Banca de DEFESA: JANECLEIA SOARES DE ARAGÃO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : JANECLEIA SOARES DE ARAGÃO
DATA : 28/07/2022
HORA: 14:00
LOCAL: via Google meet
TÍTULO:

Diversity, structure and floristic composition of restored sites by direct seeding on the Amazon south edge

PALAVRAS-CHAVES:

floristic composition, regenerants, recovery of vegetation structure attributes, forest succession.

PÁGINAS: 44
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
SUBÁREA: Ecologia de Ecossistemas
RESUMO:

The forests of the south of the Amazon were highly deforested, including the riparian forests legally protected, requiring reforestation actions. Direct seeding has been expanding as an active method of low cost and easy to implement on a large scale. Through the Xingu basin restoration program, more than 5,000ha have already been restored by direct seeding. In this study we evaluated and compared the structure, diversity and floristic composition of arboreal vegetation from forests restored by direct seeding and primary forests on the southern edge of Amazonia. We measured height, diameter and identified all woody individuals with diameter at breast height (DBH) ≥ 5 cm in 23 plots 10 x 50 m established in restored forest areas and 10 in primary forests. In addition, we classified the species occurring in the restored plots as seeded and naturally regenerated. We recorded 1,661 individuals belonging to 71 species distributed in 60 genera of 29 families. The restored forests showed no similarity and exhibited lower species richness, biomass and basal area when compared to adjacent primary forests, showing that the recovery time of ~10 years was not enough to recompose the parameters. Direct sowing, most of the time, resulted in high dominance of a single species and low diversity, even so the richness and diversity between sown and regenerated species did not show a statistically significant difference, showing that regeneration has been gradually established in these new ecosystems. In summary, our findings suggest that direct seeding is a good alternative for forest restoration in areas with little or no potential for passive regeneration in the Cerrado-Amazon transition.

MEMBROS DA BANCA:
Presidente - 888.812.616-34 - FREDERICO AUGUSTO GUIMARÃES GUILHERME - UFU
Interno - 986.188.651-68 - SIMONE MATIAS DE ALMEIDA REIS - UNEMAT
Externo à Instituição - PRISCILA SANJUAN DE MEDEIROS SARMENTO - UEPA