Banca de DEFESA: ELLEN RODRIGUES FERMIN

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE: ELLEN RODRIGUES FERMIN
DATA: 25/04/2023
HORA: 08:00
LOCAL: remoto
TÍTULO:

ROAD- RELATED FEATURES THAT PROMOTE MAMMAL ROAD CROSSINGS

PALAVRAS-CHAVES:

Carnivores, Ungulates, Mammals, Road effects, Road crossings

PÁGINAS: 50
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
SUBÁREA: Ecologia Aplicada
RESUMO:

Research indicates that the probability of roadkill can be explained by certain road-related features. However, it is not yet clear which road features may help individuals cross roads safely. The goal of our study was analyzed road-related features that might explain successful crossing incidence of mammals, carnivores, ungulates, brown bears (Ursos arctos) from Canada and Greece, cheetah (Acinonyx jubatus), cougars (Puma concolor), european lynx (Lynx lynx), roe deer (Capreolus capreolus) and wapiti (Cervus canadensis). Firstly, we analyzed road-features that explain the incidence of crossings by compiling 2201 stretches of roads with road crossings from 14 species in several regions worldwide. Subsequently, separately carnivores and ungulates, and after by species with more than 50 stretches recorded. We estimated the number of successful crossings in road segments of 500m length and described the road segments with nine road-related features (number of lanes, exclusion fence, stream crossing, stream in parallel, road topography, distance to the nearest curve, rod verge, connectivity of open areas and percentage of closed areas) using Google Street View. Ten generalized linear mixed model were created using road segments with high and low incidence of crossings as the binary response variable to analyze the relationship between road features, with species and study areas as random effects. We found that the number of lanes decreased the probability of incidence of crossings in mammals and carnivores models. The exclusion fence had a significant negative effect in ungulates model and brown bear from Canada model. In the GLMM of mammals and brown bears, the streams crossings had a significant negative effect on the incidence of crossings. For carnivores and brown bears, from Greece, the distance of stream in parallel had a negative effect to the incidence of crossings, on another hand, for cheetah and wapiti had a positive effect. The topography of road had a significant positive effect on incidence of crossings of brown bears from Canada, however the opposite effect on brown bears from Greece. For mammals, carnivores and brown bear from Canada, the distance to the nearest curve increased the incidence of crossings. The road verge had significant negative effect on brown bear from Greece, while had a positive effect on GLMM of brown bears from Canada. For cougars and european lynx, the connectivity of open areas had a significant negative effect, however the same feature had a significant positive effect on Brown bears from Greece and roe deer. The percentage of closed area only had a significant negative effect on cheetas.  Our findings suggest there is no a road-related feature included in every model, but features such as stream in parallel, distance to the nearest curve, connectivity of open areas were significantly in three or more models can be analyzed to create the mitigation measures.

MEMBROS DA BANCA:
Externo à Instituição - SIMONE RODRIGUES DE FREITAS - UFABC (Membro)
Externo à Instituição - LARISSA OLIVERIRA GONÇALVES - ESALQ (Membro)
Interno - CÁSSIO ALENCAR NUNES - UFLA (Suplente)
Externo à Instituição - CLARISSA ALVES DA ROSA - INPA (Suplente)
Presidente - CLARA BENTES GRILO - ULISBOA (Membro)