Banca de DEFESA: BRUNA LAYZ CARVALHO DE MELLO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : BRUNA LAYZ CARVALHO DE MELLO
DATA : 30/04/2019
HORA: 08:30
LOCAL: Sala de videoconferência do centro de convivência
TÍTULO:

THE ROLE OF CLIMBING PLANTS AND HERBIVORY ON THE RESTORATION SUCCESS OF CAATINGA PLANT COMMUNITIES

PALAVRAS-CHAVES:

Caatinga restoration; recovery of degraded areas; adapted species; climbing plants; insect herbivores.

PÁGINAS: 44
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
RESUMO:

Semi-arid ecosystems are highly susceptible to landscape degradation. Among them, the Caatinga is one of the most vulnerable regions. Caatinga restoration has advanced with new successful methods like the use of facilitation and new techniques of planting. Nevertheless, there are after planting problems that interfere with restoration program success, such as climber plant interference and insect herbivory, which frequently have negative impact on transplant survival and growth. This work aims to investigate how insect herbivores and plant climbers affect growth and survival of different native tree species planted in a restoration project implemented at a degraded area of Caatinga. Sixteen native tree species from Caatinga were planted in 147 plots with 5 diversity levels: 1, 2, 4, 8, 16 species. Seedlings were monitored over a two years period. For all planted individuals we measured survival, growth, incidence of leaf herbivory and incidence of plant climbers. Survival differed between species, however, four species had their survival impaired by the incidence of climbers. Climber occurrence did not affect the growth of any transplanted species. Herbivory has positively affected the survival of two species while one species had its survival negatively affected. Regarding growth, the incidence of herbivory positively affected only one of the studied species. Neither diversity nor its interaction with herbivory and climbers affected tree growth and survival during the initial stages of Caatinga restoration. Because only one plant species was affected by herbivory, we suggest that no method of herbivory control should be applied in the first years of Caatinga restoration, but if applied methods should target the most sensitive species. This work suggests that species diversity does not have a relevant role on the early phases of restoration regarding its influence on survival, growth, incidence of climber and incidence of herbivory of transplanted plants. This experiment shows that plant climbers can have a negative effect on survival of transplanted tree saplings, even after frequent removal management. Therefore, new techniques to control plant climbers should be developed in future Caatinga restoration projects.

MEMBROS DA BANCA:
Presidente - 1677189 - GISLENE MARIA DA SILVA GANADE
Externa à Instituição - ADRIANA PELLEGRINI MANHÃES - UFRN
Externa à Instituição - MARINA ANTONGIOVANNI DA FONSECA