Herbert Junior Campos Peixoto

Mr. Herbert Junior Campos Peixoto


Research Focus & Metrics

Academic Career Length

9Years (2018-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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3 February 2025 in Caderno Pedagógico
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POPATRICIA CHAVES OLIVEIRA
PATRICIA CHAVES OLIVEIRA
NFNorbert Fenzl
Norbert Fenzl
LLLuís Otávio Do Canto Lopes
Luís Otávio Do Canto Lopes
KGKassiana Renê Gomes
Kassiana Renê Gomes
MSMarcia Cristina Santos
Marcia Cristina Santos
ESEvelyn Rafaelle de Oliveira Souza
Evelyn Rafaelle de Oliveira Souza
O arquipélago flúvio-marítimo do Marajó na costa do Pará, é um ambiente diverso, tanto do ponto de vista ambiental quanto cultural. Atualmente, essa região já sofre com os impactos das mudanças climáticas, como a erosão costeira e o avanço do mar. Considerando que as principais atividades da Bioeconomia de populações tradicionais no Marajó são o extrativismo vegetal e a pesca historicamente praticada, então quais seriam esses impactos climáticos sob a ótica de quem vive diariamente a floresta, o manguezal e o mar, sendo esta a principal questão científica da pesquisa. A metodologia caracterizou-se pela utilização de questionários semiestruturados e análise das narrativas de agroextrativistas e pescadores a partir de amostragens seguindo o método Snowball sampling. Também foram calculados a Razão de Extrativismo/Agricultura (REA) ou Razão D’Cleyton e a Razão de Vulnerabilidade Extrativista (RVE). Os resultados demonstraram a partir das narrativas que as seguintes espécies já são vulneráveis a partir de dois fatores combinados, superexploração associada às mudanças climáticas, são elas: Cocos nucifera, Mangifera indica, Manilkara achras; Astrocaryum tucuma, Talisia esculenta, Crescentia cujete, Physalis pubescens; Cocos nucifera, Ucides cordatus. Essas espécies são, portanto, indicadores de riscos socioeconômicos e ambientais, que podem ser úteis no desenvolvimento de políticas públicas capazes de mitigar os efeitos das anomalias climáticas locais. Por fim, foi elaborado um Atlas como instrumento de popularização dos resultados científicos encontrados. Este Atlas é uma obra pedagógica que expressa a contribuição para a educação ambiental crítica, local, costeira e amazônica em contextos de mudanças sociais, econômicas e climáticas globais.

1 May 2018 in Journal of Coastal Research
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Journal Article
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HPHerbert Junior Campos Peixoto
Herbert Junior Campos Peixoto
LBLizandra Pantoja Baia
Lizandra Pantoja Baia
Débora Rodrigues PereiraDébora Rodrigues Pereira
Débora Rodrigues Pereira
MRMarcelo Rollnic
Marcelo Rollnic
SMSury de Moura Monteiro
Sury de Moura Monteiro
Peixoto, H.J.C.; Baia, L.P.; Pereira, D.R.; Rollnic, M., and Monteiro, S.M., 2018. Sedimentological Sectorization Model in an Amazonian Estuary. In: Shim, J.-S.; Chun, I., and Lim, H.S. (eds.), Proceedings from the International Coastal Symposium (ICS) 2018 (Busan, Republic of Korea). Journal of Coastal Research, Special Issue No. 85, pp. 91–95. Coconut Creek (Florida), ISSN 0749-0208. The aim of this study is to check whether a macro tide-dominated Amazonian estuary might be separated in sectors according to recent sediment distribution, considering local hydrodynamics. The case study was conducted in the river Mojuim estuary (−0.72° and −48.00°), situated between the Pará River mouth and the Atlantic Ocean, northeastern Pará, Brazil. A total of 117 superficial sediment samples were collected using a Van Veen dredge in the lower estuary (16 km). Stations are equidistant and encompass margins and estuarine channel. We performed a sieving granulometric analysis and a calcination analysis of total organic matter and total calcium carbonate content (360° and 1000° C, respectively). Were used a multivariate statistical treatment to separate the estuary in sectors, with clustering analysis and principal component analysis (PCA). Recent sediment distribution of the river Mojuim estuary is characterized by fine, platykurtic, and poorly selected sediments (0.63–125 mm) with low organic matter content (5.8% ±0.30) and carbonate (2.4% ±0.04). The river Mojuim estuary is divided in three sedimentation subenvironments: 1) marine domain, located in the estuary mouth, with predominance of moderately selected sandy sediment, where reworking and sedimentary distribution are influenced by tidal currents; 2) river estuarine domain, with predominance of poorly selected muddy sediment, where sedimentation is influenced by river discharge; and 3) a transitional sector with sediments typical of both environments. The Mojuim estuary might be divided in sectors according to recent sedimentary distribution, However, it differs from classic model as it has: 1) a mixed mouth, where the East channel has marine characteristics (93%) and the West channel has transitional (20.7%) and freshwater characteristics; 2) widespread distribution of CaCO3 throughout the estuary, with higher contents in the freshwater zone. Supplementary hydrochemical analyses are required to understand the processes that define these differences in the sedimentological sectorization of Amazon estuaries.

1 May 2020 in Journal of Coastal Research
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FLFabrício Lobo
Fabrício Lobo
HPHerbert Junior Campos Peixoto
Herbert Junior Campos Peixoto
TBThaís Borba
Thaís Borba
SMSury Monteiro
Sury Monteiro
MRMarcelo Rollnic
Marcelo Rollnic
Lobo, F.C.; Peixoto, H.J.C.; Borba, T.A.; Monteiro, S.M., and Rollnic, M., 2020. Multitemporal variability in a river-estuarine island. In: Malvárez, G. and Navas, F. (eds.), Global Coastal Issues of 2020. Journal of Coastal Research, Special Issue No. 95, pp. 865–869. Coconut Creek (Florida), ISSN 0749-0208.Cotijuba Island, in Northern Brazil (1°14.249′S, 48°32.806′W), has typical characteristics of Amazon lowlands, such as low and smooth topography and the presence of cliffs surrounding its river-estuarine beaches. The beach environment on this island has morphological variations determined by hydrodynamics of the Pará River estuary (mesotides and mean annual outflow of 104 m3s-1), climatic seasonality in the region, and anthropogenic changes. Thus, it was investigated how coastal morphological changes occur on the beaches of Cotijuba Island at different temporal scales, considering regional seasonality. The polygons methodology was used based on Landsat satellite images taken in 1987, 1998, 2008, and 2017, and on in situ measurements of morphological variations of the beaches in 2018 using topographic profiles taken with a digital level GEOMAX ZDL 700, covering 8.7 km of beaches that are bathed by the Pará River estuary. Cotijuba Island seems to have little or no influence from long-term climatic conditions, as the ENSO phenomena. Although climatic influence is evident at short-term temporal scales, it is worth emphasizing that the physiographic features of the beaches, such as the presence of perennial and temporary channels, and of rocky outcrops, also affect morphodynamic changes on the beaches, especially at a small temporal scale.

1 December 2023 in OBSERVATÓRIO DE LA ECONOMÍA LATINOAMERICANA
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OCOtávio Do Canto
Otávio Do Canto
NFNorbert Fenzl
Norbert Fenzl
MSMárcia Santos
Márcia Santos
HPHerbert Junior Campos Peixoto
Herbert Junior Campos Peixoto
ESEvelyn Souza
Evelyn Souza
JTJean Teixeira
Jean Teixeira
Esta pesquisa visou analisar o crescimento da ocupação da Praia de Crispim e os conflitos socioambientais relacionados a esse processo. Desde que a população tomou conhecimento da obra de construção de um muro de contenção da erosão e uma orla no local, o número de novas construções na praia e seu entorno tem aumentado consideravelmente. Este debate demonstra-se fundamental diante da relevância da praia no contexto local e regional, e sua proximidade em relação à RESEX Marinha Mestre Lucindo e a abundância de mangues, restingas e dunas. Para atingir o objetivo proposto, realizou-se um levantamento bibliográfico, foram obtidas imagens de satélite da área e houveram algumas viagens a campo. Verificou-se o crescimento substancial da ocupação desordenada, da destinação inadequada de resíduos sólidos e da degradação de ambientes naturais no local. Por fim, sugere-se que a gestão local estabeleça um ordenamento territorial integrado e participativo para melhor lidar com este quadro.