Banca de DEFESA: Ademar Barbosa Dantas Junior

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : Ademar Barbosa Dantas Junior
DATE: 28/08/2023
TIME: 14:30
LOCAL: Auditório 4 do IB
TITLE:

"I want to break free”: Unraveling the Response of Shrubs to Fire Outside the Woody Layer

KEY WORDS:

Cerrado; Neotropical Savannas; Fire adaptations; Fire Stimulated Flowering; Resprout; Prescribed Fires;

PAGES: 37
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Functional responses within the plant community are constrained by the fire regime, making imperative an understanding of the variety plant strategies among species and functional groups to ensure effective management. In savanna biomes, grasses, herbs, shrubs, and trees form a continuum, which range from the herbaceous to the woody layer. Shrubs play a vital role in the landscape, acting as a linking component between the herbaceous and woody layer. However, shrubs are seldom addressed in studies on fire impacts in the Cerrado, with the majority of knowledge on the woody layer focused on tree species. The aim of this work was to measure the effects of fire on shrub structure by assessing recovery of vegetative organs and estimating differences in reproductive organ production. The experimental fires were set at the end of the rainy season six plots was burned independently as a head fire. Davilla elliptica A.St.-Hil., Heteropterys campestris A.Juss., and Protium ovatum Engl., are the species target of this study. Before the burn there were no significant differences between the species in terms of height or diameter. As result of the burn, we observed a high occurrence of topkill, mainly in the species with lower diameter. All species presented a high number of resprouts reaching 10 resprouts/individual. The diameter was not recovered within the period o 1 year, as well as the length of resprout was lower than the height before the burn. Notably, H. campestris and P. ovatum showed a reproduction fire stimulated. In this study we presented the strategies of shrubs against fire and how it contrasts with trees.

COMMITTEE MEMBERS:
Interna - 5192951 - CASSIA BEATRIZ RODRIGUES MUNHOZ
Externa ao Programa - 1803800 - GABRIELA BIELEFELD NARDOTTO - UnBPresidente - 404908 - HELOISA SINATORA MIRANDA
Externa à Instituição - LETICIA GOMES DA SILVA - ITV