干旱区生态环境知识资源中心(Arid): 若尔盖高原沙化沼泽区植物群落物种组成及其驱动因素

Arid

	若尔盖高原沙化沼泽区植物群落物种组成及其驱动因素
其他题名	Species composition and associated driven factors of plant community in the desertified swamp area of Zoige plateau
	韩大勇; 杨永兴
来源期刊	生态学报
ISSN	1000-0933
出版年	2020
卷号	40 期号:16 页码:5602-5610
中文摘要	若尔盖高原沼泽区土壤沙化过程中植物群落的变化及其成因机制是亟待解决的区域关键科学问题之一。在若尔盖高原红原县沙化沼泽区,研究了土壤沙化梯度上植物群落种类组成、物种多样性、地上生物量的变化及其与土壤湿度、容重和孔隙度的关系。随着土壤沙化程度增加,群落特征种组替代顺序为华扁穗草(Blysmu s sinocompressus)种组高山嵩草(Kobresia pygmaea)种组四川嵩草(K. setchwanensi)种组黑褐穗苔草(Carex atrofusca subsp. minor)种组粗壮嵩草(Kobresia robusta)种组;植物种数(单位样方物种丰富度和总种数)和地上生物量均表现为单峰变化格局,但植物种数峰值出现在极轻度沙化的高山嵩草群落,地上生物量峰值出现在中度沙化的四川嵩草-黑褐穗苔草群落; beta多样性表现为U型变化格局,最高值出现在未沙化的华扁穗草群落,最低值出现在极轻度沙化的高山嵩草群落;土壤湿度对植物种多度影响最大,可解释总方差的24.8%,其次为土壤容重,可解释总方差的1.4%;沙化过程中土壤湿度是影响植物群落生态分布和种类构成的关键因素之一,尤其影响群落特征种的多度和分布。粗壮嵩草可考虑作为沙化土地植被恢复的先锋物种。
英文摘要	The vegetation community change and associated mechanism is one of the pressingly key scientific issues during soil desertification in the swamp area of the Zoige plateau. Along soil desertification gradients,changes of species composition,species diversity and aboveground biomass and their relation to soil physical properties,i. e. soil moisture, volume weight and porosity,were studied in the desertified swamp area,Hongyuan County,the Zoige plateau. As the increasing of the degree of soil desertification,the replacement order of community characteristic species group was Blysmus sinocompressus species groupKobresia pygmaea species groupK. setchwanensi species groupCarex atrofusca subsp. minor species groupKobresia robusta species group. Both the number of plant species (species richness per quadrate and total number of species) and above-ground biomass showed unimodal patterns. The highest number of plant species occurred in K. pygmaea community with extremely mild desertification,whereas the highest value of above-ground biomass occurred in K. setchwanensis-Carex atrofusca subsp. minor community with moderate desertification. The beta diversity showed U-shaped pattern,which was the highest in Blysmus sinocompressus community with non-desertification,whereas the lowest in Kobresia pygmaea community with extremely mild desertification. Soil moisture was most correlated with the variation of plant abundance and explained 24.8% of total variance,followed by soil volume weight and explained 1.4%. Soil moisture was considered a key factor in regulating the ecological distribution and species assemblage of plant community during the process of desertification,especially for the abundance and distribution of characteristic species. K. robusta was considered a pioneer species of vegetation restoration in desertificated land in the Zoige plateau.
中文关键词	植物种多样性 ; 特征种组 ; 植被恢复 ; 土壤沙化 ; 若尔盖高原
英文关键词	plant species diversity characteristic species group vegetation restoration soil desertification Zoige plateau
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Plant Sciences
CSCD记录号	CSCD:6800075
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353758
作者单位	韩大勇, 伊犁师范大学生物与地理科学学院, 伊宁, 835000. 杨永兴, 同济大学环境科学与工程学院;;浙江双良商达环保有限公司, 长江水环境教育部重点实验室;;污染控制与资源化研究国家重点实验室;;, ;;杭州, 上海;; 200092;;310013, 中国.
推荐引用方式 GB/T 7714	韩大勇,杨永兴. 若尔盖高原沙化沼泽区植物群落物种组成及其驱动因素[J],2020,40(16):5602-5610.
APA	韩大勇,&杨永兴.(2020).若尔盖高原沙化沼泽区植物群落物种组成及其驱动因素.生态学报,40(16),5602-5610.
MLA	韩大勇,et al."若尔盖高原沙化沼泽区植物群落物种组成及其驱动因素".生态学报 40.16(2020):5602-5610.