Arid
DOI10.1016/j.catena.2007.08.005
Spatial patterns of ecohydrologic properties on a hillslope-alluvial fan transect, central New Mexico
Bedford, David R.1,2; Small, Eric E.2
通讯作者Bedford, David R.
来源期刊CATENA
ISSN0341-8162
出版年2008
卷号73期号:1页码:34-48
英文摘要

Spatial patterns of soil properties are linked to patchy vegetation in and and semi-arid landscapes. The patterns of soil properties are generally assumed to be linked to the ecohydrological functioning of patchy dryland vegetation ecosystems. We studied the effects of vegetation canopy, its spatial pattern, and landforms on soil properties affecting overland flow and infiltration in shrublands at the Sevilleta National Wildlife Refuge/LTER in central New Mexico, USA. We studied the patterns of microtopography and saturated conductivity (Ksat), and generally found it to be affected by vegetation canopy and pattern, as well as landform type. On gently sloping alluvial fans, both microtopography and Ksat are high under vegetation canopy and decay with distance from plant center. On steeper hillslope landforms, only microtopography was significantly higher under vegetation canopy, while there was no significant difference in Ksat between vegetation and interspaces. Using geostatistics, we found that the spatial pattern of soil proper-ties was determined by the spatial pattern of vegetation. Most importantly, the effects of vegetation were present in the unvegetated interspaces 2-4 times the extent of vegetation canopy, on the order of 2-3 m. Our results have implications for the understanding the ecohydrologic function of semi-arid ecosystems as well as the parameterization of hydrologic models. (C) 2007 Elsevier B.V. All rights reserved.


英文关键词spatial patterns ecohydrology alluvial fans bajada hillslope vegetation soil properties
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000254829300004
WOS关键词SONORAN DESERT BAJADAS ; WEIGHTED LEAST-SQUARES ; VEGETATION PATTERNS ; SOIL PROPERTIES ; MULTIVARIATE GEOSTATISTICS ; INFILTRATION RATES ; CHIHUAHUAN DESERT ; SEMIARID WOODLAND ; SHRUB-STEPPE ; SINGLE-RING
WOS类目Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向Geology ; Agriculture ; Water Resources
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/2XILL650/156793
作者单位1.US Geol Survey, Menlo Pk, CA 94025 USA;
2.Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA
推荐引用方式
GB/T 7714
Bedford, David R.,Small, Eric E.. Spatial patterns of ecohydrologic properties on a hillslope-alluvial fan transect, central New Mexico[J]. United States Geological Survey,2008,73(1):34-48.
APA Bedford, David R.,&Small, Eric E..(2008).Spatial patterns of ecohydrologic properties on a hillslope-alluvial fan transect, central New Mexico.CATENA,73(1),34-48.
MLA Bedford, David R.,et al."Spatial patterns of ecohydrologic properties on a hillslope-alluvial fan transect, central New Mexico".CATENA 73.1(2008):34-48.
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