| Critical climate periods for grassland productivity on China's Loess Plateau | |
Guo, Liang1; Cheng, Jimin1; Luedeling, Eike2,3; Koerner, Sally E.4; He, Jin-Sheng5; Xu, Jianchu6,7 ; Gang, Chengcheng1; Li, Wei1; Luo, Ruimin8; Peng, Changhui1,9
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| 2017-02-15 | |
| 发表期刊 | AGRICULTURAL AND FOREST METEOROLOGY
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| 卷号 | 233期号:1页码:101-109 |
| 摘要 | Strong correlations between aboveground net primary productivity (ANPP) of grasslands and mean annual temperature or precipitation have been widely reported across regional or continental scales; however, inter-annual variation in these climate factors correlates poorly with site-specific ANPP. We hypothesize that the reason for these weak correlations is that the impacts of climatic variation on grassland productivity depend on the timing and intensity of variation in temperature and precipitation. In this study, long-term records of grassland productivity on the Loess Plateau in China were related with daily temperature and precipitation during 1992-2011 using Partial Least Squares (PLS) regression to test the above-mentioned hypothesis. Our results suggested that temperature increases during the early stage of the growing season (April-May) were positively correlated with ANPP. However, these effects were canceled out when this phase was followed by a hot and dry summer (June-July). Impacts of drought and heat in August on productivity were negligible. Increased temperature and precipitation during the senescence period (September-October) and a warmer dormancy phase (November-March) were negatively correlated with productivity in the following year, while precipitatibn during the dormancy period had no detectable effects. Climatic variability in summer has thus far been the dominant driver of temporal variation in grassland productivity. Warming during winter and spring currently play minor roles, but it seems likely that the importance of these secondary impacts may increase as warming trends continue. This evaluation of climate variability impacts on ecosystem function (e.g. grassland productivity) implies that not only the magnitude but also the timing of changes in temperature and precipitation determines how the impacts of climate changes on ecosystems will unfold. (C) 2016 Elsevier B.V. All rights reserved. |
| 关键词 | Aboveground Net Primary Productivity (Anpp) Partial Least Squares Regression (Pls) Precipitation Temperate Grassland Temperature Timing Of Climate Variability |
| DOI | 10.1016/j.agrformet.2016.11.006 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000393259400009 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.kib.ac.cn/handle/151853/41901 |
| 专题 | 资源植物与生物技术所级重点实验室 |
| 作者单位 | 1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Peoples R China 2.World Agroforestry Ctr, Nairobi 00100, Kenya 3.Univ Bonn, Ctr Dev Res ZEF, D-53113 Bonn, Germany 4.Univ S Florida, Dept Integrat Biol, Tampa, FL 33620 USA 5.Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Beijing 100871, Peoples R China 6.Chinese Acad Sci, Ctr Mt Ecosyst Studies, Kunming Inst Bot, Kunming 650201, Peoples R China 7.World Agroforestry Ctr, East & Cent Asia, Kunming 650201, Peoples R China 8.Northwest A&F Univ, Coll Anim Sci & Technol, Yangling 712100, Peoples R China 9.Univ Quebec Montreal, Dept Biol Sci, Inst Environm Sci, Montreal, PQ H3C 3P8, Canada |
| 推荐引用方式 GB/T 7714 | Guo, Liang,Cheng, Jimin,Luedeling, Eike,et al. Critical climate periods for grassland productivity on China's Loess Plateau[J]. AGRICULTURAL AND FOREST METEOROLOGY,2017,233(1):101-109. |
| APA | Guo, Liang.,Cheng, Jimin.,Luedeling, Eike.,Koerner, Sally E..,He, Jin-Sheng.,...&Peng, Changhui.(2017).Critical climate periods for grassland productivity on China's Loess Plateau.AGRICULTURAL AND FOREST METEOROLOGY,233(1),101-109. |
| MLA | Guo, Liang,et al."Critical climate periods for grassland productivity on China's Loess Plateau".AGRICULTURAL AND FOREST METEOROLOGY 233.1(2017):101-109. |
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