Banca de DEFESA: NATHÁLIA NAPOLE DE OLIVEIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : NATHÁLIA NAPOLE DE OLIVEIRA
DATE: 31/05/2022
TIME: 09:00
LOCAL: Google Meet
TITLE:

EFFECTS OF LARGE HYDROELECTRIC PLANTS ON ARTISANAL FISHERIES IN FRESH WATER SYSTEMS


KEY WORDS:

Subsistence; Belo Monte; Networks; Fishing; Co-occurrence


PAGES: 35
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Large hydroelectric power plants (HPP) impact subsistence fishing. Despite that, few studies have delved into these impacts. In the present research, we aim to evaluate the impacts of UHE Belo Monte on fish co-occurrence networks. Specifically, we seek to analyze these networks considering the areas of influence of the plant (upstream, reservoir, stretch of reduced flow and downstream) between two periods (2012-2015 and 2016-2020), identify the key fish groups for each region in the period operation of the enterprise (2016-2020) and discuss how changes in subsistence fishing can affect food security for populations dependent on these resources. Our hypothesis is that there is replacement of species that co-occur in subsistence fisheries between different areas of influence of the HPP. Since changes in local diversity influence the decline in fishery resource diversity, we also hypothesize that species groups will be distinct between the previous period (2012-2015) and the period of operation of the HPP (2016-2020). The database used in this study comes from the monitoring of subsistence fisheries carried out between the municipalities of Altamira and Porto de Moz, Pará, Brazil. The analysis of the cooccurrence models was based on graph theory. The models resulting from the 2016-2020 period were used to design new networks with removal of the core species groups. As a result, we saw that the groups of species vary between the areas of influence and downstream is the one with the highest number. Among the periods, the one that presented more groups of species was the one before the operation of the HPP.
The projections showed significant alterations in the conformation of the co-occurrence networks, mainly for the reduced flow section. We conclude that UHE Belo Monte has an impact on subsistence fisheries in the region, altering the composition of fishery resources in space and time.


BANKING MEMBERS:
Externo à Instituição - EDER MILENO DILVA DE PAULA - UFPA
Externa à Instituição - MONALISA RODRIGUES OLIVEIRA DA SILVA
Interna - 1718747 - PRISCILA FABIANA MACEDO LOPES
Notícia cadastrada em: 21/05/2022 09:58
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