干旱区生态环境知识资源中心(Arid): Long-Term Response of Floodplain Meadow Normalized Difference Vegetation Index to Hydro-Climate and Grazing Pressure: Tamir River Plains, Mongolia

Arid

DOI	10.3390/land13060781
	Long-Term Response of Floodplain Meadow Normalized Difference Vegetation Index to Hydro-Climate and Grazing Pressure: Tamir River Plains, Mongolia
	Nyamjav, Lkhaakhuu; Nergui, Soninkhishig; Gantumur, Byambakhuu; Zorigt, Munkhtsetseg; Jansson, Roland
通讯作者	Nergui, S
来源期刊	LAND
EISSN	2073-445X
出版年	2024
卷号	13 期号:6
英文摘要	The greenery of floodplain meadows in arid regions, such as Mongolia, is influenced by climate, hydrology, and land use. In this study, we analyzed the NDVI (Normalized Difference Vegetation Index) of two floodplain meadows located along the South Tamir and Tamir Rivers using LANDSAT images. Our goal was to observe NDVI spatial changes, variations, and mean values in mid-August every six years from 1991 to 2015 and to identify the factors driving these differences. To achieve this, we conducted variance analysis to identify changes in NDVI and implemented Principal Component Analysis to determine the influence of hydro-meteorological factors and grazing intensity. Our findings indicate a significant decrease in greenness, as measured by pixel-scale NDVI, during the late summer period. This decrease was consistently observed, except for a series of harsh winters that followed relatively dry summers, resulting in a disastrous event called dzud, which led to the death of livestock. The decrease in NDVI was amplified by lower precipitation in June, higher temperatures and wind speed in July, and increased precipitation in August, along with a higher frequency of days with convective rain. Our findings have important implications for managing grazing in Mongolia's grasslands, promoting sustainable land use, and mitigating sandstorms. The variance and average values of NDVI at the pixel level can serve as reliable markers of sustainable pasture management in areas where other vegetation measures are limited.
英文关键词	NDVI climate change hydro-climatic factors grazing intensity dzud events floodplains Mongolia
类型	Article
语种	英语
开放获取类型	gold
收录类别	SSCI
WOS记录号	WOS:001257012600001
WOS关键词	RIPARIAN VEGETATION ; LAND-USE ; DYNAMICS ; IMPACTS ; BASIN ; WIND ; INCREASE ; STREAMS ; REGIME ; PLANTS
WOS类目	Environmental Studies
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404805
推荐引用方式 GB/T 7714	Nyamjav, Lkhaakhuu,Nergui, Soninkhishig,Gantumur, Byambakhuu,et al. Long-Term Response of Floodplain Meadow Normalized Difference Vegetation Index to Hydro-Climate and Grazing Pressure: Tamir River Plains, Mongolia[J],2024,13(6).
APA	Nyamjav, Lkhaakhuu,Nergui, Soninkhishig,Gantumur, Byambakhuu,Zorigt, Munkhtsetseg,&Jansson, Roland.(2024).Long-Term Response of Floodplain Meadow Normalized Difference Vegetation Index to Hydro-Climate and Grazing Pressure: Tamir River Plains, Mongolia.LAND,13(6).
MLA	Nyamjav, Lkhaakhuu,et al."Long-Term Response of Floodplain Meadow Normalized Difference Vegetation Index to Hydro-Climate and Grazing Pressure: Tamir River Plains, Mongolia".LAND 13.6(2024).