Mestrado em Oceanografia Ambiental

URI Permanente para esta coleção

http://repositorio.ufes.br/handle/10/17532

Nível: Mestrado Acadêmico
Ano de início: 2007
Conceito atual na CAPES: 4
Ato normativo: Homologado pelo CNE(Portaria MEC Nº 609 de 14/03/2019) Publicação no DOU em 18/03/2019 Seç. 1, Pág. 63. Parecer CNE/CES nº 487/2018, Processo no 23001.000335/2018-51).
Periodicidade de seleção: Anual
Área(s) de concentração: Sistemas Costeiros e Marinhos
Url do curso: https://oceanografia.ufes.br/pt-br/pos-graduacao/PPGOA/detalhes-do-curso?id=1468

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Agora exibindo 1 - 5 de 96

Soil and tree-stem co₂ and ch₄ fluxes from living and dead mangrove forests in se Brazil
(Universidade Federal do Espírito Santo, 2026-03-17) Lima, Layza Roxanne Santana de; Coppo, Gabriel Carvalho; https://orcid.org/0000-0001-5153-6540; http://lattes.cnpq.br/8862592977158801; Bernardino, Ângelo Fraga; https://orcid.org/0000-0002-1838-4597; http://lattes.cnpq.br/7955326454008127; https://orcid.org/0000-0002-7187-4392; http://lattes.cnpq.br/9804051918088513; Nóbrega, Gabriel Nuto; https://orcid.org/0000-0001-7008-4201; http://lattes.cnpq.br/5874908096941660; Joyeux, Jean-Christophe; http://lattes.cnpq.br/9764759048676848
Although mangrove forests are essential to blue carbon dynamics in coastal zones, relatively little is known about the greenhouse gas (GHG) fluxes emitted by these ecosystems. In this study, we investigated soil- and tree-mediated GHG fluxes in living and dead mangrove forests within a polyhaline estuary in southeastern Brazil, with the aim of assessing the effects of forest mortality on soil and tree-stem CO₂ and CH₄ fluxes. Because CO₂ fluxes are partially mediated by aerobic plant respiration, and methane fluxes from soils and tree stems are influenced by the balance between microbial production and oxidation, we expected lower GHG fluxes in dead mangrove forests. However, our results showed that living and dead mangroves exhibited comparable mean soil CO₂ fluxes, with mean annual values of 70.8 ± 25.0 and 74.0 ± 27.1 mmol m⁻² d⁻¹, respectively. Mean soil CH₄ fluxes were also similar between live and dead mangrove forests, ranging from 205 ± 238 to 244 ± 130 µmol m⁻² d⁻¹, with methane contributing only 2–3% of total CO₂-equivalent emissions. We further observed a seasonal effect on soil CO₂ fluxes, with higher emissions during summer compared to winter, whereas soil CH₄ fluxes showed no consistent seasonal variation. Water column height, used as a daily-integrated proxy of inundation conditions, influenced soil CO₂ and CH₄ flux variability, regardless of forest condition.. Tree-stem CO₂ fluxes decreased along the vertical gradient of the stem, indicating diffusion-dominated passive transport, while tree-stem CH₄ fluxes were negligible. When integrated and extrapolated to the studied estuarine region, ecosystem-scale GHG emissions were overwhelmingly dominated by soil processes (>99%) under both mangrove conditions.
Whale-watching no Espírito Santo: o turismo de observação de baleias a partir da oceanografia socioambiental
(Universidade Federal do Espírito Santo, 2025-02-26) Peterle, Pilsen Ca’lía da Costa; Zappes, Camilah Antunes; https://orcid.org/0000-0002-5486-6577; http://lattes.cnpq.br/0217232489124641; https://orcid.org/0009-0002-5462-9405; http://lattes.cnpq.br/5869807379230270; Barroso, Gilberto Fonseca; https://orcid.org/0000-0002-4886-4890; http://lattes.cnpq.br/8505958970169325; Jabor, Pablo Medeiros; https://orcid.org/0000-0002-3580-8937; http://lattes.cnpq.br/1542876666875683
Whale watching tourism, driven by the population increase of the humpback whale (Megaptera novaeangliae), has become a growing activity in the southeastern region of Brazil, particularly in Espírito Santo (ES), with increasing relevance for environmental conservation and socioeconomic development. However, there are still gaps in the scientific literature regarding its practice in the region. This study aims to analyze, based on stakeholders' perceptions, the forms of use and socio-environmental impacts of whale watching tourism in the coastal metropolitan region of Espírito Santo (ES), southeastern Brazil. From June 2023 to February 2024, interviews were conducted through questionnaires and field diary records. Data analysis involved the use of descriptive statistics, Discourse Analysis, and Triangulation to integrate and confront the information collected. Thirty-six stakeholders were interviewed, including representatives from the public sector (n=21), private sector (n=8), and the third sector (n=7). According to the respondents, the activity, primarily conducted between July and November, shows high potential to promote environmental, economic, and social benefits. The majority of respondents (78%; n=28) recognized its contribution to marine conservation, strengthening the local economy, and fostering an environmental mindset. However, structural and institutional challenges limit the sustainable development of the activity. Key barriers include the lack of specific regulations, gaps in enforcement, insufficient infrastructure, and the absence of inclusive policies that restrict access, especially for people with disabilities, and exacerbate social exclusion. Despite these limitations, the activity is valued for its positive impacts, such as job creation, increased local tourism, and raising public awareness of the importance of marine biodiversity. However, the lack of specific regulations and the fragmentation of environmental governance hinder the adoption of responsible practices and the mitigation of adverse impacts, such as stress in cetaceans and activity overloading. To ensure sustainability, it is essential to implement integrated strategies, such as co-management, involving public authorities, the private sector, the third sector, and local communities, ensuring shared responsibilities and social inclusion. Based on the findings of this study, it is recommended to create a robust regulatory framework – characterized by clear regulations to guide the practice of sustainable whale watching tourism – combined with continuous training for operators and visitors, as well as investments in adapted infrastructure and monitoring potential impacts of the activity. When managed properly, whale watching tourism can be a strategic tool for marine conservation and regional development, including community-based tourism. Through sustainable practices and coordinated actions, the activity can balance human demands with the preservation of marine ecosystems and the enhancement of the natural and cultural heritage of coastal regions.
Processo de antropização e erosão costeira da orla de Piúma, ES
(Universidade Federal do Espírito Santo, 2025-06-02) Rocha, Jorlan Gomes; Albino, Jacqueline ; https://orcid.org/0000-0003-2890-9227; http://lattes.cnpq.br/1609264897582182; https://orcid.org/0009-0007-8337-8584; http://lattes.cnpq.br/1298740072837769; Barroso, Gilberto Fonseca ; https://orcid.org/0000-0002-4886-4890; http://lattes.cnpq.br/8505958970169325; Muehe, Dieter Carl Ernst Heino ; https://orcid.org/0000-0002-6061-4034; http://lattes.cnpq.br/6017845242163890
The current research aims to develop a geo-historical analysis of coastal erosion in the municipality of Piúma, on the Southern coast of the State of Espírito Santo, over the decades from 1950 to 2020. Coastal erosion is examined as an intrinsic phenomenon to the dynamics of beaches, but it is increased by the reinforcement of human activity in the region. The methodology was based on the inquiry of photographic and bibliographic collections to trace the evolution of regional occupation and the expansion of buildings over time. A significant transformation of the coastline was observed, with the replacement of dunes and sandbank vegetation by rigid structures, reflecting human interference in the coastal landscape. A analysis of these changes reveals not only the environmental impacts of human actions, but also socioeconomic consequences. Accelerated erosion not only affect the beach ecosystem, but also the local economy, which depends heavily on beach tourism as a source of income. Therefore, this study highlights the interconnection between natural processes and human activities in shaping the coastal landscape and emphasizes the need for an integrated approach in coastal management to mitigate the adverse impacts of coastal erosion
Potencial distribuição do tubarão-limão, Negaprion brevirostris (Poey, 1868), no Brasil
(Universidade Federal do Espírito Santo, 2025-09-04) Moreira, José Victor Calenzani de Oliveira; Santander Neto, Jones; https://orcid.org/0000-0002-8027-3388; http://lattes.cnpq.br/1866656470373882; https://orcid.org/0000-0003-4814-6394; http://lattes.cnpq.br/9732408007101396; Silva, Maurício Hostim; https://orcid.org/0000-0001-5061-9125; http://lattes.cnpq.br/7529427825546114; Pereira, Rodrigo Risi; https://orcid.org/0000-0002-5737-9416; http://lattes.cnpq.br/2498088363709650
The lemon shark (Negaprion brevirostris) is a species found in shallow, coastal waters of the Atlantic Ocean, ranging from the United States to southern Brazil. It is commonly associated with coral reefs, mangroves, bays, and river mouths. In Brazil, its occurrence is most frequently recorded in Fernando de Noronha and the Rocas Atoll. The distribution and abundance of a species provide crucial information for its ecology and behavior. The objective of this study was to investigate the spatial distribution of the lemon shark in Brazilian coastal areas. The distribution map from the International Union for Conservation of Nature (IUCN) suggests that the species is present along the entire coast of Brazil. To verify this premise, we conducted a scientometric analysis of fishing landing monitoring and fisheries, in addition to compiling new records. The results do not support the idea of a widespread coastal distribution, indicating that the species' presence is rarer in locations other than the oceanic islands, where it is more commonly observed. The use of Species Distribution Models (SDMs) has been widely applied in conservation planning and measures, assessing the impacts of climate change, and creating environmental protection areas. For this study, occurrence data were compiled from global databases and scientific literature, along with seven environmental variables from the Bio-ORACLE database. Four SDM algorithms were tested: MaxEnt (AUC > 0.99) and Mahalanobis (AUC ≈ 0.94) performed best, while Bioclim (AUC ≈ 0.88) and Domain (AUC ≈ 0.73) had inferior results. The final model, generated from the overall average of the algorithms, with an AUC value of 0.88, was considered reliable. The predictive modeling indicated high environmental suitability in the regions of Fernando de Noronha and the Rocas Atoll, and low suitability in the Southeastern and Southern regions of Brazil. threatened These results suggest that the species' distribution is underestimated in current maps and that the oceanic islands are priority areas for conservation. It is, therefore, recommended that the distribution maps and the status of the species in Brazil be revised
Análise da variabilidade espacial e temporal da pluma do Rio Doce (ES) através de sensoriamento remoto
(Universidade Federal do Espírito Santo, 2011-06-21) Campos, Alexandre Pelisson Manente; Ghisolfi, Renato David; https://orcid.org/0000-0001-9695-6442; http://lattes.cnpq.br/3746397954560718; Barroso, Gilberto Fonseca; https://orcid.org/0000-0002-4886-4890; http://lattes.cnpq.br/8505958970169325; https://orcid.org/0009-0003-8161-1873; http://lattes.cnpq.br/0711487681646540 ; Rigo, Daniel; https://orcid.org/0000-0003-1516-8853; http://lattes.cnpq.br/3123069911337026 ; Bastos, Alex Cardoso; https://orcid.org/0000-0002-1272-1134; http://lattes.cnpq.br/2951081353357019
A descarga fluvial de água doce pode formar plumas que penetram no oceano costeiro e gerar fluxos de água, sedimento, nutrientes e espécies biológicas que induzem a um número de importantes processos biogeoquímicos costeiros, como aumento ou limitação da produção biológica, ciclos geoquímicos, transporte de poluentes e equilíbrio sedimentar. Assim, torna-se necessário o conhecimento da dinâmica dessas plumas para a gestão integrada entre bacias hidrográficas e ambientes costeiros. A pluma do rio Doce é uma das feições oceanográficas mais proeminentes na plataforma continental do Estado do Espírito Santo, mas sua dinâmica ainda é pouco conhecida. Visando contribuir com informações sobre a variabilidade espaço temporal dessa pluma, o presente estudo utilizou 33 imagens de satélite dos sensores Landsat 5 e 7 e CBERS 2 e 2B para identificar os principais padrões de distribuição superficial da pluma no ambiente marinho os quais foram correlacionados com dados de vazão fluvial (nas 33 imagens) e vento (em 14 imagens). As áreas de pluma variaram entre 0,23 e 29,1 km² com boa correlação com a vazão e foram obtidos cinco padrões de distribuição superficial das plumas: 1) Sem padrão de dispersão comum; 2) Sem padrão de dispersão comum com presença de circulação ciclônica ao sul da desembocadura; 3) Protuberância circular orientada entre SE e S / fluxo anexo para o norte da desembocadura; 4) Dispersão radial a partir da desembocadura e 5) Deslocada para o norte com pequena ou nenhuma dispersão para o sul da desembocadura. De maneira geral, os ventos do quadrante norte auxiliam no espalhamento da pluma para sul e os ventos do quadrante sul limitam esse espalhamento, sendo que alguns indícios indicam que a pluma do rio Doce tenha um espalhamento superficial no ambiente marinho.

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