The effects of grazing and watering on ecosystem CO2 fluxes vary by community phenology
文献类型：期刊论文
| 作者 | Han, Juanjuan1; Li, Linghao1 ; Chu, Housen4; Miao, Yuan5; Chen, Shiping1; Chen, Jiquan3
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| 刊名 | ENVIRONMENTAL RESEARCH
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| 出版日期 | 2016 |
| 卷号 | 144页码:64-71 |
| 关键词 | Human disturbances Phenology Carbon Desert steppe Grazing Water |
| ISSN号 | 0013-9351 |
| DOI | 10.1016/j.envres.2015.09.002 |
| 文献子类 | Article |
| 英文摘要 | Grazing profoundly influences vegetation and the subsequent carbon fluxes in various ecosystems. However, little effort has been made to explore the underlying mechanisms for phenological changes and their consequences on carbon fluxes at ecosystem level, especially under the coupled influences of human disturbances and climate change. Here, a manipulative experiment (2012-2013) was conducted to examine both the independent and interactive effects of grazing and watering on carbon fluxes across phenological phases in a desert steppe. Grazing advanced or delayed phenological timing, leading to a shortened green-up phase (GrP: 23.60 days) in 2013 and browning phase (BrP: 12.48 days) in 2012 from high grazing, and insignificant effects on the reproductive phase (Rep) in either year. High grazing significantly enhance carbon uptake, while light grazing reduce carbon uptake in ReP. Watering only delayed the browning time by 5.01 days in 2013, producing no significant effects on any phenophase. Watering promoted the net ecosystem exchange (NEE), ecosystem respiration (ER), and gross ecosystem productivity (GEP) only in the GrP. When calculating the yearly differences in phenophases and the corresponding carbon fluxes, we found that an extended GrP greatly enhanced NEE, but a prolonged ReP distinctly reduced it. The extended GrP also significantly promote GEP. Increases in growing season length appeared promoting ER, regardless of any phenophase. Additionally, the shifts in NEE appeared dependent of the variations in leaf area index (LAI). (C) 2015 Elsevier Inc. All rights reserved. |
| 学科主题 | Environmental Sciences ; Public, Environmental & Occupational Health |
| 出版地 | SAN DIEGO |
| 电子版国际标准刊号 | 1096-0953 |
| WOS关键词 | CARBON SEQUESTRATION ; FLOWERING PHENOLOGY ; CHANGING CLIMATE ; PLANT-GROWTH ; LAND-COVER ; SOIL ; EVAPOTRANSPIRATION ; RESPIRATION ; RESPONSES ; DROUGHT |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| 语种 | 英语 |
| WOS记录号 | WOS:000366443200007 |
| 出版者 | ACADEMIC PRESS INC ELSEVIER SCIENCE |
| 资助机构 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31500403, 31229001] ; NSFNational Science Foundation (NSF) [1313761] ; China Postdoctoral Science FoundationChina Postdoctoral Science Foundation |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/25235]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Nanjing Univ Informat Sci & Technol, Int Ctr Ecol Meteorol & Environm, Nanjing 210044, Jiangsu, Peoples R China 2.Henan Univ, Coll Life Sci, China & State Key Lab Cotton Biol, Key Lab Plant Stress Biol, Kaifeng 475004, Henan, Peoples R China 3.Chinese Acad Sci, Inst Bot, Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 4.Michigan State Univ, CGCEO Geog, E Lansing, MI 48824 USA 5.Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA |
| 推荐引用方式 GB/T 7714 | Han, Juanjuan,Li, Linghao,Chu, Housen,et al. The effects of grazing and watering on ecosystem CO2 fluxes vary by community phenology[J]. ENVIRONMENTAL RESEARCH,2016,144:64-71. |
| APA | Han, Juanjuan,Li, Linghao,Chu, Housen,Miao, Yuan,Chen, Shiping,&Chen, Jiquan.(2016).The effects of grazing and watering on ecosystem CO2 fluxes vary by community phenology.ENVIRONMENTAL RESEARCH,144,64-71. |
| MLA | Han, Juanjuan,et al."The effects of grazing and watering on ecosystem CO2 fluxes vary by community phenology".ENVIRONMENTAL RESEARCH 144(2016):64-71. |
入库方式： OAI收割
来源：植物研究所
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