干旱区生态环境知识资源中心(Arid): Long-Term Declining Trends in Chihuahuan Desert Forage Production in Relation to Precipitation and Ambient Temperature

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DOI	10.1016/j.rama.2019.06.002
	Long-Term Declining Trends in Chihuahuan Desert Forage Production in Relation to Precipitation and Ambient Temperature
	McIntosh, Matthew M.1; Holechek, Jerry L.1; Spiegal, Sheri A.2; Cibils, Andres F.1; Estell, Richard E.2
通讯作者	Holechek, Jerry L.
来源期刊	RANGELAND ECOLOGY & MANAGEMENT
ISSN	1550-7424
EISSN	1551-5028
出版年	2019
卷号	72 期号:6 页码:976-987
英文摘要	Rising temperatures and more frequent droughts are posing new challenges to range livestock producers in the southwestern United States and many other parts of the world. We analyzed a 52-yr time series (1967-2018) of precipitation, ambient temperature, and perennial grass production (PGP), as well as 14 yr (2001-2014) of Moderate Resolution Imaging Spectrometer (MODIS)-derived vegetation phenometrics at a site in the Chihuahuan Desert of New Mexico. PGP was positively associated with December through September precipitation (r = 0.69; P < 0.01) but negatively associated with spring and summer (May-September) maximum average ambient temperature (r = -0.47; P < 0.01). PGP decreased by 43% in the second (1993-2018) compared with the first half (1967-1992) of our study (165 vs. 94 kg dry matter . ha(-1); P < 0.01). Precipitation was lower and more erratic in the second half of the time series, decreasing by 18.6% (265.2 +/- 15.0 vs. 215.8 +/- 15.8 mm; P = 0.01). Conversely, mean maximum and mean ambient temperatures were higher during the 1993-2018 period (max T: 24.5 +/- 0.1 vs. 25.3 +/- 0.1 degrees C; P < 0.01; mean T:14.4 +/- 0.1 vs. 15.3 +/- 0.2 degrees C; P < 0.01). MODIS-derived Normalized Difference Vegetation Index (NDVI) analysis showed that growing seasons began and ended later and became shorter (P < 0.05) over the 14 yr analyzed. During this period, increasing maximum spring and summer (May-September) ambient temperatures were associated with decreasing growing season NDVI values (P < 0.01). Over the 52-yr study period, Chihuahuan Desert rangelands at our research site lost 43% of grazing capacity based on PGP. Nine drought yr occurred in the second half of our study compared with 2 yr in the first half. Our research supports predictions by climate scientists that higher temperatures, more frequent droughts, and lower, as well as more erratic, precipitation will adversely impact grazing capacity of rangelands in the southwestern United States. (C) 2019 The Society for Range Management. Published by Elsevier Inc. All rights reserved.
英文关键词	climate change forage grazing capacity NDVI phenometrics
类型	Article
语种	英语
国家	USA
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000497319000013
WOS关键词	CLIMATE-CHANGE ; VEGETATION ; RANGELANDS ; VARIABILITY ; GROWTH ; CATTLE ; TIME
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
EI主题词	2019-11-01
来源机构	New Mexico State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310453
作者单位	1.New Mexico State Univ, Dept Anim & Range Sci, Las Cruces, NM 88003 USA; 2.USDA ARS, Jornada Expt Range, Las Cruces, NM 88003 USA
推荐引用方式 GB/T 7714	McIntosh, Matthew M.,Holechek, Jerry L.,Spiegal, Sheri A.,et al. Long-Term Declining Trends in Chihuahuan Desert Forage Production in Relation to Precipitation and Ambient Temperature[J]. New Mexico State University,2019,72(6):976-987.
APA	McIntosh, Matthew M.,Holechek, Jerry L.,Spiegal, Sheri A.,Cibils, Andres F.,&Estell, Richard E..(2019).Long-Term Declining Trends in Chihuahuan Desert Forage Production in Relation to Precipitation and Ambient Temperature.RANGELAND ECOLOGY & MANAGEMENT,72(6),976-987.
MLA	McIntosh, Matthew M.,et al."Long-Term Declining Trends in Chihuahuan Desert Forage Production in Relation to Precipitation and Ambient Temperature".RANGELAND ECOLOGY & MANAGEMENT 72.6(2019):976-987.