Establishment of riparian forest in disturbed and degraded areas / Estabelecimento de mata ciliar em Ãreas degradada e pertubada

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

The restoration of riparian forests along the rivers, around the lakes, reservoirs and springs, generates many benefits to the ecosystem, providing with the time, protection to the springs, soil and fauna. The main objective of this study was to evaluate the establishment of mixed planting in the cities of Itutinga and Carrancas, Alto do Rio Grande region, state of Minas Gerais. The behavior of arboreal and shrub species planted on the riverbanks in different topographic gradients in degraded area and in the reservoir share in disturbed area has been evaluated. For both areas, a survey of the natural regeneration was done to verify the processes of natural regeneration. Thus, the following steps were carried out: a) the demarcation of three transects of 15 m width and variable length, following the slope, subdivided in plots of 12 x 15 m for arboreal species evaluation (DBH>5 cm) in function of the topographic gradient and sub parcels of 2 x 15 m for survey of the natural regeneration (DBH<5 cm and height>10 cm) in degraded area; b) evaluation of the vigor and growing of all the arboreal individuals and the allocation of four transects with three parcels of 1X15 m each, following the slope, for the survey of the natural regeneration in disturbed area. From these results, it could be concluded that in degraded areas, the arboreal individuals of the Fabaceae family presented a better growth and the climax species increased the growth rhythm during the period of 58 to 155 months. In relation to the natural regeneration, the adjacent fragment provides a great amount of propagules. In disturbed area, in general, the pioneer species presented the greatest values of height and diameter at 150 months; however, in the period of 65 to 150 months, most of them reduced the growth rhythm, while the light-demanding climax species exhibited a higher relative growth. In the natural regeneration, there was predominance of individuals of the Asteraceae family that is characteristic of disturbed areas.

ASSUNTO(S)

silvicultura

ACESSO AO ARTIGO

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