Moisture-driven changes in the sensitivity of the radial growth of Picea crassifolia to temperature,northeastern Tibetan Plateau |
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| Institution: | 1. Center for Ecological Research, Northeast Forestry University, Harbin 150040, China;2. Key Laboratory of Sustainable Forest Ecosystem Management, Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, China;3. Key Laboratory of Forest Ecology and Environment, State Forestry Administration, Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China;4. State Key Laboratory of Urbanand Regional Ecology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, China;5. Heilongjiang Institute of Meteorological Science, Harbin 150030, China;1. Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration of China, Beijing, 100091, China;2. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;4. Academy of Water Resource Conservation Forests of Qilian Mountains in Gansu Province, Zhangye, 734000, China;1. Beijing Key Laboratory of Traditional Chinese Medicine Protection and Utilization, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China;2. Key Laboratory of Land Consolidation and Rehabilitation, Land Consolidation and Rehabilitation Center, Ministry of Natural Resources, Beijing, 100035, China;3. State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China;4. State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, 100081, China;5. Department of Biostatistics and Epidemiology, School of Public Health and Health Sciences, University of Massachusetts Amherst, Amherst, MA, 01003, USA;1. Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China;2. Mathematical Methods and Information Technology Department, Siberian Federal University, L. Prushinskoi street, 2, Krasnoyarsk, 660075, Russia;3. V.N Sukachev Institute of Forest SB RAS, Laboratory of Tree-Ring Structure, 660036 Krasnoyarsk, Russia;4. Institute of Geography, University of Erlangen-Nürnberg, 91054 Erlangen, Germany;1. Center for Ecological Research, Northeast Forestry University, Harbin, 150040, China;2. Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin, 150040, China;3. Heilongjiang Institute of Meteorological Science, Harbin, 150030, China;4. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China;5. Key Lab of Forest Ecology and Environment, State Forestry Administration, Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing, 100091, China;6. Department of Life Science, Henan University, Kaifeng, 475001, China;1. School of Geography and Tourism, Shaanxi Normal University, Xi’an 710119, China;2. State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;3. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China;1. State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, No. 19, Xinjiekouwai Street, Haidian District, Beijing 100875, China;2. College of Resources Science and Technology, Beijing Normal University, No. 19, Xinjiekouwai Street, Haidian District, Beijing 100875, China;3. College of Geography and Environment Science, Northwest Normal University, No. 967, Anning East Road, Lanzhou 730070, China;4. Department of Mathematics and Statistics, Boston University, 111 Cummington Mall, Boston, MA 02215, USA |
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| Abstract: | Precipitation is one of the most important climate factors controlling tree growth, yet it is not fully understood how changes in precipitation affect the relationship between growth and temperature. On the northeastern edge of the Tibetan Plateau, nine tree-ring chronologies of Picea crassifolia were developed along a precipitation gradient from semi-arid (mean annual precipitation, 255 mm) to semi-humid (710 mm). We analyze the growth-climate relationships along this precipitation gradient and assess whether these associations are regulated by local precipitation. From 1960 to 2014, temperature increased significantly while precipitation remained stable at the nine sampling sites. The radial growth of P. crassifolia decreased at the semi-arid sites but increased at the semi-humid sites. Growth-temperature relationships gradually changed from negative to positive along the precipitation gradient (from dry to wet sites), particularly during summer. The moist P. crassifolia sites are also characterized by positive correlations with the Palmer Drought Severity Index. The temporal growth-temperature relationships varied significantly among the different spruce sites over the last five decades. Although temperature remains the main factor controlling the growth of P. crassifolia, local precipitation variability is becoming increasingly important. Our findings indicate that considering species distribution areas supports the analyses of the impact of climate change on tree growth. |
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| Keywords: | Climate change Tree rings Growth-Temperature relationships Precipitation gradient Tibetan Plateau |
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