南 ; 群落构建 ; 生物多样性 ; 川滇高山栎群落 ; 生态位宽度 ; 生态位重叠
英文关键词	southeastern Tibet community assembly biodiversity Quercus aquifolioides community niche breadth 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:6282010
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238089
作者单位	1.西藏农牧学院资源与环境学院, 林芝, 西藏 86000, 中国; 2.西藏农牧学院高原生态研究所, 林芝, 西藏 86000, 中国
推荐引用方式 GB/T 7714	尼玛曲珍,张玺,谭坤,等. 西藏色季拉山川滇高山栎群落生态位特征[J],2018,37(3):51-58.
APA	尼玛曲珍.,张玺.,谭坤.,鲁闯.,王国严.,...&罗建.(2018).西藏色季拉山川滇高山栎群落生态位特征.生态科学,37(3),51-58.
MLA	尼玛曲珍,et al."西藏色季拉山川滇高山栎群落生态位特征".生态科学 37.3(2018):51-58.