干旱区生态环境知识资源中心(Arid): Plant Phenology of High-Elevation Meadows: Assessing Spectral Responses of Grazed Meadows

Arid

DOI	10.1016/j.rama.2022.12.001
	Plant Phenology of High-Elevation Meadows: Assessing Spectral Responses of Grazed Meadows
	Snyder, Keirith A.; Richardson, William; Browning, Dawn M.; Lieurance, Wade; Stringham, Tamzen K.
通讯作者	Snyder, KA
来源期刊	RANGELAND ECOLOGY & MANAGEMENT
ISSN	1550-7424
EISSN	1551-5028
出版年	2023
卷号	87 页码:69-82
英文摘要	Groundwater-dependent ecosystems are biologically diverse and productive ecosystems but constitute a small fraction of total land area in semiarid regions. Efforts to link remotely sensed data from satellite-based platforms to measurements of vegetation structure and function at smaller spatial scales have increasingly received attention, due to the need to manage diverse landscapes at scales relevant to management. In the semiarid western United States, grazing is a dominant land use and meadows can receive a high degree of grazing pressure. In this study we examined satellite-based and near-surface imagery to determine if they were useful in assessing grazed systems with different grazing management. We compared meadows that were chronically grazed by feral horses in conjunction with periodic cattle grazing to a meadow managed and grazed by cattle only. We examined the agreement between near-surface digital cameras (PhenoCams) and satellite-based indices of greenness and production for meadows in the Central Great Basin, United States. We also verified them with field-collected data on percent foliar cover by dominant functional groups. There was strong agreement between the Landsat normalized difference vegetation index and PhenoCam Green Chromatic Coordinate (GCC) (Pearson's r >= 0.61). Gross primary production modeled using Landsat satellite imagery and integrated over the growing season had a strong linear relationship with GCC integrated over the growing season (R-2 = 0.89). Furthermore, despite differences in spatial and temporal resolution, integrated metrics from both platforms were able to discern differences in grazing pressure. Meadows with chronic feral horse grazing plus 3 mo of livestock grazing had reduced integrated gross primary production and GCC in comparison with a meadow that had short-term grazing (for 2 mo) by livestock only. The ability to detect differences in grazed systems from PhenoCams and satellite platforms provides important tools for quantifying the effects of grazing in groundwater-dependent ecosystems. Published by Elsevier Inc. on behalf of The Society for Range Management. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
英文关键词	grazing management gross primary production (GPP) groundwater-dependent ecosystems Landsat NDVI PhenoCam GCC
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000949005200008
WOS关键词	GREAT-BASIN ; FERAL HORSES ; VEGETATION ; CLIMATE ; ECOSYSTEM ; MANAGEMENT ; LANDSAT ; COVER ; DESERTIFICATION ; CONSEQUENCES
WOS类目	Ecology ; Environmental Sciences
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/2XILL650/398212
推荐引用方式 GB/T 7714	Snyder, Keirith A.,Richardson, William,Browning, Dawn M.,et al. Plant Phenology of High-Elevation Meadows: Assessing Spectral Responses of Grazed Meadows[J],2023,87:69-82.
APA	Snyder, Keirith A.,Richardson, William,Browning, Dawn M.,Lieurance, Wade,&Stringham, Tamzen K..(2023).Plant Phenology of High-Elevation Meadows: Assessing Spectral Responses of Grazed Meadows.RANGELAND ECOLOGY & MANAGEMENT,87,69-82.
MLA	Snyder, Keirith A.,et al."Plant Phenology of High-Elevation Meadows: Assessing Spectral Responses of Grazed Meadows".RANGELAND ECOLOGY & MANAGEMENT 87(2023):69-82.