Species-specific growth-climate responses of Dahurian larch (Larix gmelinii) and Mongolian pine (Pinus sylvestris var. mongolica) in the Greater Khingan Range,northeast China |
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| Affiliation: | 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. Instituto Pirenaico de Ecología (IPE-CSIC), Avda. Montañana 1005, 50192, Zaragoza, Spain;2. School of Agricultural, Forest, Food and Environmental Sciences, Univ. Basilicata, Potenza, I-85100, Italy;3. Department of Geography, University of Cambridge, Cambridge, CB2 3EN, UK;4. Swiss Federal Research Institute (WSL), 8903, Birmensdorf, Switzerland;5. Global Change Research Institute of the Czech Academy of Sciences (CzechGlobe), 603 00, Brno, Czech Republic;6. Department of Geography, Faculty of Science, Masaryk University, 613 00, Brno, Czech Republic;1. Missouri Tree-Ring Laboratory, School of Natural Resources, University of Missouri, 1111 Rollins Street, Columbia, MO, 65211, USA;2. The Jones Center at Ichauway, 3988 Jones Center Drive, Newton, GA, 39870, USA;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, 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. State Key Laboratory of Tree Genetics and Breeding, School of Forestry, Northeast Forestry University, Harbin 150040, PR China;2. Center for Ecological Research, Northeast Forestry University, Harbin 150040, PR China;3. Southern Swedish Forest Research Centre, Swedish University of Agricultural Sciences, Box 49, SE-230 52 Alnarp, Sweden;1. College of Forestry, Inner Mongolia Agricultural University, Hohhot 010019, China;2. Department of Earth, Environmental and Geographic Sciences, University of British Columbia (Okanagan), 1177 Research Road, Kelowna, British Columbia V1V 1V7, Canada;3. Global Change Institute, University of Queensland, Brisbane, Queensland 4072, Australia;4. Department of Forestry, Mississippi State University, Mississippi State, MS 39762, United States;5. Forest Res Inst Baden Wurttemberg, Wonnhaldestr 4, D-79100 Freiburg, Germany;6. Departamento de Ciencias, Universidad Pública de Navarra, Campus de Arrosadía, Pamplona, Navarra 31013, Spain |
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| Abstract: | Responses of tree growth to climate are usually spatially heterogeneous. Besides regionally varying external environments, species specificity is a crucial factor in determining said spatial heterogeneity. A better understanding of this species specificity would improve our estimations of the warming effects on forests. In this study, we selected two widely-distributed boreal conifers, Dahurian larch (Larix gmelinii) and Mongolian pine (Pinus sylvestris var. mongolica), to compare their growth-climate responses, including long-term growth-climate correlations and short-term growth resilience to drought. We sampled 160 trees and 481 tree-ring cores from the two species in two pure and two mixed forests, located in the Greater Khingan Range, northeast China. We found that Dahurian larch was generally positively correlated with spring temperature and negatively correlated with summer temperature. In contrast, Mongolian pine was more sensitive to summer moisture. Our results suggest that the main climatic limitations were low spring temperatures for Dahurian larch and summer moisture deficits for Mongolian pine. Dahurian larch represented higher growth resistance to drought, while Mongolia pine represented higher recovery. Based on this, we inferred that Dahurian larch was more vulnerable to extreme droughts, while Mongolian pine was more vulnerable to frequent droughts. We also demonstrated the effects of forest type on growth-climate responses. The negative effects of summer temperatures on Mongolian pine seemed to be more significant in mixed forests. As warming continued, Mongolian pine in this area would suffer severer moisture deficits, especially when coexisting with Dahurian larch. Our results suggest that Dahurian larch gained an advantage in the competition with Mongolian pine during high moisture stress. Driven by the warming trends, the species specificity in growth response would ultimately promote the separation of the two species in distribution. This study will help improve our estimations of the warming effects on forests and develop more species-targeted forest management practices. |
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| Keywords: | Boreal forest Growth-climate correlation Growth resilience to drought Interspecies differences Pure and mixed forests Tree ring |
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