Banca de DEFESA: FABIO ANDRE GOMES SILVA CAVALCANTI

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : FABIO ANDRE GOMES SILVA CAVALCANTI
DATE: 21/12/2023
TIME: 08:30
LOCAL: Videoconferência
TITLE:

Diversity of drosophilids (Insecta, Diptera) in Ecological Reserves and Urban Parks of the Federal District

KEY WORDS:

beta diversity; Drosophilidae; richness; abundance; Zaprionus tuberculatus.

PAGES: 140
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Understanding the patterns and processes that govern the distribution, richness and abundance of species is one of the main goals of Ecology. Drosophilid communities in nature reserves and urban parks are excellent laboratories to study the structuring of species assemblages in these environments. The first chapter of this thesis investigates drosophilid assemblages in urban parks in the Federal District. Our study has shown that exotic species tend to be more abundant than neotropical species, confirming the idea that urban environments tend to favor generalist exotic species. The abundance of neotropical drosophilids was greater in parks further away from the city center, and there is a synergy between this distance and the size of the park. The abundance of exotic drosophilids responds to the human population density in the vicinity of the park, and to the synergy between this factor and the distance from the city center. We find no relationship between species richness and the environmental variables of the different parks. The second chapter relates the distance between parks and reserves to beta diversity, in terms of turnover and nesting. Based on the richness and abundance of drosophilids, beta diversity was moderate between parks and reserves. Dissimilarity was mainly associated with the turnover mechanism (in 89% of cases for richness and 99.9% for abundance). Regarding species richness, the dissimilarity between the Águas Emendadas Ecological Station and the parks increases with distance. In terms of relative species abundance, the dissimilarity between the Brasília National Park – an important protected area the DF (reserve) – and the urban parks also increases with distance. Finally, in the third chapter we report the first occurrence of the Afrotropical species Zaprionus tuberculatus Malloch in the Americas. This species has been recognized as invasive by the Invasive Species Compendium, and I argue that it is likely to impact the Cerrado biome, a biodiversity hotspot where drosophilid communities have been monitored since 1998.

COMMITTEE MEMBERS:
Externo à Instituição - MARCO SILVA GOTTSCHALK - UFPel
Externo à Instituição - ANDRÉ VICTOR LUCCI FREITAS - UNICAMP
Interno - 1653455 - EMERSON MONTEIRO VIEIRA
Interna - 2476936 - MARINA REGINA FRIZZAS
Presidente - 1194783 - ROSANA TIDON