Drought differentially affects autotrophic and heterotrophic soil respiration rates and their temperature sensitivity
文献类型：期刊论文
| 作者 | Sun, Shouqin1,2 ; Lei, Haiqing2,3; Chang, Scott X.2,4
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| 刊名 | BIOLOGY AND FERTILITY OF SOILS
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| 出版日期 | 2019-04-01 |
| 卷号 | 55期号:3页码:275-283 |
| ISSN号 | 0178-2762 |
| 关键词 | Autotrophic respiration Drought Heterotrophic respiration Soil respiration Soil water content tipping point Temperature sensitivity of soil respiration (Q(10)) |
| DOI | 10.1007/s00374-019-01347-w |
| 通讯作者 | Chang, Scott X.(sxchang@ualberta.ca) |
| 英文摘要 | Climate change predictions indicate that extreme drought is likely to become more frequent in the future. In this study, the impact of drought on soil respiration (R-s) and its autotrophic (R-a) and heterotrophic components (R-h) were studied in a cultivated Black Chernozemic soil in central Alberta, Canada. The mean R-s was 24.4% lower in the drought relative to the plots with ambient precipitation (P<0.001), with a larger decrease in R-a (26.8%) relative to R-h (21.0%), and a higher (P<0.05) contribution of R-h to R-s under drought (52.8%) than under the ambient condition (47.7%). Both R-s and its R-a and R-h components had an exponential relationship with soil temperature and a quadratic relationship with soil water content. Drought caused a greater decrease in the tipping point of soil water content for R-h (a 39.6% reduction) than for R-a (a 15.1% reduction) relative to the ambient precipitation treatment. In addition, drought resulted in a greater increase in the temperature sensitivity (Q(10) values) of R-a (a 45.0% increase) than that of R-h (a 14.1% increase) relative to the ambient precipitation treatment. The results suggest that drought amplified the water limitation effect on CO2 emission, especially that from microbial respiration, and resulted in a tighter relationship between temperature and root or autotrophic respiration, based on this 1-year study. We conclude that it is important to assess the impact of drought on soil respiration components rather than the total soil respiration, and such differential effects of drought on soil respiration components should be incorporated into global carbon circulation models. |
| WOS关键词 | CARBON-DIOXIDE ; CO2 EFFLUX ; MICROBIAL CONTRIBUTIONS ; SUMMER DROUGHT ; NITROUS-OXIDE ; WATER-STRESS ; ELEVATED CO2 ; RAIN-FOREST ; STAND AGE ; CLIMATE |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:000461142200008 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/25300]  |
| 专题 | 中国科学院水利部成都山地灾害与环境研究所 |
| 通讯作者 | Chang, Scott X. |
| 作者单位 | 1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, 9,Block 4,South Renmin Rd, Chengdu 610041, Sichuan, Peoples R China 2.Univ Alberta, Dept Renewable Resources, 442 Earth Sci Bldg, Edmonton, AB T6G 2E3, Canada 3.Zhejiang Subtrop Crop Res Inst, Wenzhou 325005, Peoples R China 4.Zhejiang A&F Univ, State Key Lab Subtrop Silviculture, Hangzhou 311300, Zhejiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Shouqin,Lei, Haiqing,Chang, Scott X.. Drought differentially affects autotrophic and heterotrophic soil respiration rates and their temperature sensitivity[J]. BIOLOGY AND FERTILITY OF SOILS,2019,55(3):275-283. |
| APA | Sun, Shouqin,Lei, Haiqing,&Chang, Scott X..(2019).Drought differentially affects autotrophic and heterotrophic soil respiration rates and their temperature sensitivity.BIOLOGY AND FERTILITY OF SOILS,55(3),275-283. |
| MLA | Sun, Shouqin,et al."Drought differentially affects autotrophic and heterotrophic soil respiration rates and their temperature sensitivity".BIOLOGY AND FERTILITY OF SOILS 55.3(2019):275-283. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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