Arid
DOI10.1016/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
ISSN0168-1923
EISSN1873-2240
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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