Banca de DEFESA: IANA TAVARES FAVERO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : IANA TAVARES FAVERO
DATE: 27/08/2021
TIME: 13:50
LOCAL: Sala virtual
TITLE:

Habitat Suitability Patterns and Impacts for the American Manatee, Trichechus manatus, on the Brazilian Coast

KEY WORDS:

Ensemble;distribution modeling;potential distribution;cumulative impact;marine mammals

PAGES: 66
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

The manatee, Trichechus manatus, is classified as an Endangered species in Brazil, with an estimated population of 1100 individuals and threatened by habitat loss and fragmentation. This study aimed to investigate the suitability of the habitat available for the species along the Brazilian coast, as well as the degree of cumulative impact. For this, an ensemble forecast was created from 120 habitat suitability models built using the BIOCLIM, Domain, Mahalanobis, GLM, Maxent and SVM algorithms, based on important environmental variables for manatee distribution. The suitability results obtained were used to build T. manatus potential distribution map and compared to the degree of cumulative impact observed in the coast of Brazil. Areas of low suitability for the species were found in the mouth of the Amazon River, and in parts of the coast of Maranhão, and Rio Grande do Norte. The areas of high suitability are more consolidated between the east coast of Ceará and the coast of Alagoas states, with patches of high suitability also on the coast of Piauí and Maranhão states. The southern limit of potential distribution observed was the Todos-os-Santos Bay, in the state of Bahia. Cumulative impact analyzes indicate that most of the high suitability areas are under low impact. It was also observed that the areas of high suitability and high cumulative impact are concentrated in the Northeastern Brazilian coast, especially close to the state capitals. Continuous patches of high cumulative impact were also observed from the Parnaíba River Delta to the Piauí-Ceará border, and along the entire coast of the state of Pernambuco. The results found in this study can help in the development of conservation strategies for the species along the entire coast of Brazil, supporting decision-making and the allocation of resources more efficiently.  

BANKING MEMBERS:
Externo à Instituição - RODRIGO HIPÓLITO TARDIN OLIVEIRA - UFRJ
Presidente - 1718346 - EDUARDO MARTINS VENTICINQUE
Interno - 1715227 - GABRIEL CORREA COSTA