Banca de DEFESA: CARMINO EMIDIO JÚNIOR

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : CARMINO EMIDIO JÚNIOR
DATA : 30/05/2025
HORA: 14:00
LOCAL: Universidade do Estado de Mato Grosso - Nova Xavantina
TÍTULO:

LEGACY OF ANTHROPOGENIC ACTIONS: HOW DOES LAND USE CHANGE AFFECT BIODIVERSITY IN NEOTROPICAL FRESHWATER ECOSYSTEMS?

PALAVRAS-CHAVES:

floristic attributes; land use; aquatic ecology; diversity

 

PÁGINAS: 86
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
RESUMO:

The impacts of anthropogenic factors, such as the removal of riparian vegetation and changes in land use, have caused profound alterations to fish communities in tropical freshwater ecosystems. In the first chapter we analysed 349 drainage basins in the Amazon, Araguaia-Tocantins and Prata hydrographic macro-regions. Our aim was to understand the relationship between fish species richness and turnover and environmental variables such as age of deforestation, proportion of native vegetation and net primary productivity in tropical aquatic ecosystems. In the second chapter we assessed 10 drainage basins of headwater streams in the Cerrado-Amazon transition. Here we investigated how functional attributes of riparian vegetation, land-use variables and severe drought events influence species turnover and the taxonomic diversity of fish, with collections made before and after severe drought. The results indicated that fish richness and diversity are positively associated with the functional diversity of riparian vegetation, especially in attributes such as calcium and leaf thickness. Agricultural watersheds showed more homogeneous communities and species indicative of degraded environments. In the river basins, greater richness was recorded in the Amazon, while past deforestation and less native vegetation cover reduced species diversity and renewal in all regions. Thus, we found that changes in land use and degradation of riparian vegetation simplify fish communities, reducing heterogeneity. Conservation of riparian vegetation and sustainable watershed management are crucial to preserving biodiversity and ecosystem resilience in the face of deforestation, climate change and extreme events. 

MEMBROS DA BANCA:
Interno - 996.005.011-49 - DIVINO VICENTE SILVÉRIO - UnB
Interna - 480666201 - MÔNICA APARECIDA CUPERTINO EISENLOHR
Interna - 126862002 - Nubia França da Silva Giehl
Externo à Instituição - LUCAS PAOLUCCI - UFV
Externo à Instituição - MURILO SVERSUT DIAS - UnB