Testing the accuracy of resistance drilling to assess tree growth rate and the relationship to past climatic conditions |
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| Affiliation: | 1. School of Ecosystems and Forest Sciences, Faculty of Science, The University of Melbourne, 3010, Parkville, VIC, Australia;2. The Fenner School of Environment and Society, Australian National University, Canberra, Capital Territory, Australia;1. Department of Geosciences and Natural Resource Management, University of Copenhagen, Rolighedsvej 23, DK-1958 Frederiksberg C, Denmark;2. UMR 1202 BioGeCo – INRA/Université Bordeaux, 69 route d''Arcachon, 33610 CESTAS Cedex, France;1. Department of Environmental Horticulture, CLCE, IFAS, University of Florida, 100A Mehrhof Hall, Gainesville, FL 32611, United States;2. Department of Environmental Horticulture, CLCE, IFAS, University of Florida⿿Gulf Coast Research and Education Center, 14625 County Road 672, Wimauma, FL 33598, United States;3. College of Natural Resources, University of Wisconsin Stevens Point, 800 Reserve Street, Stevens Point, WI 54481, United States;4. Department of Environmental Horticulture, CLCE, IFAS, University of Florida, P.O. Box 110675, Gainesville, FL 32611, United States;5. Functional and Ecosystem Ecology Unit, Universidad del Rosario, Kr 26 No 63B-48, Bogotá D.C., Colombia;1. Universidade Federal de São Paulo - UNIFESP, Diadema, Estado de São Paulo, Brazil;2. Secretaria do Verde e Meio Ambiente (SVMA) - Prefeitura do Município de São Paulo, São Paulo, Brazil;3. Instituto de Pesquisas Ambientais, Secretaria de Infraestrutura e Meio Ambiente, São Paulo, Brazil;4. Centro de Energia Nuclear na Agricultura, Universidade de São Paulo, Piracicaba, Brazil;1. Department of Horticulture (0327), Virginia Tech, Saunders Hall, 490 West Campus Dr., Blacksburg, VA 24061, United States;2. Department of Forest Resources and Environmental Conservation (0324), Virginia Tech, Cheatham Hall, 310 West Campus Dr., Blacksburg, VA 24061, United States;3. Department of Horticulture, Virginia Tech, Hampton Roads Agricultural Research and Extension Center, 1444 Diamond Springs Rd., Virginia Beach, VA 23455, United States;4. Department of Crop and Soil Environmental Sciences (0404), Virginia Tech, Smyth Hall, 185 Ag Quad Lane, Blacksburg, VA 24061, United States;5. Department of Biological Systems Engineering (0303), Virginia Tech, Seitz Hall, 155 Ag Quad Lane, Blacksburg, VA 24061, United States |
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| Abstract: | Assessing tree growth trends over time is a central but challenging aspect of urban forest management. The potential damage caused by invasive devices used in dendrochronological analysis is a common concern among urban foresters. Thus, the development of a less-invasive method for assessing tree growth rate faster that provides reliable results is clearly beneficial. In this study, resistance drilling (RD) profiles were compared with stem core assessments (Core) to estimate the growth rate of 78 trees of three species (Quercus robur, Ulmus procera, and Platanus x acerofolia). All studied trees were core-sampled in 2013 and then resistance drilled in 2015 at a stem height of 1–1.3 m in both north (N) and west axes (W). The dependency and accuracy of paired annual ring series (CORE measurements and Resi reading) were tested using ANOVA and regression analysis. In addition, point and event year tests were determined to confirm the accuracy of the RD to assess growth trends at both population and tree level. Growth series from both methods were cross-dated to test the reliability of RD to relate historical tree growth to past climatic conditions. ANOVA analysis confirmed that average ring width values and age of 70 out of 78 trees were statistically similar for both methods and similar for both sampled stem axes. Within each tree, regression analysis indicated significant correlation between cored ring datasets and paired resistance drilled ring datasets (R2 = 0.78–0.95, p < 0.05) across species. RD reliably detected pointer years at population level for Q. robur only. For all species, RD could not adequately detect event years at tree level. Regardless of species and drill axes, RD was less accurate in measuring ring width below 1 mm. For all species, RD yielded lower intercorrelation indices and greater number of “A” flagged segments as compared to CORE. Overall, RD can successfully estimate mean annual ring values to a comparable standard as conventional CORE analysis. However, the RD device used in this study did not detect the inter-annual growth pattern to the same standard as stem CORE analysis, RD should not be used to replace dendrochronology in climate-tree growth studies. |
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| Keywords: | Ring analysis Dendrochronology Urban forests Drilling profiles Growth trends |
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