Banca de DEFESA: ARINOS OLIVEIRA SERPA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : ARINOS OLIVEIRA SERPA
DATA : 12/10/2019
HORA: 14:00
LOCAL: Sala da pós-graduação
TÍTULO:

Thermal physiology and extinction risk induced by climate changes in Gymnodactylus amarali (Squamata, Phyllodactylidae)

PALAVRAS-CHAVES:

Climate change, mechanistic models, geographic distribution, lizards, Cerrado, conservation

PÁGINAS: 32
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
SUBÁREA: Ecologia Aplicada
RESUMO:

The rapid pace of climate change poses a major threat to biodiversity conservation and unraveling how it will impact different species is a major obstacle to overcome. Because they depend on the ambient temperature for their thermoregulation, ectothermic animals are good models to understand these processes. Gymnodactylus amarali is an endemic lizard of the Cerrado, has nocturnal habits and preferentially inhabits rocky outcrops. In this study we investigate the thermal characteristics, calculate the restriction of the activity period, describe the thermal performance curve, create species distribution models based on environmental and ecophysiological data and, from them, evaluate the impact of different concentration scenarios of greenhouse gases and land use on the distribution of environmental suitability areas for the species. Our results show that the preferred and body temperatures are 26.03 ° C and 29.52 ° C, respectively. The species distribution model used for the suitability area calculations had an AUC of 95%. Today there has been a loss, due to deforestation, of 48% of areas that could be occupied by the species. In the RCP 4.5 scenario for the year 2050 these losses rise to 63% and reach 81% for the year 2070. In the RCP 8.5 scenario the losses are 79% for 2050 and 95% for 2070. When we consider different land use models, losses range from 55 to 99%. Our predictions indicate that reduced hours of activity, nocturnal habit, thermoforming ectothermy and micro-habitat specificity, together with marked reduction in suitability areas, determine a high risk of G. amarali extinction due to predicted environmental changes until the end of the century.

MEMBROS DA BANCA:
Presidente - 506.486.166-49 - GUARINO RINALDI COLLI - UnB
Interno - 132029001 - EDDIE LENZA DE OLIVEIRA
Externo ao Programa - 295695001 - FABIANO CORRÊA
Externo à Instituição - DIVINO VICENTE SILVÉRIO - IPAM
Externo à Instituição - PAULO MONTEIRO BRANDO - IPAM