Banca de DEFESA: RICARDO CEZAR RAMOS NICOLAU

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : RICARDO CEZAR RAMOS NICOLAU
DATA : 03/12/2021
HORA: 14:00
LOCAL: Banca remota - Google Meet: https://meet.google.com/sfc-pabt-whz
TÍTULO:

Response of the termite community (Blattodea: Isoptera) to the regeneration time of Brazilian Savanna (Cerrado) areas in Itirapina, São Paulo

PÁGINAS: 54
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
SUBÁREA: Ecologia de Ecossistemas
RESUMO:

The present work aims to use termites (Insecta: Blattodea) to understand how the recovery of the Cerrado (a Brazilian Savannah) occurs in plantation areas and in those previously used for Pinus plantations and left to regenerate after logging. Termites were sampled in 15 areas, three of them were Cerrado and the other 12 were used for Pinus plantations, five of them intact, and the others with different logging ages, so as to include three areas with older clearcuts (7 to 9 years) and four with more recent clearcuts (1 to 2 years). In each area, 10 plots of 5 m² (2.0 m x 2.5 m) were sampled, distributed in two transects containing five plots at least 10 m apart from each other. Each plot was examined by a collector for 30 minutes. Analyses of alpha and beta diversity (comparing richness, abundance and composition), proportion of feeding groups, and calculation of the IndVal of species were performed. Our prediction was that termite diversity would be higher in the preserved cerrado areas, followed by areas where Pinus logging has been occurring for a longer period of time, then in Pinus plantations and finally in recently clearcut areas. Humivorous termites were the most diverse and abundant in cerrado areas and much less diverse in areas affected by recent human disturbance (1 to 2 years) left for regeneration. In plantations and areas with longer regeneration time (7 to 9 years) the abundance and diversity of this group and intermediates was moderately decreased. In degraded areas these groups gave way to xylophages, which were not very diverse, but very abundant. Environmental variables, such as soil and minimum distance from a preserved area, did not explain the variation in distribution by time classes. This study concludes that the regeneration dynamics in cerrado areas after Pinus logging occurs in such a way that the little diverse and generalist xylophages are gradually replaced by humivores and intermediates, which are more diverse in areas with more time of regeneration. Soon the community tends to restructure in a similar way to the original cerrado.

MEMBROS DA BANCA:
Presidente - Interno ao Programa - 1308531 - TIAGO FERNANDES CARRIJO
Membro Titular - Examinador(a) Interno ao Programa - 1848397 - ALBERTO JOSE ARAB OLAVARRIETA
Membro Titular - Examinador(a) Externo à Instituição - ARLEU BARBOSA VIANA JUNIOR - UFPA
Membro Suplente - Examinador(a) Interno ao Programa - 1804548 - RICARDO JANNINI SAWAYA
Membro Suplente - Examinador(a) Externo à Instituição - THIAGO SANTOS - UFVJM