Banca de QUALIFICAÇÃO: LUAN GABRIEL ARAUJO GOEBEL

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : LUAN GABRIEL ARAUJO GOEBEL
DATA : 30/04/2024
HORA: 14:00
LOCAL: Sala de aula PPGCA
TÍTULO:

THE ACCELERATED DECLINE OF BIODIVERSITY IN THE ARC OF DEFORESTATION IN THE WESTERN AMAZON: PATTERNS, PROCESSES AND AN AGENDA FOR CONSERVATION

PALAVRAS-CHAVES:

Fragmentation; Deforestation; Conservation of biodiversity; Landscape ecology; Vertebrates

PÁGINAS: 87
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
SUBÁREA: Ecologia Aplicada
RESUMO:

The Amazon is one of the most biodiverse tropical forests in the world and plays a crucial role in maintaining global ecosystems. However, despite its biological and ecological importance, The Amazon faces unprecedented threats, including habitat fragmentation, loss and degradation, especially in the "Arc of Deforestation". As the frontiers of destruction advance, more than 18% of the original forest cover of the Brazilian Amazon has been converted into anthropized habitats. The state of Rondônia in Brazil is a striking example of this rapid and drastic reduction in native habitats. Therefore, in this thesis, using different methodological approaches, we evaluate the causes and effects of human modifications to the landscape of an important endemism zone in the Amazon and for the state of Rondônia. This thesis is structured in three chapters: in the first, "The spatio-temporal dynamics of vegetation cover and its configuration reveal an imminent threat in an Amazonian state", we examine the spatio-temporal change in Rondônia's vegetation cover between 1986 and 2020, using satellite images and landscape ecology metrics. Over the course of 35 years, there was a drastic reduction of 28.2% in Rondônia's vegetation cover, generating more than 100,000 fragments of natural vegetation with an average size of 150 hectares and a high degree of isolation. In Chapter 2, entitled "Under pressure: the rapid decline of bird and mammal diversity in an Amazonian endemism zone", we investigated how fragmentation, habitat loss, and environmental degradation can modulate bird and mammal communities in a little-studied endemism zone in the Amazon. We found that the effects of habitat and landscape act in combination in the 42 bird and mammal taxa. On the landscape scale, taxonomic and functional completeness was affected by the distance from the largest remnant in the region and by the proportion of agribusiness. At the habitat scale, completeness was modulated by fragment size, vegetation height, selective logging, and forest fires. In Chapter 3, which is still under construction, we intend to verify how changes in habitat and landscape affect the behavior of mammal species in a severely deforested and fragmented landscape, in terms of interspecific association and activity period.

MEMBROS DA BANCA:
Presidente - 71440008 - MANOEL DOS SANTOS FILHO
Interno - 118188003 - ERNANDES SOBREIRA OLIVEIRA JUNIOR
Interno - 704.948.001-00 - GUSTAVO CANALE - UFMT
Interno - 118181008 - WILKINSON LOPES LAZARO
Externo à Instituição - MARCELO MAGIOLI - USP
Externa à Instituição - MAÍRA BENCHIMOL DE SOUZA - UESC-BA