干旱区生态环境知识资源中心(Arid): 长江源区沙化高寒草地植被群落特征及其与地形因子的关系

Arid

	长江源区沙化高寒草地植被群落特征及其与地形因子的关系
其他题名	Study on the characteristics of sandy alpine grasslands and its relationship between plant distribution and microtopography in the source regions of Yangtze River
	赵鹏 1; 屈建军2 ; 徐先英 3; 唐进年 3; 韩庆杰 2; 谢胜波 2; 王涛2 ; 赖俊华 2
来源期刊	生态学报
ISSN	1000-0933
出版年	2019
卷号	39 期号:3 页码:1030-1040
中文摘要	草地沙化与植物群落演替关系对高寒草地生态系统功能和结构的维持具有重要的意义。以长江源区七渡口沙化高寒草地为研究对象,基于野外植物群落物种组成及地形因子调查数据,运用数量分类与排序等方法,探究了沙化高寒草地植物群落特征及其与微地形环境因子的关系。结果表明:60个调查样方中出现29个植物种,隶属16科,27属。赖草、细叶亚菊、绳虫实等植物种的出现指示高寒草地沙化处于进展之中,植被群落向旱生方向演替。物种标准频度分布在不同微地形表现各异,总体上优势种比例低于稀有种,植被群落处于高度演替阶段。TWINSPAN将沙化高寒草地划分为7个群丛类型:I赖草+阿尔泰狗娃花+牛耳风毛菊Leymus secalinus+Heteropappus altaicus+Saussurea woodiana, Ⅱ赖草+喜马拉雅嵩草+绳虫实Leymus secalinus+ Kobresia royleana+Corispermum declinatum, Ⅲ赖草+披碱草+细叶亚菊Leymus secalinus +Elymus dahuricu +Ajania tenuifolia, Ⅳ赖草+高山野决明Leymus secalinus+Thermopsis alpina, V老芒麦+早熟禾Elymus sibiricus+Poa alphannua, Ⅵ老芒麦+批碱草Elymus sibiricus+ Elymus dahuricus, Ⅶ绳虫实Corispermum declinatum。7个群丛在DCA排序图上的分布呈现一定的规律性。CCA排序结果表明,坡度和坡向是沙化高寒草地物种分布的微地貌主导因子。
英文摘要	Sandy alpine grasslands are an important community type in source regions of the Yangtse and Yellow rivers, which affect the progress and reversal of desertification. Our objective was to determine sandy alpine grassland characteristics and the relationship between plant distribution and microtopography. Typical sandy alpine grassland distributed in hilly sloped lands, floodplains, foothills, and gully areas were selected as four sampling locations and sampled using four sampling lines for a total of 60 samples. Analyses were performed by using winTwin 2.3, Canoco 5.0, and Excel 2013 software. The species composition of the investigated community was simple, with 29 species grouped into 27 genera and 16 families. The occurrence of Leymus secalinus, Heteropappus altaicus, and Corispermum declinatum indicated that desertification of alpine grassland is in progress, and the vegetation community was successional to the direction of xeric. Species standard frequency distribution varied with different microtopography, the proportion of dominant species was generally lower than that of rare species, and the vegetation community was in a highly successional stage. We identified seven associations through TWINSPAN: Ass I. L. secalinus + H. altaicus + Saussurea woodiana,Ass Ⅱ. L. secalinus + Kobresia royleana + C. declinatum, Ass Ⅲ. L. secalinus+Elymus dahuricus +Ajania tenuifolia, Ass IV. L. secalinus +Thermopsis alpine, Ass V. E. sibiricus+Poa annua, Ass VI. Elymus sibiricus+E. dahuricus, Ass Ⅶ. C. declinatum. The distribution of the seven associations in the DCA ordination graph showed certain regularity. The results of the CCA ordination reflected that slope and aspect are the dominant factors among microtopography in the species distribution of sandy alpine grassland.
中文关键词	长江源区 ; 沙化 ; 高寒草地 ; 群落特征 ; 微地貌
英文关键词	source of the Yangtze River sandy alpine grassland community characteristics microtopography
语种	中文
国家	中国
收录类别	CSCD
WOS类目	BIOLOGY
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:6419042
来源机构	甘肃省治沙研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239403
作者单位	1.中国科学院西北生态环境资源研究院;;甘肃省治沙研究所;;中国科学院西北生态环境资源研究院,敦煌戈壁荒漠与环境研究站;;中国科学院大学, 中国科学院沙漠与沙漠化重点实验室;;荒漠化与风沙灾害防治国家重点实验室培育基地;;;;, 兰州;;兰州;;敦煌;;, ;;;;;;北京 730010;;730070;;736200;;100049; 2.中国科学院西北生态环境资源研究院;;中国科学院西北生态环境资源研究院,敦煌戈壁荒漠与环境研究站, 中国科学院沙漠与沙漠化重点实验室;;, 兰州;;敦煌, ;; 730010;;736200; 3.甘肃省治沙研究所, 荒漠化与风沙灾害防治国家重点实验室培育基地, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	赵鹏,屈建军,徐先英,等. 长江源区沙化高寒草地植被群落特征及其与地形因子的关系[J]. 甘肃省治沙研究所,2019,39(3):1030-1040.
APA	赵鹏.,屈建军.,徐先英.,唐进年.,韩庆杰.,...&赖俊华.(2019).长江源区沙化高寒草地植被群落特征及其与地形因子的关系.生态学报,39(3),1030-1040.
MLA	赵鹏,et al."长江源区沙化高寒草地植被群落特征及其与地形因子的关系".生态学报 39.3(2019):1030-1040.