Banca de QUALIFICAÇÃO: LUDMILLE ESPÍNOLA DE MEDEIROS

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : LUDMILLE ESPÍNOLA DE MEDEIROS
DATE: 15/07/2024
TIME: 10:00
LOCAL: DEPARTAMENTO DE OCEONOGRAFIA E LIMNOLOGIA (DOL) E GOOGLE MEET
TITLE:

Distribuição de espécies de cianobactérias potencialmente tóxicas: uma previsão baseada em modelos de nicho ecológico

KEY WORDS:

Climate suitability; Blooms; Climate changes ;Reservoirs ; Toxins

PAGES: 12
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Cyanobacteria are among the oldest forms of life on Earth, they occur in marine and freshwater environments grouping together in colonies or filaments. Additionally, many species of cyanobacteria can form potentially toxic blooms. In the Brazilian semi-arid region, the occurrence of these organisms is widely recorded in multiple-use reservoirs, which causes great concern not only about the impacts on biodiversity but also on human health. The present work aimed to investigate the main climatic conditions that may influence the current distribution and potential future expansion of three species of colonial cyanobacteria and three potentially toxin-producing filamentous cyanobacteria in the region through the ecological niche modeling approach. The areas suitable for the establishment of these populations were estimated, associating the known occurrence points with the bioclimatic variables and the climate scenarios, SSP245 and SSP585, designed for the Intergovernmental Panel on Climate Change (IPCC) considering the present time and two time intervals (2021-2040 and 2081-2100). Isothermality, annual temperature variation, precipitation volume of the wettest, coldest and driest quarter including elevation were the variables that most contributed to the species distribution. The projections obtained showed that the Brazilian semi-arid region has high climatic suitability for the occurrence of all species studied, but the models indicated the expansion of habitat suitability in the future only for Microcystis aeruginosa (colonial) and Planktothrix agardhii (filamentous) in both the moderate scenario as well as in the pessimistic climate change scenario. It is expected that the predictions obtained through ecological niche models, given the current scenario as well as climate change, can be used as an early warning in the control and proliferation of potentially toxic cyanobacteria.

COMMITTEE MEMBERS:
Externo à Instituição - GEOVANI ARNHOLD MORESCO - UEM
Presidente - 2412921 - JULIANA DEO DIAS
Interna - 1764855 - VANESSA BECKER