干旱区生态环境知识资源中心(Arid): 敦煌阳关湿地芦苇克隆构件空间拓展策略及其对土壤环境因子的响应

Arid

	敦煌阳关湿地芦苇克隆构件空间拓展策略及其对土壤环境因子的响应
其他题名	Spatial expansion strategy and soil environmental response of the clonal architectures for Phragmites australis in Yangguan wetland of Dunhuang
	焦亮; 刘雪蕊; 王圣杰; 董小刚
来源期刊	生态学报
ISSN	1000-0933
出版年	2019
卷号	39 期号:14 页码:5317-5325
中文摘要	空间拓展是克隆植物响应环境的生态适应和权衡维度,以内陆盐沼湿地典型代表敦煌阳关国家级自然保护区内的芦苇(Phragmites alphaustralis)为研究对象,基于水库距离远近和芦苇种群的密度与盖度,设置了近水区(500 m)、过渡区(1500 m)、荒漠区(2500 m)3个不同的采样梯度,研究了环境异质条件下芦苇克隆构件空间拓展策略及其对土壤环境因子的响应。结果表明:(1)芦苇克隆构件在异质环境条件下差异显著,初级根茎条数、根茎节间长、间隔子长、分枝角度呈现同增同涨的协同进化关系(P<0.01),而与分株数呈现此消彼长的权衡关系(P<0.01)。(2)且随着种群的密度降低,芦苇在空间拓展过程中呈现从密集型转游击型的生存策略。(3)冗余分析显示土壤水分、PH值、盐分是克隆构件空间拓展的主要驱动力,其中各层土壤水分、深层土壤PH值和盐分是芦苇空间拓展最重要的环境因子。明晰内陆河湿地芦苇克隆构件空间拓展策略及主要的环境驱动力,能为干旱脆弱敏感区湿地保护和生态恢复提供借鉴意义。
英文摘要	Spatial expansion is the ecological adaptation and trade-off decision of clonal plants in response to the environment. In order to study the spatial expansion strategy of clonal architectures and its response to soil environmental factors under heterogeneous conditions,Phragmites australis in Yangguan National Nature Reserve ( Dunhuang,China) with a typical inland salt marsh wetland was selected as the research object. Three different sampling sites including near water zone (500 m),transition zone (1500 m) and desert zone (2500 m) were set up. The results showed that: (1) The features of the clonal architectures of Phragmites australis differed significantly in heterogeneous environment,and the coevolutionary relationship of architectures showed significantly positive correlation with the primary rhizome number,rhizome internode length, spacer length and branch angle (P<0.01) , and negative correlation with the ramet number ( P<0.01). (2) Phragmites australis presented a survival strategy from "phalanx" to "guerrilla" during spatial expansion with gradual decreases of population density. (3) Soil water, pH value and salt were the main driving forces of spatial expansion of clonal architectures based on redundancy analysis. Specifically, water in each soil layer, pH value and salt in deep soil were the most important soil environmental factors driving the spatial expansion of Phragmites australis. This study provides a scientific basis and case reference for protection management and ecological restoration of inland river wetlands.
中文关键词	芦苇 ; 克隆构件 ; 空间拓展 ; 生态适应 ; 内陆盐沼湿地
英文关键词	Phragmites australis clonal architecture spatial expansion ecological adaptation inland salt marsh wetlands
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:6545116
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/2XILL650/239462
作者单位	西北师范大学地理与环境科学学院, 甘肃省湿地资源保护与产业发展工程研究中心, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	焦亮,刘雪蕊,王圣杰,等. 敦煌阳关湿地芦苇克隆构件空间拓展策略及其对土壤环境因子的响应[J]. 西北师范大学,2019,39(14):5317-5325.
APA	焦亮,刘雪蕊,王圣杰,&董小刚.(2019).敦煌阳关湿地芦苇克隆构件空间拓展策略及其对土壤环境因子的响应.生态学报,39(14),5317-5325.
MLA	焦亮,et al."敦煌阳关湿地芦苇克隆构件空间拓展策略及其对土壤环境因子的响应".生态学报 39.14(2019):5317-5325.