Estudo dos anéis de crescimento de Schizolobium parahyba (Leguminosae: Caesalpinioideae) após episódio de mortalidade em Ilha Grande, Rio de Janeiro

Abstract

-(Tree-ring study of Schizolobium parahyba (Leguminosae: Caesalpinioideae) after a mortality episode in Ilha Grande, Rio de Janeiro state). Schizolobium parahyba (Vell.) S.F. Blake is a native species of the Atlantic rain forest which trees disappeared from Ilha Grande, Rio de Janeiro, due to a mortality episode. In this study, the growth-rings were investigated with the objective of determining the age of the dead trees, the relationship between growth-ring width and local precipitation, and the possible relationship between mortality episode and the population age structure or successional processes. The results showed that dead individuals had different ages and that growth-rings width was significantly correlated with the annual precipitation in the period investigated. The possibility of the death episode being part of a natural succession process or a particular event of a senescent population was discarded and it is suggested that climatic anomalies that occurred between the years 1997 and 2001 have probably contributed to tree mortality.

DENDROCRONOLOGIA DE ÁRVORES DE Schizolobium parahyba(Vell.) S. F. Blake DE OCORRÊNCIA NA REBIO DE TINGUÁ-RJ

“…Essas características, entre outras, estão entre os principais tipos de marcação de anéis de crescimento de espécies potenciais para estudos dendrocronológicos, concordando com o padrão referido na literatura para a espécie (FERREIRA, 2002;TOMAZELLO FILHO et al, 2004;LISI et al, 2008;MARCATI et al, 2008;GUIMARÃES, 2010).…”

“…No entanto, já em 1927 foi descrita a presença de anéis de crescimento anuais em árvores tropicais (COSTER, 1927). Essa evidência vem sendo confirmada nos últimos anos, através de uma série de estudos com espécies de clima tropical (WORBES, 2002;SCHÖNGART et al, 2002;DEZZEO et al, 2003;BRIENEN;ZUIDEMA, 2005;CALLADO et al, 2001b;GUIMARÃES, 2010).…”

Understanding Canoe Making as a Process of Preserving Cultural Heritage

“…People noted the disturbance but did not know the reason for the mortality. In their research, Callado and Guimarães (2010) estimated that climatic anomalies were most likely the responsible factors for the mortality of S. parahyba on an island near the Reserve.…”

Differences in allometry and population structure between native and invasive populations of a tropical tree

“…Alternatively, the low density of seedlings might be also linked to the more stressful conditions for seedlings in the invaded than in native range during the winter, when there is an increase in light yet low water availability (Gandolfi et al 2007). A tree-ring study of S. parahyba in the Atlantic coastal forest, where the species is native, showed that annual growth is correlated with precipitation (Callado & Guimarães 2010). Some physiological adaptations and growth characteristics of this species, such as low wood density, tall height and fast growth are closely related to a high water requirement (Kagawa et al 2009).…”