干旱区生态环境知识资源中心(Arid): 水盐梯度下荒漠植物多样性格局及其与土壤环境的关系

Arid

	水盐梯度下荒漠植物多样性格局及其与土壤环境的关系
其他题名	Diversity patterns and response mechanisms of desert plants to the soil environment along soil water and salinity gradients
	张雪妮 1; 杨晓东 2; 吕光辉1
来源期刊	生态学报
ISSN	1000-0933
出版年	2016
卷号	36 期号:11 页码:3206-3215
中文摘要	植物多样性格局作为生物多样性维持的一个重要方面可揭示群落构建的信息,反映物种对环境的适应性。结合样带调查和实验分析的方法,研究新疆艾比湖湿地自然保护区内水盐梯度下荒漠植物多样性格局及其与土壤环境因子间关系。结果表明: (1)高、低水盐样地(SW1,SW2)土壤容积含水量(SVWC)和电导率(EC)分别为16.65%和12.02 mS /cm及2.63%和1.91 mS /cm,水盐变化主要影响草本和部分灌木群落的植物组成; (2)高水盐生境下植物群落无明显趋势性分布,低水盐生境下植物种依水盐和营养元素呈区域性分布。(3)高水盐生境下荒漠植物的多度分布呈对数正态模型,低水盐条件下符合Zipf模型,多度分布的变化反映了群落组成结构的水盐梯度响应; (4) SW1样地多样性总体显著高于SW2样地,土壤pH、SVWC和硫(S)对植物多样性有不同程度的极显著影响。综上可知,荒漠植物分布及多样性格局与土壤环境间关系呈一定的水盐梯度响应规律,本研究可为该地区植被恢复和土壤盐渍化治理提供科学依据。
英文摘要	Diversity patterns play an important role in identifying the mechanisms of biodiversity maintenance. The soil of the Ebinur Lake Wetland Nature Reserve located in the western margin of the Gurbantonggut Desert,in the Xinjiang Uygur Autonomous Region of China,is short in water and rich in salinity. These regional conditions result in plants that have developed high sensitivity and vulnerability characteristics. Thus,the exploration of desert plant diversity patterns and response mechanisms along various soil water and salinity gradients can integrate community-wide information to reveal the mechanisms of plant adaptations in an arid region and provide scientific strategies for reserve management and biodiversity conservation. However,plant diversity patterns and responses to varying gradients of soil water and salinity in the Ebinur Lake remain unclear. In the present study,three transects were first established that were perpendicular to the north bank of the Aqikesu River (one of three rivers in the Ebinur Lake Wetland Nature Reserve). In each of the three transects,10-12 plots (total of 32 plots) were set. The geographic data,abundance,richness,and soil volume water content (SVWC) were surveyed and recorded in each plot. The soil samples were then collected and taken to the Key Laboratory of Oasis Ecology of Xinjiang University. All soil samples were air dried,and soil pH (pH),electrical conductivity (EC),soil organic carbon (C),soil total nitrogen (N),soil total phosphorus (P),and soil total sulfur (S) of all samples were measured in the laboratory. Based on these values,abundance models,multiple comparisons,ordination analysis,and the regression method were used to explore plant abundance distributions,plant diversity patterns,and relationships with the soil environment across soil water and salinity gradients. The results showed that: (1) SVWC and EC in high (SW1) and low (SW2) soil water and salinity plots were 16.65% and 12.02 mS /cm; and 2.63% and 1.91 mS /cm,respectively. Species composition of herb and some shrub communities were mainly influenced by the variation in soil water and salinity. (2) The plant distribution pattern showed no significant relationship with soil environmental factors in SW1 plots; whereas in SW2 plots,significant variations were noted with SVWC,EC,and soil nutrient content,which presented a pattern of regional distribution. (3) Plant abundance patterns were fitted using the lognormal (LN) and Zipf models for SW1 and SW2, respectively. Variability in plant abundance patterns indicated the responses of community composition and structure to soil water and salinity in arid desert conditions. (4) Plant diversity in SW1 was significantly higher than that in SW2. To some extent,this diversity was significantly affected by soil pH,SVWC,and S. Overall,the relationships between distribution and diversity patterns,and the soil environment showed some response patterns to soil water and salinity gradients. In addition,the responses of a plant community to the soil environment across soil water and salinity gradients can provide reference points for the control of vegetation restoration and soil salinization under arid desert conditions.
中文关键词	多度分布 ; 多样性格局 ; 水盐梯度 ; 荒漠植物 ; 土壤营养含量
英文关键词	abundance distribution diversity pattern soil water and salinity gradients desert plants soil nutrition content
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:5725139
来源机构	新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234777
作者单位	1.新疆大学干旱生态环境研究所, 绿洲生态教育部重点实验室, 乌鲁木齐, 新疆 830046, 中国; 2.新疆大学资源与环境科学学院, 绿洲生态教育部重点实验室, 乌鲁木齐, 新疆 830046, 中国
推荐引用方式 GB/T 7714	张雪妮,杨晓东,吕光辉. 水盐梯度下荒漠植物多样性格局及其与土壤环境的关系[J]. 新疆大学,2016,36(11):3206-3215.
APA	张雪妮,杨晓东,&吕光辉.(2016).水盐梯度下荒漠植物多样性格局及其与土壤环境的关系.生态学报,36(11),3206-3215.
MLA	张雪妮,et al."水盐梯度下荒漠植物多样性格局及其与土壤环境的关系".生态学报 36.11(2016):3206-3215.