From modeling the kinetics of cell enlargement to building tracheidograms of Larix gmelinii Rupr. (Rupr.) in the permafrost zone in Siberia |
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| Institution: | 1. Siberian Federal University, 660041 Krasnoyarsk, Russia;2. Swiss Federal Institute for Forest, Snow and Landscape Research WSL, CH-8903 Birmensdorf, Switzerland;3. V.N. Sukachev Institute of Forest SB RAS, Federal Research Centre, 660036 Krasnoyarsk, Russia;4. West-Siberian Department of the V.N. Sukachev Institute of Forest SB RAS, 630082 Novosibirsk, Russia;5. College of Life Sciences, Zhejiang University, Hangzhou 310058, China;6. School of Geography and Ocean Science, Nanjing University, Nanjing 210023, China;1. Tree-Ring Services, Oakraven Field Centre, Mitcheldean, Gloucestershire GL17 0EE, UK;2. Ancient Yew Group, UK;1. Institute of Earth Sciences, Faculty of Natural Sciences, University of Silesia in Katowice, Będzińska 60, Sosnowiec 41-200, Poland;2. Institute of Geography and Regional Development, University of Wroclaw, Plac Uniwersytecki 1, Wrocław 50-137, Poland;1. WSL Swiss Federal Research Institute, Landscape Dynamics, CH-8903, Birmensdorf, Switzerland;2. Khakass Technical Institute, Siberian Federal University, 655017 Abakan, Russia;1. McMaster University, School of Earth, Environment and Society and McMaster Centre for Climate Change, 1280 Main Street West, Hamilton, ON L8S 4K1, Canada;2. Ontario Forest Research Institute, Ontario Ministry of Natural Resources and Forestry, 1235 Queen St. East, Sault Ste. Marie, ON P6A 2E5, Canada;3. Brock University, Department of Geography and Tourism Studies, 1812 Sir Isaac Brock Way, St. Catharines, ON L2S 3A1, Canada;1. Kazan Federal University, 18 Kremlyovskaya St., 420008 Kazan, Russia;2. Siberian Federal University, 79 Svobodny Pr., 660041 Krasnoyarsk, Russia;3. Ural Federal University, Ural Institute of Humanities, 51 Lenina St., 620002, Ekaterinburg, Russia;4. Institute of Plant and Animal Ecology UB RAS, 202/3 8-Marta St., 620144 Ekaterinburg, Russia;1. Department of Earth and Environmental Systems, Indiana State University, Terre Haute, IN 47809, USA;2. Department of Forestry, Michigan State University, East Lansing, MI 48824, USA |
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| Abstract: | Boreal forest ecosystems are a crucial element in the global climate balance. In harsh environments functioning lateral meristems of trees are more regulated by the exogenous (included local climate) than endogenous factors. This information is encoded in the tree-ring structure which can be effectively decomposed by the process-based tree-ring growth simulations. Moreover, the process-based modeling can be used to describe non-linear processes linking climate variables with tree-ring formation. In this study, we applied the Vaganov-Shashkin model to simulate seasonal cell production and cell enlargement of Larix gmelinii Rupr. (Rupr.) growing in the permafrost zone of Central Siberia. We developed a procedure for calculating the radial cell diameter based on specific Gompertz function combined with the “instantaneous tracheidogram” approach to estimate effectively seasonal cell production and timing of cell enlargement under climate control. Simulated cell number and cell size matched well with direct xylogenesis observations. The developed procedure demonstrate strong relationships between seasonal simulated growth rate and measured tracheid radial size (the average correlation is 0.64, < 0.01). A highly significant correlation ( < 0.01) between simulated and observed cell profiles was obtained for 71% of the growing seasons over the period 1950–2011. The strong exponential relationship (R2 = 0.67) was obtained between the day of the year (DOY) when cambial cell transfers into enlargement zone and simulated time intervals of cell enlargement. Based on the strong exponential relationship it was possible to reproduce the basic pattern of the observed tracheidograms over 1950–2011 with a systematic overestimation of final cell sizes at the beginning of the growing season, which will be possible to eliminate by using more anatomical data (trees) and longer period. The proposed approach of simulating intra-annual cell dynamics (cell production) has a great potential for studying how climate affects tree-ring formation. |
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| Keywords: | Cell size Process-based Vaganov-Shashkin model Cell production Cell timing Cell enlarging Wood anatomy |
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