Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.ecocom.2013.12.002 |
Modeling the grazing effect on dry grassland carbon cycling with Biome-BGC model | |
Han, Qifei1,2; Luo, Geping1; Li, Chaofan1,2; Xu, WenQiang1 | |
通讯作者 | Luo, Geping |
来源期刊 | ECOLOGICAL COMPLEXITY |
ISSN | 1476-945X |
EISSN | 1476-9840 |
出版年 | 2014 |
卷号 | 17页码:149-157 |
英文摘要 | Identifying the factors that determine the carbon source/sink strength of ecosystems is important for reducing uncertainty in the global carbon cycle. Using the modified Biome-BGC grazing model, we modeled carbon dynamics in Xinjiang, Northwest China for grasslands that varied in grazing intensity. In general, this regional simulation estimated that the grassland ecosystems in Xinjiang acted as a net carbon source, with a value of 0.38 Pg C over the period 1979-2007. There were significant effects of grazing on carbon dynamics. An over-compensatory effect in net primary productivity (NPP) and vegetation carbon (C) stock was observed when grazing intensity was lower than 0.40 head/ha. Grazing resulted in a net carbon source of 23.45 g C m(-2) yr(-1), which equaled 0.37 Pg in Xinjiang in the last 29 years. In general, grazing decreased vegetation C stock, while an increasing trend was observed with low grazing intensity. The soil C increased significantly (17%) with long-term grazing, while the soil C stock exhibited a steady trend without grazing. These findings have implications for grassland ecosystem management as it relates to carbon sequestration and climate change mitigation, e.g., removal of grazing should be considered in strategies that aim to increase terrestrial carbon sequestrations at local and regional scales. One of the greatest limitations in quantifying the effects of herbivores on carbon cycling is identifying the grazing systems and intensities within a given region. We hope our study emphasizes the need for large-scale assessments of how grazing impacts carbon cycling. (C) 2013 Elsevier B.V. All rights reserved. |
英文关键词 | Grazing Carbon cycling Biome-BGC Grassland Arid |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000331679000015 |
WOS关键词 | NET PRIMARY PRODUCTION ; SOIL CARBON ; LITTER DECOMPOSITION ; ABOVEGROUND BIOMASS ; FLUX MEASUREMENTS ; SIMULATION-MODEL ; GROWTH-RESPONSES ; PASTURE CARBON ; HERBIVORY ; NITROGEN |
WOS类目 | Ecology |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | 中国科学院新疆生态与地理研究所 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/181648 |
作者单位 | 1.Chinese Acad Sci, State Key Lab Desert & Oasis Ecol, Xinjiang Inst Ecol & Geog, Urumqi 830011, Xinjiang, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Han, Qifei,Luo, Geping,Li, Chaofan,et al. Modeling the grazing effect on dry grassland carbon cycling with Biome-BGC model[J]. 中国科学院新疆生态与地理研究所,2014,17:149-157. |
APA | Han, Qifei,Luo, Geping,Li, Chaofan,&Xu, WenQiang.(2014).Modeling the grazing effect on dry grassland carbon cycling with Biome-BGC model.ECOLOGICAL COMPLEXITY,17,149-157. |
MLA | Han, Qifei,et al."Modeling the grazing effect on dry grassland carbon cycling with Biome-BGC model".ECOLOGICAL COMPLEXITY 17(2014):149-157. |
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