Abstract
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 (21º00'to 22º00'S and 43º00' to 44º00'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.
Highlights
Despite the economic importance, limestone mining can promote considerable negative environmental impacts such as the suppression of native vegetation for the opening of new mining areas (MARTINS NETO; RAMALHO, 2010)
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 (21o00'to 22o00'S and 43o00' to 44o00'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
Out of the 30 species used in the planting, 24 (80%) were not found in the stratum of natural regeneration, and only Lithrea molleoides, Schinus terebinthifolia, Croton urucurana, Inga vera, Trichilia catigua and Psidium guajava, common species for planting and the regeneration stratum, were found
Summary
Limestone mining can promote considerable negative environmental impacts such as the suppression of native vegetation for the opening of new mining areas (MARTINS NETO; RAMALHO, 2010). Once the process of restoring these environments starts, it is necessary to evaluate and monitor them to check if the proposed goals were met. For this purpose, the evaluation markers and monitoring tools were used. The evaluation markers and monitoring tools were used Those are tools used to detect whether the process of succession needs or does not need intervention (MARTINS, 2009), and to conclude whether the environment has already a position for self-supporting, as well. The evaluation of the natural regeneration under the canopy of areas at restoration process is an important tool for analyzing the evolution of restauration communities (MELO; DURIGAN, 2007) according to Marangon et al (2008), regeneration results from the interaction of restoring natural processes of the ecosystem, being part of the development cycle and the forest setting up
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