干旱区生态环境知识资源中心(Arid): Monitoring Drought Impact on Annual Forage Production in Semi-Arid Grasslands: A Case Study of Nebraska Sandhills

Arid

DOI	10.3390/rs11182106
	Monitoring Drought Impact on Annual Forage Production in Semi-Arid Grasslands: A Case Study of Nebraska Sandhills
	Podebradska, Marketa 1,2; Wylie, Bruce K.3; Hayes, Michael J.1; Wardlow, Brian D.1,4; Bathke, Deborah J.1,2; Bliss, Norman B.3; Dahal, Devendra 5
通讯作者	Podebradska, Marketa
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2019
卷号	11 期号:18
英文摘要	Land management practices and disturbances (e.g. overgrazing, fire) have substantial effects on grassland forage production. When using satellite remote sensing to monitor climate impacts, such as drought stress on annual forage production, minimizing land management practices and disturbance effects sends a clear climate signal to the productivity data. This study investigates the effect of this climate signal by: (1) providing spatial estimates of expected biomass under specific climate conditions, (2) determining which drought indices explain the majority of interannual variability in this biomass, and (3) developing a predictive model that estimates the annual biomass early in the growing season. To address objective 1, this study uses an established methodology to determine Expected Ecosystem Performance (EEP) in the Nebraska Sandhills, US, representing annual forage levels after accounting for non-climatic influences. Moderate Resolution Imaging Spectroradiometer (MODIS)-based Normalized Difference Vegetation Index (NDVI) data were used to approximate actual ecosystem performance. Seventeen years (2000-2016) of annual EEP was calculated using piecewise regression tree models of site potential and climate data. Expected biomass (EB), EEP converted to biomass in kgha(-1)yr(-1), was then used to examine the predictive capacity of several drought indices and the onset date of the growing season. Subsets of these indices were used to monitor and predict annual expected grassland biomass. Independent field-based biomass production data available from two Sandhills locations were used for validation of the EEP model. The EB was related to field-based biomass production (R-2 = 0.66 and 0.57) and regional rangeland productivity statistics of the Soil Survey Geographic Database (SSURGO) dataset. The Evaporative Stress Index (ESI), the 3- and 6-month Standardized Precipitation Index (SPI), and the U.S. Drought Monitor (USDM), which represented moisture conditions during May, June and July, explained the majority of the interannual biomass variability in this grassland system (three-month ESI explained roughly 72% of the interannual biomass variability). A new model was developed to use drought indices from early in the growing season to predict the total EB for the whole growing season. This unique approach considers only climate-related drought signal on productivity. The capability to estimate annual EB by the end of May will potentially enable land managers to make informed decisions about stocking rates, hay purchase needs, and other management issues early in the season, minimizing their potential drought losses.
英文关键词	rangeland productivity remote sensing eMODIS NDVI rule-based piecewise regression tree drought forage production biomass prediction Sandhills
类型	Article
语种	英语
国家	USA
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000489101500036
WOS关键词	ECOSYSTEM PERFORMANCE ANOMALIES ; GREAT-PLAINS ; RIVER-BASIN ; EVAPORATIVE DEMAND ; UNITED-STATES ; TIME-SERIES ; NDVI ; VEGETATION ; SATELLITE ; COVER
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
来源机构	United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218417
作者单位	1.Univ Nebraska, Sch Nat Resources, 3310 Holdrege St, Lincoln, NE 68583 USA; 2.Univ Nebraska, Sch Nat Resources, Natl Drought Mitigat Ctr, 3310 Holdrege St,POB 830988, Lincoln, NE 68583 USA; 3.USGS, Earth Resources Observat & Sci EROS Ctr, 47914 252nd St, Sioux Falls, SD 57198 USA; 4.Univ Nebraska, Sch Nat Resources, Ctr Adv Land Management Informat Technol, 3310 Holdrege St, Lincoln, NE 68583 USA; 5.USGS, KBR, Earth Resources Observat & Sci EROS Ctr, 47914 252nd St, Sioux Falls, SD 57198 USA
推荐引用方式 GB/T 7714	Podebradska, Marketa,Wylie, Bruce K.,Hayes, Michael J.,et al. Monitoring Drought Impact on Annual Forage Production in Semi-Arid Grasslands: A Case Study of Nebraska Sandhills[J]. United States Geological Survey,2019,11(18).
APA	Podebradska, Marketa.,Wylie, Bruce K..,Hayes, Michael J..,Wardlow, Brian D..,Bathke, Deborah J..,...&Dahal, Devendra.(2019).Monitoring Drought Impact on Annual Forage Production in Semi-Arid Grasslands: A Case Study of Nebraska Sandhills.REMOTE SENSING,11(18).
MLA	Podebradska, Marketa,et al."Monitoring Drought Impact on Annual Forage Production in Semi-Arid Grasslands: A Case Study of Nebraska Sandhills".REMOTE SENSING 11.18(2019).