干旱区生态环境知识资源中心(Arid): 月尺度视角下荒漠草原植物群落特征对降水变化的响应

Arid

	月尺度视角下荒漠草原植物群落特征对降水变化的响应
其他题名	Response of plant community characteristics to precipitation change in desert steppe from a monthly-scale perspective
	郭亚飞; 张丽华; 赵锐锋; 谢忠奎; 王军锋; 蒿廉伊; 高江平; 王梦梦; 高晗
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2021
卷号	40 期号:7 页码:1000-4890
中文摘要	降水是半干旱荒漠草原生态系统最主要的水分来源之一,生长季降雨量的变化直接影响植物生长,改变物种间关系,进而影响植物群落的结构和功能。本研究以黄土高原西部荒漠草原为对象,开展了3年的生长季降雨控制试验(- 40%,-20%,CK,+ 20%和 +40%),通过月尺度视角来探究降水变化对植物群落密度、高度、盖度、功能型组成、优势物种重要值及物种多样性的影响。结果表明:相比于增水处理,极端减水处理(-40%)对半干旱荒漠草原植物群落密度、高度和盖度的影响显著(P<0.05),且降水处理的效应在植物生长季中后期(7月、8月和9月)明显强于前期(5月和6月),7月和8月的降水对半干旱区荒漠草原植被的生长最为关键;极端减水处理导致植物群落结构发生改变,群落中短花针矛重要值增加,而灌木亚菊重要值降低,极端减水处理导致禾本科植物的优势度增加; 3年极端减水处理导致群落的物种丰富度和多样性水平有降低趋势,不利于植物群落的稳定发展;连续的极端增水处理(+40%)导致物种丰富度高于其他处理,并与减水处理组形成显著差异(P<0.05) 。基于未来降水格局变化不断加剧的背景,在生长季内不同时期对荒漠草原进行更实时的管理控制,对于生态环境敏感区的植被保护和稳定性维持具有重要的意义。
英文摘要	Precipitation is one of the most important water sources in semi-arid desert steppe. The changes of rainfall in growing season directly affect plant growth,interspecific relationship,and thus the structure and function of plant community. In this study,a three-year rainfall manipulation experiment (-40%,-20%,0 (CK),+20%,+40% rainfall in growing season) was carried out in the desert steppe in the west of the Loess Plateau,to explore the effects of precipitation change on density,height,coverage,functional type composition,the importance value of dominant species,and species diversity of plant communities from the perspective of monthly scale. It was found that: (1) compared with the increasing rainfall treatments,there were significant effects of extreme reducing rainfall (-40%) on the density,height and coverage of plant communities (P< 0.05),with such effects being significantly stronger in the middle and late growing season (July,August and September) than in the early growing season (May and June). The rainfall in July and August was the key factor driving plant growth in the semi-arid area. (2) Extreme rainfall reduction altered plant community structure by increasing the importance value of Stipa breviflora and decreasing that of Ajania fruticulosa. Extreme rainfall reduction increased the dominance of Gramineae species. (3) The three-year extreme rainfall reduction decreased plant species richness and diversity,which was not conducive to the stability of plant community. However, the continuous extreme rainfall increasing treatment (+ 40%) resulted in higher species richness than other treatments,and had significant difference with the precipitation reduction treatments (P < 0.05). Under the scenario of changes in precipitation regime,more real-time management of desert steppe in different periods during the growing season is of great significance for vegetation protection and stability maintenance in ecologically sensitive areas.
中文关键词	生长特征 ; 植物功能型 ; 物种多样性 ; 资源利用策略 ; 半干旱区
英文关键词	growth characteristics plant functional type species diversity resource utilization strategy semi-arid area
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:7010581
来源机构	西北师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/365266
作者单位	郭亚飞, 西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国.; 张丽华, 西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国.; 赵锐锋, 西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国.; 王军锋, 西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国.; 蒿廉伊, 西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国.; 高江平, 西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国.; 王梦梦, 西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国.; 高晗, 西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国.; 谢忠奎, 中国科学院西北生态环境资源研究院皋兰生态与农业综合试验站, 兰州, 甘肃 730000, 中国.
推荐引用方式 GB/T 7714	郭亚飞,张丽华,赵锐锋,等. 月尺度视角下荒漠草原植物群落特征对降水变化的响应[J]. 西北师范大学,2021,40(7):1000-4890.
APA	郭亚飞.,张丽华.,赵锐锋.,谢忠奎.,王军锋.,...&高晗.(2021).月尺度视角下荒漠草原植物群落特征对降水变化的响应.生态学杂志,40(7),1000-4890.
MLA	郭亚飞,et al."月尺度视角下荒漠草原植物群落特征对降水变化的响应".生态学杂志 40.7(2021):1000-4890.