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Soil carbon dynamics following land-use change varied with temperature and precipitation gradients: evidence from stable isotopes
文献类型：期刊论文
| 作者 | Cheng, Xiaoli; Zhang, Quanfa; Dang, Haishan; Zhang, Kerong |
| 刊名 | GLOBAL CHANGE BIOLOGY
 |
| 出版日期 | 2015-07-01 |
| 卷号 | 21期号:7页码:2762-2772 |
| 关键词 | C isotopes deforestation land-use change reforestation soil C turnover soil organic matter decomposition |
| ISSN号 | 1354-1013 |
| DOI | 10.1111/gcb.12886 |
| 英文摘要 | Knowledge of soil organic matter (SOM) dynamics following deforestation or reforestation is essential for evaluating carbon (C) budgets and cycle at regional or global scales. Worldwide land-use changes involving conversion of vegetation with different photosynthetic pathways (e.g. C-3 and C-4) offer a unique opportunity to quantify SOM decomposition rate and its response to climatic conditions using stable isotope techniques. We synthesized the results from 131 sites (including 87 deforestation observations and 44 reforestation observations) which were compiled from 36 published papers in the literatures as well as our observations in China's Qinling Mountains. Based on the C-13 natural abundance analysis, we evaluated the dynamics of new and old C in top soil (0-20cm) following land-use change and analyzed the relationships between soil organic C (SOC) decomposition rates and climatic factors. We found that SOC decomposition rates increased significantly with mean annual temperature and precipitation in the reforestation sites, and they were not related to any climatic factor in deforestation sites. The mean annual temperature explained 56% of variation in SOC decomposition rates by exponential model (y=0.0014e(0.1395x)) in the reforestation sites. The proportion of new soil C increased following deforestation and reforestation, whereas the old soil C showed an opposite trend. The proportion of new soil C exceeded the proportion of old soil C after 45.4years' reforestation and 43.4years' deforestation, respectively. The rates of new soil C accumulation increased significantly with mean annual precipitation and temperature in the reforestation sites, yet only significantly increased with mean annual precipitation in the deforestation sites. Overall, our study provides evidence that SOC decomposition rates vary with temperature and precipitation, and thereby implies that global warming may accelerate SOM decomposition. |
| 资助项目 | National Natural Science Foundation of China[31200340] ; National Natural Science Foundation of China[31470499] ; National Natural Science Foundation of China[31130010] ; Chinese Academy of Sciences[XDA05060500] ; National Key Technology Research and Development Program[2011BAD31B02] |
| WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000356422500026 |
| 出版者 | WILEY-BLACKWELL |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/246]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Zhang, Kerong |
| 作者单位 | Chinese Acad Sci, Wuhan Bot Garden, Key Lab Aquat Bot & Watershed Ecol, Wuhan 430074, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cheng, Xiaoli,Zhang, Quanfa,Dang, Haishan,et al. Soil carbon dynamics following land-use change varied with temperature and precipitation gradients: evidence from stable isotopes[J]. GLOBAL CHANGE BIOLOGY,2015,21(7):2762-2772. |
| APA | Cheng, Xiaoli,Zhang, Quanfa,Dang, Haishan,&Zhang, Kerong.(2015).Soil carbon dynamics following land-use change varied with temperature and precipitation gradients: evidence from stable isotopes.GLOBAL CHANGE BIOLOGY,21(7),2762-2772. |
| MLA | Cheng, Xiaoli,et al."Soil carbon dynamics following land-use change varied with temperature and precipitation gradients: evidence from stable isotopes".GLOBAL CHANGE BIOLOGY 21.7(2015):2762-2772. |
入库方式： OAI收割
来源：武汉植物园
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