Natural Regeneration Stratum as an Indicator of Restoration in Area of Environmental Compensation for Mining Limestone, Municipality of Barroso, Mg, Brazil

Abstract

-This study was conducted in a forest under restoration process, which belongs to the company Holcim Brasil S/A, in the municipality of Barroso, state of Minas Gerais (21 o 00'to 22 o 00'S and 43 o 00' to 44 o 00'W), where 40 plots (2 x 2 m) were set, spaced at 10 m, forming eight strata parallel to the watercourse present in the area. Floristic composition and natural regeneration stratum were characterized, and the formed strata allowed evaluating whether the riparian vegetation and watercourse influence on the local regeneration. It was found 162 individuals of 13 families, 18 genera and 22 species, and 10,125 individuals/ha were estimated. Successional classes from pioneer and early secondary and zoochory dispersion syndrome prevailed among species and individuals. The watercourse and riparian vegetation did not exercise significant influence (p> 0.05) on the number of species and regenerating individuals among the different strata of the forest. The diversity index of Shannon-Wiener (H') and equability of Pielou (J') were 2.691 and 0.870, respectively. The species Psidium guajava and Myrtaceae families presented the highest VI (value of importance). Natural regeneration analysis showed the low floristic diversity in the area, suggesting that corrective management actions should be adopted.

Sexual and asexual propagation of Baccharis dracunculifolia DC., a dioecious medicinal Brazilian shrub

“…However, the high dry mass index (maintenance period) is influenced by the environment, but unfavorable relative humidity and temperature conditions may contribute to accelerate the respiratory process when the seeds start the deterioration process by oxidizing the reserve substances (Bewley et al, 2013). The anemochory dispersal of diaspores of B. dracunculifolia (Campos & Martins, 2016) may have been decisive for its rapid dispersion after reaching physiological maturity. No more diaspores were identified for the harvest after five days, which prevented the identification of decreases in the dry mass accumulation of diaspores.…”

“…Besides that, the plant has an essential oil rich in pharmacological and biological activities (Chan, Tan, Chan, Lee, & Goh, 2016). Among the plants of the genus Baccharis found in Brazil, B. dracunculifolia is the species with the most characteristics of anthropic pioneer (Barroso & Bueno, 2002) and has a high rate of natural regeneration, which emphasizes its ecological importance in the recovery of degraded areas (Campos & Martins, 2016).…”

Spectral Behavior of Pinus elliottii, Subjected to Drought in Southern Brazil

“…When initiating a reforestation process, there is a need to evaluate and monitor it to see if the proposed goals and objectives are being met (Campos & Martins, 2016). Thus, it is imperative that the evaluations be carried out in regular time spaces, in order to avoid the occurrence of unforeseen events that may jeopardize the process (Miranda Neto et al, 2012), eliminating errors and surplus costs immediately and favoring the evolution of it.…”