Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/eco.1875 |
Ecohydrological role of biological soil crusts across a gradient in levels of development | |
Whitney, Kristen M.1; Vivoni, Enrique R.1,2; Duniway, Michael C.3; Bradford, John B.4; Reed, Sasha C.3; Belnap, Jayne3![]() | |
通讯作者 | Whitney, Kristen M. |
来源期刊 | ECOHYDROLOGY
![]() |
ISSN | 1936-0584 |
EISSN | 1936-0592 |
出版年 | 2017 |
卷号 | 10期号:7 |
英文摘要 | Though biological soil crusts (biocrusts) form abundant covers in arid and semiarid regions, their competing effects on soil hydrologic conditions are rarely accounted for in models. This study presents the modification of a soil water balance model to account for the presence of biocrusts at different levels of development (LODs) and their impact on one-dimensional hydrologic processes during warm and cold seasons. The model is developed, tested, and applied to study the hydrologic controls of biocrusts in the context of a long-term manipulative experiment equipped with meteorological and soil moisture measurements in a Colorado Plateau ecosystem near Moab, Utah. The climate manipulation treatments resulted in distinct biocrust communities, and model performance with respect to soil moisture was assessed in experimental plots with varying LOD as quantified through a field-based roughness index (RI). Model calibration and testing yielded excellent comparisons to observations and smooth variations of biocrust parameters with RI approximated through simple regressions. The model was then used to quantify how LOD affects soil infiltration, evapotranspiration, and run-off under calibrated conditions and in simulation experiments with gradual modifications in biocrust porosity and hydraulic conductivity. Simulation results show that highly developed biocrusts modulate soil moisture nonlinearly with LOD by altering soil infiltration and buffering against evapotranspiration losses, with small impacts on run-off. The nonlinear and threshold variations of the soil water balance in the presence of biocrusts of varying LOD helps explain conflicting outcomes of various field studies and sheds light on the ecohydrological role of biocrusts in arid and semiarid ecosystems. |
英文关键词 | biocrust biological soil crust ecohydrology model Colorado Plateau manipulative experiment roughness index soil water balance South-western United States |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000412418300008 |
WOS关键词 | WATER-CONTROLLED ECOSYSTEMS ; WESTERN NEGEV DESERT ; HYDROLOGIC PROCESSES ; MOISTURE DYNAMICS ; COLORADO PLATEAU ; ACTIVE-ROLE ; STRESS ; ISRAEL ; MICROSTRUCTURE ; VEGETATION |
WOS类目 | Ecology ; Environmental Sciences ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Water Resources |
来源机构 | United States Geological Survey ; Arizona State University |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/198402 |
作者单位 | 1.Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ USA; 2.Arizona State Univ, Sch Sustainable Engn & Built Environm, Tempe, AZ USA; 3.US Geol Survey, Southwest Biol Sci Ctr, Moab, UT USA; 4.US Geol Survey, Southwest Biol Sci Ctr, Flagstaff, AZ 86001 USA |
推荐引用方式 GB/T 7714 | Whitney, Kristen M.,Vivoni, Enrique R.,Duniway, Michael C.,et al. Ecohydrological role of biological soil crusts across a gradient in levels of development[J]. United States Geological Survey, Arizona State University,2017,10(7). |
APA | Whitney, Kristen M.,Vivoni, Enrique R.,Duniway, Michael C.,Bradford, John B.,Reed, Sasha C.,&Belnap, Jayne.(2017).Ecohydrological role of biological soil crusts across a gradient in levels of development.ECOHYDROLOGY,10(7). |
MLA | Whitney, Kristen M.,et al."Ecohydrological role of biological soil crusts across a gradient in levels of development".ECOHYDROLOGY 10.7(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。