Banca de QUALIFICAÇÃO: JOÃO PAULO TAVARES DAMASCENO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : JOÃO PAULO TAVARES DAMASCENO
DATE: 16/11/2020
TIME: 14:00
LOCAL: remoto
TITLE:

SHOREBIRDS CONSERVATION IN BRAZIL: UNDERSTANDING THE PRESENT, KNOWING THE FUTURE

KEY WORDS:

Wetlands;Migration;Habitat loss;Engagement by society;Habitats protection

PAGES: 95
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Shorebirds are considered one of the most impressive groups of birds due to their long migratory movements between breeding and wintering sites located in wetlands, and sometimes located in different hemispheres. This complex movement associated with the great diversity of habitats used by species during migration also implies threats at different scales, and a challenge for conservationist policies that prioritize the protection of wetlands. Despite international efforts and the creation of a national instrument for the conservation of the group, few areas have been implemented for the protection and, in addition, information on threats and impacts has been little accessed and discussed. To access information on patterns of richness, distribution, migratory flyways and how the habitats used by these species will respond to climate change in the future, we have developed the present thesis in two chapters. In chapter 1, we access the occurrence records of 28 species of shorebirds in the Brazil to access patterns of distribution, movement, and richness of migratory and resident shorebirds, using the kernel density method and generalized additive models. Our results revealed two distribution patterns accessed by the projections of the kernel estimates: some species occurred more widely distributed, mainly along coastal and inland areas, and another species with more restricted records, mainly along the coastline. These data also show movement patterns that varied for species, with some migrating only along the Atlantic flyways, and others using both flyways (Atlantic and central flyways). For the models, the best candidate model explained 97% of the data and it was influenced by the agricultural, forest remnants, urbanism, beaches and dunes and non-forested natural areas, the first two affecting negatively the shorebirds richness and the last three positively. In Chapter 2, we combine occurrence records with climate, topography and land cover data, to model the habitats availability of resident and migratory shorebirds in Brazil, and to identify how their habitats will be affected in future forecasts of different scenarios of carbon concentration (RCP 4.5 and RCP 8.5). Our results showed that both RCP’s scenarios indicated a balance of losses greater than that of gains, with most predicted species losing more than 50% of their projected habitats for 2050 and 2070. Still, using binary maps produced through estimates for each species, our projections revealed important areas located along the southeast, north and south coast of the country, regions in the Pantanal and along the Amazon River, which are also expected to suffer severe habitats losses in the future. Our results collaborate with additional information on distribution, migratory patterns and future perspectives of the consequences of climate change on habitats used by shorebirds in Brazil, raising the need for greater engagement by society and more restrictive public policies to protect their habitats.

BANKING MEMBERS:
Externo à Instituição - ANDERSON GUZZI
Interno - 2319234 - GUILHERME ORTIGARA LONGO
Presidente - 1439088 - MAURO PICHORIM