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| Format: | Artículo científico |
| Language: | en |
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Academia Brasileira de Ciências
2016
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| Online Access: | https://www.redalyc.org/articulo.oa?id=32746362008 |
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Table of Contents:
- Occurrence of annual growth rings in Rhizophora mangle in a region with low climate seasonality BRUNNA T. SOUZA GUSTAVO C.D. ESTRADA MÁRIO L.G. SOARES CÁTIA H. CALLADO Multidisciplinaria (Ciencias Naturales y Exactas) proxy mangrove Growth rings dendroecology dendrochronology The formation of annual growth rings has been confi rmed for several mangrove species in the last decade, among which is the Rhizophoramangle. However, the record of annual rings for this species was made in a region with high hydric seasonality, a widely recognized induction factor of annual rings in tropical species. In this sense, the present study aimed to verify the occurrence of annual growth rings in R. manglein the mangroves of Guaratiba (Rio de Janeiro, Southeastern Brazil), a region with low hydric seasonality. For this purpose, the crossdating technique was applied in ten trees collected with known age (seven years). The growth rings are characterized by alternating layers of low vessel density (earlywood) and high vessel density (latewood). Multiple regression analysis indicated that growth rings width variation is driven by precipitation, water surplus, water defi cit and water storage. Crossdating analysis confi rmed the existence of annual growth rings in the R. mangle in Guaratiba. This discovery in a region with low hydric seasonality increases the dendrocronological potential of this species and suggests the importance of biological factors (eg. phenological behavior) as complementary inductors for the formation of growth rings in this species. 2016 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32746362008 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.1 Vol.88