Arid
DOI10.1371/journal.pone.0121234
Changes in Spatial Patterns of Caragana stenophylla along a Climatic Drought Gradient on the Inner Mongolian Plateau
Xie, Li-Na1; Guo, Hong-Yu1; Gabler, Christopher A.2; Li, Qing-Fang1; Ma, Cheng-Cang1
通讯作者Ma, Cheng-Cang
来源期刊PLOS ONE
ISSN1932-6203
出版年2015
卷号10期号:3
英文摘要

Few studies have investigated the influence of water availability on plant population spatial patterns. We studied changes in the spatial patterns of Caragana stenophylla along a climatic drought gradient within the Inner Mongolian Plateau, China. We examined spatial patterns, seed density, "nurse effects" of shrubs on seedlings, transpiration rates and water use efficiency (WUE) of C. stenophylla across semi-arid, arid, and intensively arid zones. Our results showed that patches of C. stenophylla populations shifted from a random to a clumped spatial pattern towards drier environments. Seed density and seedling survival rate of C. stenophylla decreased from the semi-arid zone to the intensively arid zone. Across the three zones, there were more C. stenophylla seeds and seedlings underneath shrub canopies than outside shrub canopies; and in the intensively arid zone, there were almost no seeds or seedlings outside shrub canopies. Transpiration rates of outer-canopy leaves and WUE of both outer-canopy and inner-canopy leaves increased from the semi-arid zone to the intensively arid zone. In the intensively arid zone, transpiration rates and WUE of inner-canopy leaves were significantly lower and higher, respectively, than those of outer-canopy leaves. We conclude that, as drought stress increased, seed density decreased, seed proportions inside shrubs increased, and "nurse effects" of shrubs on seedlings became more important. These factors, combined with water-saving characteristics associated with clumped spatial patterns, are likely driving the changes in C. stenophylla spatial patterns.


类型Article
语种英语
国家Peoples R China ; USA
收录类别SCI-E
WOS记录号WOS:000352138500205
WOS关键词SOIL SEED BANK ; DESERT ; DYNAMICS ; ESTABLISHMENT ; FACILITATION ; POPULATIONS ; VEGETATION ; RESPONSES ; SAVANNA ; REGION
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/189734
作者单位1.Tianjin Normal Univ, Tianjin Key Lab Anim & Plant Resistance, Coll Life Sci, Tianjin, Peoples R China;
2.Univ Houston, Dept Biol & Biochem, Houston, TX 77204 USA
推荐引用方式
GB/T 7714
Xie, Li-Na,Guo, Hong-Yu,Gabler, Christopher A.,et al. Changes in Spatial Patterns of Caragana stenophylla along a Climatic Drought Gradient on the Inner Mongolian Plateau[J],2015,10(3).
APA Xie, Li-Na,Guo, Hong-Yu,Gabler, Christopher A.,Li, Qing-Fang,&Ma, Cheng-Cang.(2015).Changes in Spatial Patterns of Caragana stenophylla along a Climatic Drought Gradient on the Inner Mongolian Plateau.PLOS ONE,10(3).
MLA Xie, Li-Na,et al."Changes in Spatial Patterns of Caragana stenophylla along a Climatic Drought Gradient on the Inner Mongolian Plateau".PLOS ONE 10.3(2015).
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