干旱区生态环境知识资源中心(Arid): Assessing spatial patterns of soil erosion in a high-latitude rangeland

Arid

DOI	10.1002/ldr.3585
	Assessing spatial patterns of soil erosion in a high-latitude rangeland
	Streeter, Richard T.; Cutler, Nick A.
通讯作者	Streeter, RT
来源期刊	LAND DEGRADATION & DEVELOPMENT
ISSN	1085-3278
EISSN	1099-145X
出版年	2020
卷号	31 期号:15 页码:2003-2018
英文摘要	High-latitude areas are experiencing rapid change: we therefore need a better understanding of the processes controlling soil erosion in these environments. We used a spatiotemporal approach to investigate soil erosion in Svalbarostunga, Iceland (66 degrees N, 15 degrees W), a degraded rangeland. We used three complementary datasets: (a) high-resolution unmanned-aerial vehicle imagery collected from 12 sites (total area similar to 0.75 km(2)); (b) historical imagery of the same sites; and (c) a simple, spatially-explicit cellular automata model. Sites were located along a gradient of increasing altitude and distance from the sea, and varied in erosion severity (5-47% eroded). We found that there was no simple relationship between location along the environmental gradient and the spatial characteristics of erosion. Patch-size frequency distributions lacked a characteristic scale of variation, but followed a power-law distribution on five of the 12 sites. Present total eroded area is poorly related to current, site-scale levels of environmental stress, but the number of small erosion patches did reflect site-level stress. Small (<25 m(2)) erosion patches clustered near large patches. The model results suggested that the large-scale patterns observed likely arise from strong, local interactions, which mean that erosion spreads from degraded areas. Our findings suggest that contemporary erosion patterns reflect historical stresses, as well as current environmental conditions. The importance of abiotic processes to the growth of large erosion patches and their relative insensitivity to current environmental conditions makes it likely that the total eroded area will continue to increase, despite a warming climate and reducing levels of grazing pressure.
英文关键词	cellular automata grazing Iceland patch-size distributions sheep soil erosion UAV
类型	Article
语种	英语
开放获取类型	Green Submitted, Bronze, Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000562565300001
WOS关键词	POSITIVE INTERACTIONS ; CATASTROPHIC SHIFTS ; ECOLOGICAL IMPACTS ; VEGETATION ; SHEEP ; DESERTIFICATION ; ICELAND ; CARBON
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325817
作者单位	[Streeter, Richard T.] Univ St Andrews, Sch Geog & Sustainable Dev, St Andrews, Fife, Scotland; [Cutler, Nick A.] Newcastle Univ, Sch Geog Polit & Sociol, Newcastle Upon Tyne, Tyne & Wear, England
推荐引用方式 GB/T 7714	Streeter, Richard T.,Cutler, Nick A.. Assessing spatial patterns of soil erosion in a high-latitude rangeland[J],2020,31(15):2003-2018.
APA	Streeter, Richard T.,&Cutler, Nick A..(2020).Assessing spatial patterns of soil erosion in a high-latitude rangeland.LAND DEGRADATION & DEVELOPMENT,31(15),2003-2018.
MLA	Streeter, Richard T.,et al."Assessing spatial patterns of soil erosion in a high-latitude rangeland".LAND DEGRADATION & DEVELOPMENT 31.15(2020):2003-2018.