Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/33134
Title: Dendrochronological analyses and climatic signals of in subtropical forest of southern Brazil
Keywords: Dense rainforest
Euphorbiaceae
Growth rings
Growth‐climate relationships
Sea surface temperature
Issue Date: Jun-2018
Publisher: Wiley
Citation: SOUZA, D. G. et al. Dendrochronological analyses and climatic signals of in subtropical forest of southern Brazil. Austral Ecology, [S.l.], v. 43, n. 4, p. 385-396, June 2018.
Abstract: The predominance of secondary forest‐species in Brazilian subtropical forests highlights the importance of understanding the ecology of these taxa, and dendrochronology provides valuable information about the growth and climate response of tree species. The wide distribution of Alchornea triplinervia (Spreng.) Mull. Arg. (Euphorbiaceae), and the presence of growth rings in its wood, leds to its selection for this study. Samples were collected from 34 trees growing in rainy dense forest fragments in the cities of Blumenau and Brusque, in southern Brazil, and subjected to standard dendrochronological techniques. The local chronology spanned from 1889 to 2013 and the age of the trees ranged from 32 to 125 years. The mean age was 73 years and annual increment was 1.13 mm year−1; the diameter and age showed a weak correlation. The results suggest that A. triplinervia growth responded negatively to hot summers and increased rainfall in the previous spring and winter. The high perdiodicity trend characteristic of ENSO activity was reflected in wavelet power spectra of A. triplinervia chronology, affecting positively its growth after strong ENSO events (1970–2009). Negative influences occurred before 1970 during normal ENSO events. Also, there is evidence of the existence of a connection between Pacific and Atlantic sea surface temperatures influencing on tree growth.
URI: https://onlinelibrary.wiley.com/doi/full/10.1111/aec.12576
http://repositorio.ufla.br/jspui/handle/1/33134
Appears in Collections:DCF - Artigos publicados em periódicos

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