Radiocarbon analysis confirms annual periodicity in Cedrela odorata tree rings from the equatorial Amazon

On the use of tree‐ring area as a predictor of biomass accumulation and its climatic determinants of coffee tree growth

“…As in our work, annual growth rings have also been reported in other species in the tropics, especially forestry such as Cedrela odorata and Cedrela fissilis in Bolivia, Venezuela (Baker et al, 2017) and Brazil (Costa et al, 2013; de Pereira et al, 2018; Hammerschlag et al, 2019; Santos et al, 2020), Eschweilera coriacea in the nonflooded forests of Manaus, Brazil (Ohashi et al, 2016) and Tabebuia aurea in the dry Caatinga forest in Brazil (Aragão et al, 2019). To detect the climatic signal retained in these annual rings, the time series obtained can be selectively improved before being correlated with the climatic variables, through some statistical methods (Peters et al, 2015).…”

“…Also, the sunlight hours and the relative humidity played an important role in the same months that temperature. Several tree species in the tropics have also been shown to have growth mainly positively correlated to annual and/or monthly rainfall values, with the most significant correlations found for the months around the rainy season (Aragão et al, 2019; de Pereira et al, 2018; Ohashi et al, 2016; Santos et al, 2020).…”

Growth Assessment of Native Tree Species from the Southwestern Brazilian Amazonia by Post-AD 1950 14C Analysis: Implications for Tropical Dendroclimatology Studies and Atmospheric 14C Reconstructions

“…The data cover a length of approximately 4 months in total, which started at the preceding calendar year and spilled over to the next year, placing the maximum growth where precipitation was already well established. This type of anchoring and adjustment by calendar dates has been proven to work well for tree species and settings across the Pantropical region (e.g., [11,24]). tree species would be required to better elucidate the atmospheric circulation pattern and the carbon reservoir provenances affecting this region [44,85].…”

“…Hence, it is paramount that tree growth increments be continuous and their pattern well known so that climate indicators can be properly derived [7][8][9]. Moreover, tree ring research is relevant to atmospheric radiocarbon ( 14 C) reconstructions [10,11]. Calibration curves are needed for converting 14 C dates to cal-Forests 2021, 12, 1177 2 of 18 endar ages [12,13], and for studying the global carbon cycle [14,15] and the effects of anthropogenic activities on the environment and the climate system [16].…”

“…Worldwide atmospheric 14 C observations at sites in both the Northern and Southern Hemispheres have been used to establish atmospheric 14 C calibration curves across the globe [27]. In the Neotropical realm, direct comparisons of 14 C content in cellulose fibers extracted from a tree-ring wood sample of known age have helped confirm tree species growth patterns as annual [10,11,[28][29][30][31], problematic [21], or occurring twice a year [24]. This method has also helped scientists to identify consistent wood layers corresponding to seasonal or annual growing periods in tree species at several other major ecological regions, such as Mediterranean climatic areas [20,31], subtropical rainforest [22], and tropical savanna [32], for example.…”