Climate change increased the intrinsic water use efficiency of Larix gmelinii in permafrost degradation areas, but did not promote its growth
文献类型：期刊论文
| 作者 | Chen, Zecheng; Zhang, Yuandong; Li, Zongshan; Han, Shijie; Wang, Xiaochun |
| 刊名 | AGRICULTURAL AND FOREST METEOROLOGY
 |
| 出版日期 | 2022-06-01 |
| 卷号 | 320期号:0页码:108957 |
| 关键词 | CARBON-ISOTOPE DISCRIMINATION TREE-RING DELTA-C-13 PINUS-SYLVESTRIS RADIAL GROWTH FOREST ECOSYSTEMS ATMOSPHERIC CO2 NORWAY SPRUCE ELEVATED CO2 SCOTS PINE LARCH |
| ISSN号 | 0168-1923 |
| 英文摘要 | The degradation of permafrost caused by climate warming accelerates the infiltration and evaporation of water, destroys the hydrological system, and increases the drought stress of boreal forests. However, how climate warming and permafrost degradation affect intrinsic Water Use Efficiency (iWUE) and tree growth is not fully understood. Using tree-ring width and stable carbon isotope composition (delta C-13) data, we analyzed the growth and iWUE of Larix gmelinii on slopes and gullies in three different permafrost degradation areas in Daxing'an Mountains, China. The results showed that the iWUE of L. gmelinii increased significantly in all areas from 1900 to 2015. Radial growth and the ratio of intercellular (C-i) and ambient (Ca) CO2 concentration was significantly negatively correlated with temperature and positively correlated with Palmer Drought Severity Index (PDSI) in severe degradation permafrost areas. Meanwhile, radial growth (basal area increment, BAI) has decreased significantly in recent 40 years, and the decline rate of radial growth in slope topographies was higher than that in gully topographies. Growing season temperature was generally positively correlated with iWUE, but negatively correlated with the radial growth of L. gmelinii. The increase of iWUE was negatively correlated with the radial growth of L. gmelinii. The response of BAI, iWUE, and C-i/C-a to temperature rise and water change was weak in the mild degradation area, and radial growth still increased. In severe and moderate degradation areas, tree physiology (iWUE and C-i/C-a) was driven by temperature and PDSI, indicating that L. gmelinii adopted a conservative water-saving stomatal strategy, and increasing iWUE did not promote tree growth. Although the water use efficiency of L. gmelinii in the southern edge of permafrost area increased with the increase in temperature, it may face more serious drought stress and growth decline in the future. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47215]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 通讯作者 | Wang, Xiaochun |
| 作者单位 | 1.Northeast Forestry Univ, Sch Forestry, Key Lab Sustainable Forest Ecosyst Management, Minist Educ, Harbin 150040, Peoples R China 2.Henan Univ, Dept Life Sci, State Key Lab Cotton Biol, Kaifeng 475001, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 4.Chinese Acad Forestry, Res Inst Forest Ecol Environm & Protect, Grassland Adm, Beijing 100091, Peoples R China 5.Chinese Acad Forestry, Key Lab Forest Ecol & Environm Natl Forestry, Beijing 100091, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Zecheng,Zhang, Yuandong,Li, Zongshan,et al. Climate change increased the intrinsic water use efficiency of Larix gmelinii in permafrost degradation areas, but did not promote its growth[J]. AGRICULTURAL AND FOREST METEOROLOGY,2022,320(0):108957. |
| APA | Chen, Zecheng,Zhang, Yuandong,Li, Zongshan,Han, Shijie,&Wang, Xiaochun.(2022).Climate change increased the intrinsic water use efficiency of Larix gmelinii in permafrost degradation areas, but did not promote its growth.AGRICULTURAL AND FOREST METEOROLOGY,320(0),108957. |
| MLA | Chen, Zecheng,et al."Climate change increased the intrinsic water use efficiency of Larix gmelinii in permafrost degradation areas, but did not promote its growth".AGRICULTURAL AND FOREST METEOROLOGY 320.0(2022):108957. |
入库方式： OAI收割
来源：生态环境研究中心
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