Arid
DOI10.1016/j.catena.2020.104460
Land use conversion influences soil respiration across a desert-oasis ecoregion in Northwest China, with consideration of cold season CO2 efflux and its significance
Zhang, Yongyong1; Zhao, Wenzhi1; Fu, Li1; Zhao, Chun1,2; Jia, Angyuan1,2
通讯作者Zhang, Yongyong
来源期刊CATENA
ISSN0341-8162
EISSN1872-6887
出版年2020
卷号188
英文摘要Quantifying annual soil CO2 emissions and the effects of physical and geochemical factors on soil CO2 efflux will improve the carbon budget estimates, as well as enhance predictions of how soil CO2 emission will response to climate change in arid areas. To data, variability in soil respiration rates caused by land use conversion in the desert-oasis ecoregion of Northwest China remains poorly characterized, especially the contribution of cold season (November-February) CO2 emission. Soil respiration was measured in a Haloxylon ammodendron desert shrubland, a Zea mays cropland, a Populus gansuensis forest, and a Tamarix chinensis Lour wetland using a LI-COR 8100 Soil Respiration Observation System from April 2016 to March 2019. Annual soil CO2 emissions totaled 176, 778, 918, and 397 g Cm--(2) in the desert shrubland, cropland, forest, and wetland, respectively. The ratio of cold season CO2 emissions to the annual varied from 6 to 15% across ecosystems. Therefore, ignoring cold season CO2 emissions would lead to underestimates of carbon losses in the desert-oasis ecoregion. The soil respiration rate at 10 degrees C was influenced by soil organic carbon content in all four ecosystems. In the cropland and forest, soil respiration rate was affected by the interaction of soil moisture and soil temperature, while in the wetland and desert shrubland, soil respiration was sensitive to a single factor, soil temperature. Land use conversion induced differences in organic matter accumulation, soil temperature, and soil moisture, and as a consequence, produced variability in soil respiration rates across the desert-oasis ecoregion.
英文关键词Soil CO2 efflux Soil temperature Soil moisture Soil organic carbon Arid areas
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000518488500032
WOS关键词CARBON-DIOXIDE FLUXES ; WATER-CONTENT ; TEMPERATURE SENSITIVITY ; NITROGEN DEPOSITION ; PRECIPITATION ; EMISSIONS ; RESPONSES ; NORTHERN ; ECOSYSTEMS ; PATTERNS
WOS类目Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向Geology ; Agriculture ; Water Resources
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/314239
作者单位1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Linze Inland River Basin Res Stn, Lanzhou 730000, Peoples R China;
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Zhang, Yongyong,Zhao, Wenzhi,Fu, Li,et al. Land use conversion influences soil respiration across a desert-oasis ecoregion in Northwest China, with consideration of cold season CO2 efflux and its significance[J],2020,188.
APA Zhang, Yongyong,Zhao, Wenzhi,Fu, Li,Zhao, Chun,&Jia, Angyuan.(2020).Land use conversion influences soil respiration across a desert-oasis ecoregion in Northwest China, with consideration of cold season CO2 efflux and its significance.CATENA,188.
MLA Zhang, Yongyong,et al."Land use conversion influences soil respiration across a desert-oasis ecoregion in Northwest China, with consideration of cold season CO2 efflux and its significance".CATENA 188(2020).
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