Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s10533-017-0372-3 |
The concurrent use of novel soil surface microclimate measurements to evaluate CO2 pulses in biocrusted interspaces in a cool desert ecosystem | |
Tucker, Colin L.1; McHugh, Theresa A.1,2; Howell, Armin1; Gill, Richard3; Weber, Bettina4; Belnap, Jayne1![]() | |
通讯作者 | Tucker, Colin L. |
来源期刊 | BIOGEOCHEMISTRY
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ISSN | 0168-2563 |
EISSN | 1573-515X |
出版年 | 2017 |
卷号 | 135期号:3页码:239-249 |
英文摘要 | Carbon cycling associated with biological soil crusts, which occupy interspaces between vascular plants in drylands globally, may be an important part of the coupled climate-carbon cycle of the Earth system. A major challenge to understanding CO2 fluxes in these systems is that much of the biotic and biogeochemical activity occurs in the upper few mm of the soil surface layer (i.e., the ’mantle of fertility’), which exhibits highly dynamic and difficult to measure temperature and moisture fluctuations. Here, we report a multi-sensor approach to simultaneously measuring temperature and moisture of this biocrust surface layer (0-2 mm), and the deeper soil profile, concurrent with automated measurement of surface soil CO2 effluxes. Our results illuminate robust relationships between biocrust water content and field CO2 pulses that have previously been difficult to detect and explain. All observed CO2 pulses over the measurement period corresponded to surface wetting events, including when the wetting events did not penetrate into the soil below the biocrust layer (0-2 mm). The variability of temperature and moisture of the biocrust surface layer was much greater than even in the 0-5 cm layer of the soil beneath the biocrust, or deeper in the soil profile. We therefore suggest that coupling surface measurements of biocrust moisture and temperature to automated CO2 flux measurements may greatly improve our understanding of the climatic sensitivity of carbon cycling in biocrusted interspaces in our study region, and that this method may be globally relevant and applicable. |
英文关键词 | Biological soil crusts Carbon cycle Drylands Pulse-dynamic wetting Soil respiration Surface soil moisture |
类型 | Article |
语种 | 英语 |
国家 | USA ; Germany |
收录类别 | SCI-E |
WOS记录号 | WOS:000411147100004 |
WOS关键词 | TEMPERATURE SENSITIVITY ; SEMIARID ECOSYSTEMS ; CLIMATE-CHANGE ; PRECIPITATION ; WATER ; RESPIRATION ; DECOMPOSITION ; VARIABILITY ; FEEDBACKS |
WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary |
WOS研究方向 | Environmental Sciences & Ecology ; Geology |
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/2XILL650/197798 |
作者单位 | 1.US Geol Survey, Southwest Biol Sci Ctr, Moab, UT 84532 USA; 2.Colorado Mesa Univ, Dept Biol Sci, Grand Junction, CO 81501 USA; 3.Brigham Young Univ, Dept Biol, Provo, UT 84602 USA; 4.Max Planck Inst Chem, Multiphase Chem Dept, Mainz, Germany |
推荐引用方式 GB/T 7714 | Tucker, Colin L.,McHugh, Theresa A.,Howell, Armin,et al. The concurrent use of novel soil surface microclimate measurements to evaluate CO2 pulses in biocrusted interspaces in a cool desert ecosystem[J]. United States Geological Survey,2017,135(3):239-249. |
APA | Tucker, Colin L..,McHugh, Theresa A..,Howell, Armin.,Gill, Richard.,Weber, Bettina.,...&Reed, Sasha C..(2017).The concurrent use of novel soil surface microclimate measurements to evaluate CO2 pulses in biocrusted interspaces in a cool desert ecosystem.BIOGEOCHEMISTRY,135(3),239-249. |
MLA | Tucker, Colin L.,et al."The concurrent use of novel soil surface microclimate measurements to evaluate CO2 pulses in biocrusted interspaces in a cool desert ecosystem".BIOGEOCHEMISTRY 135.3(2017):239-249. |
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