Banca de QUALIFICAÇÃO: JEANNE RAQUEL DE ANDRADE FRANCO
Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.DISCENTE : JEANNE RAQUEL DE ANDRADE FRANCO
DATA : 17/11/2016
HORA: 13:00
LOCAL: Unidade Acadêmica Especializada em Ciências Agrárias
TÍTULO:
Intraspecific interaction and abiotic characterization in two degraded mangrove areasPALAVRAS-CHAVES:
Competition; facilitation index; Restoration; Rhizophora mangle.PÁGINAS: 23
GRANDE ÁREA: Ciências Agrárias
ÁREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Conservação da Natureza
ESPECIALIDADE: Recuperação de Areas Degradadas
RESUMO:
Mangroves are ecosystems coastal and estuarine belonging to warm temperate and wet tropics, mangroves are dominated by woody species, home to a high diversity, with social and environmental importance. Abiotic and biotic variables, including interactions between plants, are interrelated and directly affect on ecosystem driving distribution pattern of seedlings and growth, besides allow analysis of the intensity of degradation. The objective of study was to investigate the intraespecific interaction process of Rhizophora mangle influencing the growth of seedlings in two areas, one with presence of trees and closed canopy, and other open area. The other objective was to analyze the environmental characteristics with the collection of abiotic variables. Two experiments were conducted. In the first, nine plots were selected in each area and a seedling in each plot to measure growth over time. In the second experiment were selected six plots in each area and six plants totaling seventy two plants. The growth of selected plants was verified through measurements of the height, number of branches and diameter and 30 cm height. For the abiotic variables were taken temperature measurements and soil pH, light and salinity. Seedlings from open environment performed better with more branches, greater height and diameter. The facilitation index indicated competition in the arboreal environment for the three growth variables. Light and temperature were higher in open areas, pH was lower in this area and salinity was similar for the two environments. Competition for light can be the main factor interfering in the growth of seedlings under the canopy of trees and the lower seedling development this shadow environment allows less resistance to waves and wind energy. The open areas may facilitate growth by density seedlings which reduce the environmental stresses of temperature. Mangle is a species that adapts to the environment with higher brightness. Abiotic variables of each environment studied can influence the growth of seedlings of R. mangle through nitrogen fixation.
MEMBROS DA BANCA:
Interno - 1605704 - SIDNEY CARLOS PRAXEDES
Externo ao Programa - 006.988.680-64 - GUILHERME GERHARDT MAZZOCHINI - UFRN
Externo à Instituição - ALEXANDER CESAR FERREIRA ROMAN - UFC