Banca de DEFESA: RAQUEL CETTO SAMPAIO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : RAQUEL CETTO SAMPAIO
DATE: 04/12/2023
TIME: 13:30
LOCAL: on-line
TITLE:

Conservation of ant diversity in fragments of secondary forests: The effect of vegetation structure in different seasonal periods

KEY WORDS:

Diversity partitioning, CCA, Environmental variables, Seasonality

PAGES: 32
BIG AREA: Ciências Biológicas
AREA: Zoologia
SUBÁREA: Zoologia Aplicada
SUMMARY:

The destruction of forest habitats generates extremely fragmented areas and alterations in
vegetation structure. This modifies the characteristics of micro-habitats and resource
availability, affecting the diversity of animal species. Ants have become an important
model for studying the effects of environmental disturbances on biodiversity because they
exhibit high abundance, diversity, and ecological relevance. Some ant species forage for
various resources on trees and shrubs; therefore, an analysis of vegetation structure can
help understand the diversity patterns of these organisms. Abiotic factors, such as
seasonality, can also influence ant community diversity. Based on this, the objective of
this study was to investigate the distribution of species diversity of ants foraging on
plants in fragments of secondary forests during different seasonal periods. The study was
conducted in eight forest fragments in the region dominated by semi-deciduous
ombrophilous forests in the Paraíba River Valley, State of Rio de Janeiro. Additive
diversity partitioning, β diversity partitioning, and canonical correspondence analysis
were used to measure the effect of seasonality and vegetation structure on the distribution
of ant species diversity. The rainy season positively influenced the diversity of ants
foraging on plants. Composition was affected by shrub leaf density in the rainy season
and tree diameter in the dry season. Each fragment preserved a different set of ant
species, and vegetation structure positively influenced ant diversity. These results
highlight the importance of conserving the majority of forest fragments to better preserve
the regional set of ant species.

COMMITTEE MEMBERS:
Externo à Instituição - DIEGO VINÍCIUS ANJOS SILVA - UFU
Externo ao Programa - 1767348 - FABIO SOUTO DE ALMEIDA - UFRRJExterno à Instituição - JACQUES HUBERT CHARLES DELABIE - UESC
Interno - 1356331 - JARBAS MARCAL DE QUEIROZ
Interno - 1728466 - JAYME MAGALHAES SANTANGELO