干旱区生态环境知识资源中心(Arid): Changes in morphology and soil nutrient patterns of nebkhas in arid regions along a precipitation gradient

Arid

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 (corresponding author), 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.
来源期刊	SCIENCES IN COLD AND ARID REGIONS
ISSN	1674-3822
出版年	2021
卷号	13 期号:3 页码:256-267
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.
英文关键词	Nebkha morphology soil nutrient precipitation gradient arid and semi-arid lands
类型	Article
语种	英语
收录类别	ESCI
WOS记录号	WOS:000686565700006
WOS关键词	SPECIES RICHNESS ; PHYTOGENIC NEBKHAS ; CHIHUAHUAN DESERT ; PLATEAU ; CLIMATE ; STEPPES ; MOUNDS ; NABKHA ; KUWAIT ; DUNES
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364639
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],2021,13(3):256-267.
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),256-267.
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):256-267.