Rapid warming induces the contrasting growth of Yezo spruce (Picea jezoensis var. microsperma) at two elevation gradient sites of northeast China |
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| Affiliation: | 1. Center for Ecological Research, School of Forestry, Northeast Forestry University, Harbin, 150040, China;2. Department of Forest and Rangeland Stewardship, Colorado State University, Fort Collins, 80523, USA;1. National Research Institute of Rural Engineering, Water and Forestry (INRGREF), BP 10, Ariana, 2080, Tunisia;2. National institute of agronomy Tunis, BP 48, Tunis, 1082, Tunisia;3. Mediterranean Institute of Biodiversity and Ecology (IMBE), Aix Marseille University, Univ Avignon, CNRS, IRD, Arbois Mediterranean Europole, BP 80, 13 545 Aix en Provence Cedex 4, France;4. INRA, UR629, Ecology of Mediterranean Forests (URFM), Domaine Saint-Paul, 84 914, Avignon Cedex 9, France;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;1. Center for Ecological Research, College of Forestry, Northeast Forestry University, Harbin 150040, China;2. Key Lab of Forest Ecology and Environment, State Forestry Administration, Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China;3. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;1. Research Center of Forest Management Engineering of State Forestry and Grassland Administration, Beijing Forestry University, 100083 Beijing, China;2. College of Urban and Environmental Science and MOE Laboratory for Earth Surface Processes, Peking University, 100871 Beijing, China;3. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, 100085 Beijing, China;4. Department of Forest and Wood Science, Stellenbosch University, 7602 Matieland, South Africa;1. The State Key Laboratory of Loess and Quaternary Geology, the Institute of Earth Environment, Chinese Academy of Sciences, Xi''an, 710061, China;2. CAS Center for Excellence in Quaternary Science and Global Change, Xi''an, 710061, China;3. Open Studio for Oceanic-Continental Climate and Environment Changes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266061, China;4. Interdisciplinary Research Center of Earth Science Frontier (IRCESF) and Joint Center for Global Change Studies (JCGCS), Beijing Normal University, Beijing 100875, China;5. School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China;6. The University of the Chinese Academy of Science, Beijing 100049, China |
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| Abstract: | Accurately assessing the impact of climate changes on tree growth or forest productivity is vital to better understand global carbon cycles. Here, we carried out dendroclimatological research on Yezo spruce (Picea jezoensis var. microsperma) along an elevation gradient in two sites to investigate the effect of rapid warming on spruce growth in northeast China. Results indicated that trees at two low-elevation sites had significantly wider ring widths and higher basal area increment (BAI) compared with high-elevation sites. Ring widths and BAI of Yezo spruce at low elevations showed a clear growth increase during the 1940s–1970s followed by a significant decline after 1980. However, trees at high elevations showed a relatively stable growth during the 1940s–1970s followed by a significant increase after 1980. Rapid warming after 1980 increased the radial growth of Yezo spruce at high-elevation sites, but reduced tree growth at low-elevation sites. Winter precipitation and growing season temperature were positively correlated with radial growth of Yezo spruce at high elevations, but negatively correlated with tree growth at low elevations. A clear pattern of growth and growth-climate relationship changed in 1980. The temperature threshold for determining the impact of climate on Yezo spruce could change with latitude or site. Difference in drought caused by warming may be the main reason for the opposite response of tree growing at different altitudes in northeast China. The mechanism of rapid warming driving contrasting growth at different elevations should also be investigated in other tree species in NE Asia. In the context of future climate warming, our findings are of great significance for tree growth in assessing forest dynamics and carbon cycling. |
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| Keywords: | Growth decline Basal area increment Elevation gradient Drought Dendrochronology Climate change |
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