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DOI	10.3724/SP.J.1226.2021.20058
	Changes in morphology and soil nutrient patterns of nebkhas in arid regions along a precipitation gradient
	Luo, WeiCheng; Zhao, WenZhi; Liu, Bing; Ren, Heng
通讯作者	Zhao, WZ (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Linze Inland River Basin Res Stn,Chinese Ecosyst, 318 West Donggang Rd, Lanzhou 730000, Gansu, Peoples R China.
发表日期	2021
ISSN	1674-3822
起始页码	256
结束页码	267
卷号	13 期号:3
英文摘要	Nebkhas, discrete mounds of sand and vegetation, are a common landscape feature critical to the stability of desert ecosystems and supported by limited precipitation. Nebkha morphology and spatial pattern vary in landscapes, but it is unclear how they change along precipitation gradients in arid and semi-arid regions. In this study we determined morphology and soil nutrient patterns of nebkha from different regions of northwestern China. The objective of this study was to understand zonal differences among nebkhas and how morphological characteristics and soil nutrient patterns of nebkha change along a precipitation gradient in northwestern China. Our results shows that mean annual precipitation (MAP) had significant effects on morphological characteristics of nebkhas such as height, area, and volume which significantly decreased with an increase in MAP. MAP had significant positive effects on shrub cover and species richness of nebkha. Soil nutrients such as soil organic matter (SOM), total carbon (TC), total nitrogen (TN), and total phosphorus (TP) in the 0-10 cm layer increased with an increase of MAP, and soil nutrient content within nebkhas was higher than in inter-nebkha areas. We concluded that nebkhas are fertile islands with an important role in ecosystem dynamics in study regions. Further, MAP is a key factor which determined zonal differences, morphological, and soil nutrients patterns of nebkhas. However, disturbance, such as animal grazing, and planted sand-stabilizing vegetation accelerated the degeneration of nebkha landscapes. We recommend implementation of protective measures for nebkhas in arid and semi-arid areas of China.
关键词	SPECIES RICHNESS PHYTOGENIC NEBKHAS CHIHUAHUAN DESERT PLATEAU CLIMATE STEPPES MOUNDS NABKHA KUWAIT DUNES
英文关键词	Nebkha; morphology; soil nutrient; precipitation gradient; arid and semi-arid lands
语种	英语
WOS研究方向	Physical Geography
WOS类目	Geography, Physical
WOS记录号	WOS:000686565700006
来源期刊	SCIENCES IN COLD AND ARID REGIONS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254021
作者单位	[Luo, WeiCheng; Zhao, WenZhi; Liu, Bing; Ren, Heng] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Linze Inland River Basin Res Stn,Chinese Ecosyst, 318 West Donggang Rd, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Luo, WeiCheng,Zhao, WenZhi,Liu, Bing,et al. Changes in morphology and soil nutrient patterns of nebkhas in arid regions along a precipitation gradient[J]. 中国科学院西北生态环境资源研究院,2021,13(3).
APA	Luo, WeiCheng,Zhao, WenZhi,Liu, Bing,&Ren, Heng.(2021).Changes in morphology and soil nutrient patterns of nebkhas in arid regions along a precipitation gradient.SCIENCES IN COLD AND ARID REGIONS,13(3).
MLA	Luo, WeiCheng,et al."Changes in morphology and soil nutrient patterns of nebkhas in arid regions along a precipitation gradient".SCIENCES IN COLD AND ARID REGIONS 13.3(2021).