Dendrochronology and growth of Copaifera langsdorffii wood in the vegetation dynamics of the Pirapitinga Ecological Station, state of Minas Gerais, Brazil

Abstract

This study aims to build a chronology of the growth rings of Copaifera langsdorffii (copaíba) in order to understand the dynamics of vegetation types that occur on a river island in the Cerrado biome. For this purpose, we selected 30 trees of copaíba established in a vegetation of Mata Seca Sempre-Verde in the Pirapitinga Ecological Station (EEP), state of Minas Gerais, Brazil. Two radial samples from each tree were collected by an auger. The samples were treated by mechanical polishing for better visualization of the growth rings, and consequently further delineation and measurement. Later, the width of the growth rings was verified in order to generate a master time series of the specie. To check the influence of meteorological factors, we used the Pearson correlation (p < 0.05). The results showed that the population of copaíba in the EEP presented dendrochronologyc potential, which was confirmed by the high values of wide growth rings correlation within and between trees. The dendrochronologyc analysis revealed that copaíba trees were already present before the dam filling, but with lower population density than today. It was also possible to infer that the development of the vegetation type Mata Seca Sempre-Verde occurred since the decade of the 1970. The average sensitivity was enough to consider the species sensitive to environmental variations. Precipitation and temperature only influenced positively the growth rings in the transition from dry to wet seasons. The results revealed information about the dynamics of the local vegetation, elucidating the changes that occurred in the environment in which the population of copaíba is established.

Oleoresin prospection in Copaifera sp. trees by using impulse tomography

“…According to Rodrigues et al (2011), oleoresin is produced by secretory glands and accumulates itself in the lumen of secretory channels, distributed along the xylem. These findings were corroborated by Carvalho et al (2018), Medeiros (2016), Plowden (2003Plowden ( , 2004, and Marcati et al (2001).…”

DENDROCHRONOLOGICAL STUDY OF Brosimum utile (Kunth) Oken FROM TIMBIQUÍ, CAUCA, COLOMBIA

“…The assessment of climate factors would explain the cambium's response, with rainfall being a variable that incites its activity in the American tropic (Callado, et al, 2013;Carvalho et al, 2018;Schweingruber, 1988). Various tropical trees show yearly rings as a result of seasonal climate, and this could be used to determine the age of trees and their growth rate (Groenendijk, et al,2017).…”

Relações morfométricas para <em>Copaifera langsdorffii</em> (Desf.) Kuntze na região norte de Minas Gerais, Brasil

“…With great ecological plasticity, the species can occurs naturally in entire Brazilian territory, as in region of Minas Gerais state, Cerrado, Caatinga, Atlantic Forest, Riparian Forest formations and associated ecosystems (CARVALHO et al, 2009;MELO JUNIOR, CECCANTINI and BONA, 2011;COSTA et al, 2012b;NUNES et al, 2015;CARVALHO et al, 2018). According Orellana and Koehler (2008), although wood is the main economic resource derived from forests, some species have great importance for alternative products supply, as in the case of oil-resin, with wide range of medical applications (PIERI, MUSSI and MOREIRA, 2009;MUSSI et al, 2009;HECK, VIANA and VICENTINI,2012).…”