Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/ecs2.2335 |
Soil water dynamics at 15 locations distributed across a desert landscape: insights from a 27-yr dataset | |
Duniway, Michael C.1; Petrie, Matthew D.2,3; Peters, Debra P. C.4; Anderson, John P.3,5; Crossland, Keith6; Herrick, Jeffrey E.4 | |
通讯作者 | Duniway, Michael C. |
来源期刊 | ECOSPHERE
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ISSN | 2150-8925 |
出版年 | 2018 |
卷号 | 9期号:7 |
英文摘要 | Desert ecosystems are primarily limited by water availability. Within a climatic regime, topography, soil characteristics, and vegetation are expected to determine how the combined effects of precipitation, temperature, and evaporative demand of the atmosphere shape the spatial and temporal patterns of water within the soil profile and across a landscape. To forecast how desert landscapes may respond to future dimatic conditions, it is imperative to improve our understanding of these ecohydrologic processes. Here, we report on 27 yr of monthly soil volumetric water content (VWC) measurements and associated soils data from a site in the northern Chihuahuan Desert of North America. The dataset includes VWC and soil properties measured to 3 m in depth across 15 locations that encompass a range of Chihuahuan Desert vegetation types. We use this unique dataset (1) to generate insights into general temporal and depth patterns in VWC, (2) to analyze how VWC corresponds to measures of climatic conditions, and (3) to qualitatively evaluate the relative importance of soils, topographic setting, and vegetation type in mediating temporal patterns in VWC. Analyses of this unique dataset emphasize the importance of soil and topographic setting in determining depth and temporal patterns in VWC across time. Results emphasize the episodic nature of deep wetting events in our study system-essentially limited to three large events over the 27-yr record driven primarily by wetter than normal winters. Comparison of soil water dynamics between mesquite shrub coppice dunes and interspace soils suggests the "island of fertility" concept does not extend to soil water. Median VWC was strongly coupled to climatic conditions over surprisingly long windows at most locations (6-18 months), suggesting that soil water at depth is decoupled from short climatic pulses. However, VWC dynamics and VWC-climate relationships varied among locations, depths, and seasons, with unexpected similarities in ecohydrologic dynamics observed among very different vegetation types (e.g., an eroded creosote shrubland and a playa grassland). These results further underscore the importance of ecohydrological investigations in these ecosystems, given forecasts for a warmer and more variable climate in deserts globally. |
英文关键词 | Chihuahuan Desert coppice dunes critical zone deep recharge desertification ecohydrology grassland landscape context neutron moisture meter shrubland soil water Special Feature: Dynamic Deserts vadose zone |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000441526900009 |
WOS关键词 | NORTHERN CHIHUAHUAN DESERT ; SOUTHERN NEW-MEXICO ; CREOSOTEBUSH LARREA-TRIDENTATA ; NET PRIMARY PRODUCTION ; SEMIARID GRASSLAND ; PRIMARY PRODUCTIVITY ; VEGETATION CHANGES ; FUNCTIONAL TYPES ; PLANT-RESPONSES ; CLIMATE-CHANGE |
WOS类目 | Ecology |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | United States Geological Survey ; New Mexico State University |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/208843 |
作者单位 | 1.US Geol Survey, Southwest Biol Sci Ctr, Moab, UT 84532 USA; 2.New Mexico State Univ, Dept Plant & Environm Sci, Las Cruces, NM 88003 USA; 3.New Mexico State Univ, Jornada Basin LTER Program, Las Cruces, NM 88003 USA; 4.New Mexico State Univ, USDA ARS Jornada Expt Range, Las Cruces, NM 88003 USA; 5.New Mexico State Univ, Jornada Expt Range Dept, Las Cruces, NM 88003 USA; 6.Nat Resources Conservat Serv, Richfield, UT 84701 USA |
推荐引用方式 GB/T 7714 | Duniway, Michael C.,Petrie, Matthew D.,Peters, Debra P. C.,et al. Soil water dynamics at 15 locations distributed across a desert landscape: insights from a 27-yr dataset[J]. United States Geological Survey, New Mexico State University,2018,9(7). |
APA | Duniway, Michael C.,Petrie, Matthew D.,Peters, Debra P. C.,Anderson, John P.,Crossland, Keith,&Herrick, Jeffrey E..(2018).Soil water dynamics at 15 locations distributed across a desert landscape: insights from a 27-yr dataset.ECOSPHERE,9(7). |
MLA | Duniway, Michael C.,et al."Soil water dynamics at 15 locations distributed across a desert landscape: insights from a 27-yr dataset".ECOSPHERE 9.7(2018). |
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