Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.2136/vzj2008.0052 |
Hydrologic Characterization of Desert Soils with Varying Degrees of Pedogenesis: 1. Field Experiments Evaluating Plant-Relevant Soil Water Behavior | |
Nimmo, John R.1; Perkins, Kim S.1; Schmidt, Kevin M.1; Miller, David M.1; Stock, Jonathan D.1; Singha, Kamini2 | |
通讯作者 | Nimmo, John R. |
来源期刊 | VADOSE ZONE JOURNAL
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ISSN | 1539-1663 |
出版年 | 2009 |
卷号 | 8期号:2页码:480-495 |
英文摘要 | To assess the effect of pedogenesis on the soil moisture dynamics influencing the character and quality of ecological habitat, we conducted infiltration and redistribution experiments on three alluvial deposits in the Mojave National Preserve: (i) recently deposited active wash sediments, (ii) a soil of early Holocene age, and (iii) a highly developed soil of late Pleistocene age. At each, we ponded water in a 1-m-diameter infiltration ring for 2.3 h and monitored soil water content and matric pressure during and after infiltration, using probes and electrical resistivity imaging (ERI). Infiltration and downward flow rates were greater in younger material, favoring deep-rooted species. Deep-rooted species tend to colonize the margins of washes, where they are unaffected by sediment transport that inhibits colonization. The ERI results support important generalizations, for example that shallower than 0.5 m, infiltrated water persists longer in highly developed soil, favoring shallow-rooted species. Soil moisture data for the two youngest soils suggested that saturation overshoot, which may have significant but unexplored hydroecologic and pedogenic effects,occurred at the horizontally advancing wetting front. Spatial heterogeneity of soil properties generally increased with pedogenic development. Evidence suggested that some early-stage developmental processes may promote uniformity; the inter-mediate-age soil appeared to have the least heterogeneity in terms of textural variation with depth, and also the least anisotropy. Lateral heterogeneity was pronounced in older soil, having a multitude of effects on the distribution and retention of soil water, and may facilitate certain water-conserving strategies of plants over what would be possible in a laterally homogeneous soil. |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000266297100021 |
WOS关键词 | MOJAVE DESERT ; RESISTIVITY TOMOGRAPHY ; HYDRAULIC CONDUCTIVITY ; FUNCTIONAL TYPES ; USA ; INFILTRATION ; MODEL ; DISTURBANCE ; CALIFORNIA ; INVERSION |
WOS类目 | Environmental Sciences ; Soil Science ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; 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/2XILL650/162769 |
作者单位 | 1.US Geol Survey, Menlo Pk, CA 94025 USA; 2.Penn State Univ, Dept Geosci, University Pk, PA 16802 USA |
推荐引用方式 GB/T 7714 | Nimmo, John R.,Perkins, Kim S.,Schmidt, Kevin M.,et al. Hydrologic Characterization of Desert Soils with Varying Degrees of Pedogenesis: 1. Field Experiments Evaluating Plant-Relevant Soil Water Behavior[J]. United States Geological Survey,2009,8(2):480-495. |
APA | Nimmo, John R.,Perkins, Kim S.,Schmidt, Kevin M.,Miller, David M.,Stock, Jonathan D.,&Singha, Kamini.(2009).Hydrologic Characterization of Desert Soils with Varying Degrees of Pedogenesis: 1. Field Experiments Evaluating Plant-Relevant Soil Water Behavior.VADOSE ZONE JOURNAL,8(2),480-495. |
MLA | Nimmo, John R.,et al."Hydrologic Characterization of Desert Soils with Varying Degrees of Pedogenesis: 1. Field Experiments Evaluating Plant-Relevant Soil Water Behavior".VADOSE ZONE JOURNAL 8.2(2009):480-495. |
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