Cellulose oxygen isotopic composition of teak (Tectona grandis) collected from Java Island: a tool for dendrochronological and dendroclimatological analysis |
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| Institution: | 1. Division of Earth and Planetary Sciences, Graduate School of Science, Kyoto University, Kyoto Japan;2. Faculty of Human Sciences, Graduate School of Human Sciences, Waseda University, Tokorozawa, Japan;3. Research Institute for Humanity and Nature, Kyoto, Japan;4. Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Japan;5. Department of Biosphere Resources Science, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan;6. Research Institute for Sustainable Humanosphere, Kyoto University, Kyoto, Japan;7. Center for Innovation, Indonesian Institute of Sciences, Jakarta, Indonesia;8. Faculty of Forestry, Universitas Gadjah Mada Bulaksumur, Yogyakarta, Indonesia;1. V.N. Sukachev Institute of Forest SB RAS, Akademgorodok 50, bld. 28, 660036 Krasnoyarsk, Russia;2. WSL Swiss Federal Research Institute, Zürcherstrasse 111, CH-8903 Birmensdorf, Switzerland;3. Paul Scherrer Institute, Villigen 5232, Switzerland;4. Siberian Federal University, Svobodny av. 79, 660041 Krasnoyarsk, Russia;5. ETH Zurich, Institute of Terrestrial Ecosystems, Zurich 8092, Switzerland;1. Institute of Plant and Animal Ecology, Ural Branch of the Russian Academy of Sciences, 620144, Ekaterinburg, Russia;2. Department of History of the Institute of Humanities, Ural Federal University, 620000, Ekaterinburg, Russia;3. Institute of Ecology, Abkhazian Academy of Sciences, 384900, Sukhum, Abkhazia;1. Australian Rivers Institute, Griffith University, 170 Kessels Rd., Nathan, QLD, 4111, Australia;2. School of Health, Medical and Applied Sciences, Central Queensland University, 538 Flinders St. West, Townsville, QLD, 4810, Australia;3. Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, NSW, 2232, Australia;1. School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, South Korea;2. Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA;1. Centre for Environmental Change and Quaternary Research, University of Gloucestershire, Cheltenham, UK;2. Tree-Ring Services, Mitcheldean, UK;3. Institute for the Environment, Brunel University, Uxbridge, London, UK;4. K Russell Consulting Ltd, Leighton Bromswold, Huntingdon, UK;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 |
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| Abstract: | The oxygen isotopic composition (δ18O) of tree-ring cellulose has been recognized as a powerful tool for dendroclimatological and dendrochronological investigations in Asia. Only a few studies of cellulose δ18O so far published, however, have been conducted in Indonesia, and the spatial coherence of cellulose δ18O has yet to be clarified. In this study we measured cellulose δ18O of teak (Tectona grandis) collected from four sites on Java Island to evaluate the similarity between the different teak δ18O values and the potential for using teak δ18O both as a climate proxy and as a tool for cross-dating. Cellulose δ18O time series of Javanese teaks were found to be significantly correlated in all of the comparisons between sites, even between sites separated by a distance as great as 400 km. While significant correlations did not appear in the ring width data between our samples (expressed population signal (EPS) = 0.64; Rbar = 0.23; sample depth = 10), they were found between the cellulose δ18O values (EPS = 0.89; Rbar = 0.58; sample depth = 10). These results suggest that teak δ18O variations have higher spatial coherence and might be a useful tool for cross-dating. A significant negative correlation was observed between cellulose δ18O and the relative humidity/precipitation during the rainy season, indicating that the cellulose δ18O of Javanese teak is an effective proxy for relative humidity/precipitation during the rainy season. Cellulose δ18O was found to be positively correlated with precipitation during the dry season preceding the growing season, whereas it showed no correlations with the temperature and Palmer Drought Severity Index (PDSI), the key constraints of δ18O on the Indochina Peninsula. |
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| Keywords: | Tree-Ring Cellulose oxygen isotope Indonesia Teak |
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