干旱区生态环境知识资源中心(Arid): Changes in distribution and morphology of Tamarix ramosissima nebkhas in an oasis-desert ecotone

Arid

DOI	10.1007/s12303-020-0054-3
	Changes in distribution and morphology of Tamarix ramosissima nebkhas in an oasis-desert ecotone
	Li, Chaofan; Yang, Fan; Zheng, Xinqian; Han, Zhangyong; Pan, Honglin; Zhou, Chenglong; Ji, Chunrong
通讯作者	Yang, F (corresponding author), China Meteorol Adm, Inst Desert Meteorol, 327 Jianguo Rd, Urumqi 830002, Peoples R China.
来源期刊	GEOSCIENCES JOURNAL
ISSN	1226-4806
EISSN	1598-7477
出版年	2021
英文摘要	In the oasis-desert ecotone, nebkhas are of great importance for blocking the intrusion of shifting sand and maintaining the ecological security of oases. The morphological characteristics of nebkhas have been widely researched. However, their spatial distribution and morphological variation with the environment remain unclear. In this paper, we systematically analyzed the spatial distribution pattern, morphological changes, and potential indicative significance of Tamarix ramosissima nebkhas (that is, nebkhas formed around T. ramosissima) in a typical oasis-desert ecotone in Northwest China. Our results showed that the intensity of aeolian activities increased from the inside to the outside of the ecotone, and only T. ramosissima shrubs with high tolerance to aeolian activities could survive. Moreover, from the inside to the outside of the ecotone, the density of the T. ramosissima nebkhas decreased, their size increased, and spatial distribution shifted from aggregation to random. The T. ramosissima shrub can trap aeolian transport and protect nebkhas, leading to sand accumulation in the space between, and leeward edges of, the shrubs. Wind erosion mainly occurs to the windward side and along the sides of the nebkhas. Further, the protective effect of the shrub gradually increased with its growth in a year, resulting in the gradually changed of nebkha surface from wind erosion to sand accumulation, and the nebkha volume showed a fluctuating state of first decreasing and then increasing. This indicates that wind erosion and sand accumulation on the nebkha surface were closely related to the growth cycle of the shrub. In addition, nebkhas exhibited a spatial pattern of growth, inside of the ecotone, to degradation, outside of the ecotone. These results indicate that we should focus on the outside of the ecotone to ensure the ecological stability of oases.
英文关键词	oasis-desert ecotone Tamarix ramosissima nebkha spatial pattern morphological characteristics erosion/accumulation
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000605557800002
WOS关键词	LAND DEGRADATION ; SPATIAL-PATTERN ; WIND EROSION ; INDICATORS ; DEPOSITION ; SEDIMENT ; DYNAMICS ; NITRARIA ; HISPIDA ; MARGIN
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
来源机构	南京信息工程大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/352212
作者单位	[Li, Chaofan] Nanjing Univ Informat Sci & Technol, Sch Geog Sci, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing 210044, Peoples R China; [Yang, Fan; Pan, Honglin; Zhou, Chenglong] China Meteorol Adm, Inst Desert Meteorol, Taklimakan Desert Meteorol Field Expt Stn, Urumqi 830002, Peoples R China; [Zheng, Xinqian; Ji, Chunrong] Xinjiang Agrometeorol Observ, Urumqi 830002, Xinjiang, Peoples R China; [Han, Zhangyong] China Acad Transportat Sci, Urumqi 830002, Xinjiang, Peoples R China
推荐引用方式 GB/T 7714	Li, Chaofan,Yang, Fan,Zheng, Xinqian,et al. Changes in distribution and morphology of Tamarix ramosissima nebkhas in an oasis-desert ecotone[J]. 南京信息工程大学,2021.
APA	Li, Chaofan.,Yang, Fan.,Zheng, Xinqian.,Han, Zhangyong.,Pan, Honglin.,...&Ji, Chunrong.(2021).Changes in distribution and morphology of Tamarix ramosissima nebkhas in an oasis-desert ecotone.GEOSCIENCES JOURNAL.
MLA	Li, Chaofan,et al."Changes in distribution and morphology of Tamarix ramosissima nebkhas in an oasis-desert ecotone".GEOSCIENCES JOURNAL (2021).