Differences in climate-growth relationships between two tree species that co-occur in a seasonally dry tropical forest in Northeastern Brazil |
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| Affiliation: | 1. Plant Anatomy and Dendrochronology Laboratory, Department of Biology, Federal University of Sergipe, Av. Marechal Rondon s/n, Rosa Elze, São Cristóvão, Sergipe 49100-000, Brazil;2. Department of Plant Biology, Institute of Biology, University of Campinas – UNICAMP, P.O. Box 6109, 13083-970 Campinas, SP, Brazil;1. Department of Biology & Environment, Faculty of Natural Sciences, University of Haifa – Oranim, Tivon 36006, Israel;2. Department of Wood Science, Technical University in Zvolen, 96001 Zvolen, Slovakia;3. Department of Phytology, Technical University in Zvolen, 96001 Zvolen, Slovakia;1. Department of Ecology and Environment System, Kyungpook National University, Sangju 37224, Republic of Korea;2. Forest ICT Research Center, National Institute of Forest Science, Seoul 02455, Republic of Korea;1. Department of Geography, Johannes Gutenberg University, 55099 Mainz, Germany;2. Curt-Engelhorn-Centre of Archaeometry, D6, 3, 68159 Mannheim, Germany;3. Global Change Research Institute, Czech Academy of Sciences, 60300 Brno, Czech Republic;4. Department of Agrosystems and Bioclimatology, Mendel University, 61300 Brno, Czech Republic;5. Department of Geography, University of Cambridge, Cambridge CB2 3EN, UK;6. Department of Geography, Faculty of Science, Masaryk University, 61137 Brno, Czech Republic;7. Swiss Federal Research Institute (WSL), 8903 Birmensdorf, Switzerland;1. Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Department of Forest Resource, Av. Pádua Dias No 11, Piracicaba, São Paulo 13418-900, Brazil;2. Department of Plant Biology, Institute of Biology, University of Campinas – UNICAMP, Campinas, São Paulo 13083-970, Brazil;3. Argentine Institute of Nivology, Glaciology and Environmental Sciences (IANIGLA), CONICET-Universidad Nacional de Cuyo, Mendoza 5500, Argentina;4. Hémera Centro de Observación de la Tierra, Escuela de Ingeniería Forestal, Facultad de Ciencias, Universidad Mayor, Santiago 8580745, Chile;1. Visser Statistical Research, Arnhem, the Netherlands;2. Chair of Forest Growth and Woody Biomass Production, TU Dresden, Tharandt, Germany |
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| Abstract: | Seasonally dry tropical forests are an important global climate regulator and represent one of main drivers of carbon sink dynamics. However, projections of climate change suggest future productivity losses and negative impacts on forest functioning. Understanding the interaction between climate variability and tree growth responses between species with different growth strategies represents a crucial challenge to forecast ecosystem functioning in the future. Here we used tree ring chronology to evaluate changes in growth and climate sensitivity of two tropical tree species that co-occur in a seasonally dry tropical forest in Brazil: Cedrela odorata and Ceiba glaziovii. Using Pearson correlations and linear regressions we explored how growth variability is correlated with local (precipitation, temperature) and global (ocean temperature and El Niño Southern Oscillation - ENSO) climatic factors. Tree growth was closely related with precipitation in C. odorata (r = 0.59) and C. glaziovii (0.24). Differences were found at monthly level, which C. odorata showing greater sensitivity in the beginning of rainy season. The South Atlantic Temperature was positively correlated with C. odorata, while ENSO was negatively correlated. Our results showed a dominant effect of precipitation on tree growth and suggest that are different growth strategies among species, which C. odorata being the most sensitive to drought and C. glaziovii more adapted with parenchyma in trunk. Therefore, C. odorata is probably more vulnerable to the deleterious effects of future climate change than C. glaziovii. Our findings highlight the importance of understanding the climate sensitivity of different seasonally dry tropical forest species, which is critical to predicting carbon dynamics in tropical regions. These also reveal that differences in sensitivity must be considered when prioritizing conservation measures for seasonally dry tropical forests. |
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| Keywords: | Tree rings Seasonal forests Drought effects Climate change Growth strategies |
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