Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.agrformet.2014.04.010 |
Water use efficiency threshold for terrestrial ecosystem carbon sequestration in China under afforestation | |
Gao, Yang1,2; Zhu, Xianjin1; Yu, Guirui1; He, Nianpeng1; Wang, Qiufeng1; Tian, Jing1 | |
通讯作者 | Yu, Guirui |
来源期刊 | AGRICULTURAL AND FOREST METEOROLOGY
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ISSN | 0168-1923 |
EISSN | 1873-2240 |
出版年 | 2014 |
卷号 | 195页码:32-37 |
英文摘要 | Forests play a vital role in global carbon (C) cycling. Accordingly, afforestation engineering programs that promote increased terrestrial C stocks are an important means to help gradually decrease atmospheric CO2 emissions. China, however, had increased its afforested area bordering hydroclimatic zones to 275.71 million hm(2) between 1949 and 2010. Ecosystem water use efficiency (EWUE) and plant water use efficiency (PVVUE) provide data on ecosystem sensitivity to water availability across rainfall regimes. The water consumption cost of C sequestration (WCCC) is also an important parameter that gauges the cost of C sequestration under afforestation. However, abrupt changes in EWUE and PWUE (threshold values of 1.5 and 3.6 gC kg(-1) H2O, respectively) have been measured within the 400-500 mm precipitation climatic isoline boundary situated between semi-humid and arid zones. The threshold value of the corresponding WCCC was 1.0 kg H2O gC(-1). Forest ecosystems in China typically generate high EVVUE and PWUE values (2.80 +/- 0.77 and 4.25 +/- 1.02 gC kg(-1) H2O, respectively) but low WCCC values (0.52 +/- 0.42 kg H2O g(-1) C), providing proof that afforestation is the best choice in increasing terrestrial C stocks. However, China’s major afforestation engineering programs have concentrated efforts toward low EWUE and PWUE and high WCCC in the western region of the 400-500 mm precipitation isoline boundary, belonging to the arid and semiarid zones, which introduced potential environmental risks. Therefore, policies related to large-scale C sequestration initiatives under afforestation must first fully consider the statuses of WCCC and WUE. (C) 2014 Elsevier B.V. All rights reserved. |
英文关键词 | Water use efficiency C sequestration Afforestation Precipitation isoline Threshold value Climatic zone |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000339216600004 |
WOS关键词 | FOREST ECOSYSTEMS ; SEMIARID AREAS ; EASTERN CHINA ; NITROGEN ; SCALE ; PRODUCTIVITY ; ENVIRONMENT ; LIMITATION ; RESPONSES ; PATTERNS |
WOS类目 | Agronomy ; Forestry ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Agriculture ; Forestry ; Meteorology & Atmospheric Sciences |
来源机构 | 中国科学院地理科学与资源研究所 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/180495 |
作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China; 2.Purdue Univ, USDA ARS, Natl Soil Eros Res Lab, W Lafayette, IN 47907 USA |
推荐引用方式 GB/T 7714 | Gao, Yang,Zhu, Xianjin,Yu, Guirui,et al. Water use efficiency threshold for terrestrial ecosystem carbon sequestration in China under afforestation[J]. 中国科学院地理科学与资源研究所,2014,195:32-37. |
APA | Gao, Yang,Zhu, Xianjin,Yu, Guirui,He, Nianpeng,Wang, Qiufeng,&Tian, Jing.(2014).Water use efficiency threshold for terrestrial ecosystem carbon sequestration in China under afforestation.AGRICULTURAL AND FOREST METEOROLOGY,195,32-37. |
MLA | Gao, Yang,et al."Water use efficiency threshold for terrestrial ecosystem carbon sequestration in China under afforestation".AGRICULTURAL AND FOREST METEOROLOGY 195(2014):32-37. |
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