<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2176-6223</journal-id>
<journal-title><![CDATA[Revista Pan-Amazônica de Saúde]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Pan-Amaz Saude]]></abbrev-journal-title>
<issn>2176-6223</issn>
<publisher>
<publisher-name><![CDATA[Instituto Evandro Chagas. Secretaria de Vigilância em Saúde e Ambiente. Ministério da Saúde]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2176-62232025000110118</article-id>
<article-id pub-id-type="doi">10.5123/s2176-6223202501762</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Cyanobacteria in fluvial-estuarine beaches under intense anthropogenic pressure in the Brazilian Amazon]]></article-title>
<article-title xml:lang="pt"><![CDATA[Cianobactérias em praias flúvio-estuarinas sob intensa pressão antrópica na Amazônia brasileira]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Calandrini]]></surname>
<given-names><![CDATA[Gabriel San Machado]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gomes]]></surname>
<given-names><![CDATA[Aline Lemos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Costa-Tavares]]></surname>
<given-names><![CDATA[Vanessa Bandeira da]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sousa]]></surname>
<given-names><![CDATA[Eliane Brabo de]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade Federal do Pará Núcleo de Ecologia Aquática e Pesca da Amazônia Programa de Pós-Graduação em Ecologia Aquática e Pesca]]></institution>
<addr-line><![CDATA[Belém Pará]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Evandro Chagas Seção de Meio Ambiente Laboratório de Cianobactérias e Bioindicadores Aquáticos]]></institution>
<addr-line><![CDATA[Ananindeua Pará]]></addr-line>
<country>Brasil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<volume>16</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.iec.gov.br/scielo.php?script=sci_arttext&amp;pid=S2176-62232025000110118&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iec.gov.br/scielo.php?script=sci_abstract&amp;pid=S2176-62232025000110118&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iec.gov.br/scielo.php?script=sci_pdf&amp;pid=S2176-62232025000110118&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Contamination of water bodies by anthropogenic activities, including sewage discharge and pollutant inputs, favors the proliferation of cyanobacteria, which can release cyanotoxins that pose risks to public health and bathing suitability.  OBJECTIVE:  To assess the spatiotemporal dynamics of cyanobacteria on beaches in Barcarena, Pará State, Brazil, relating them to physicochemical, nutrient, and climatic variables, while evaluating water quality based on Brazilian legislation.  MATERIALS AND METHODS:  Samples were collected at three equidistant points along Conde, Itupanema, and Caripi beaches in September 2021 and March 2022 for quantitative analyses of cyanobacteria, photosynthetic pigments, and physicochemical factors. Spatial and temporal variability was observed, with precipitation, wind, temperature, electrical conductivity, dissolved oxygen, nitrate, and alkalinity being the most relevant variables.  RESULTS:  A total of 41 cyanobacterial species were identified, with Planktolyngbya limnetica, Aphanocapsa delicatissima, and Aphanizomenon sp. as the most abundant. The driest month showed the highest density (490.0 ± 304.0 cells·mL&#8315;¹) and lowest species richness (23 species). Conde Beach presented the lowest overall density.  CONCLUSION:  Despite these variations, all beaches were classified as suitable for bathing. The findings indicate that hydrological factors and rainfall regimes strongly influence cyanobacterial community structure. In the context of climate change, this study provides a reference for future research and environmental monitoring, emphasizing the presence of potentially toxic species and associated health risks in Amazonian fluvio-estuarine environments.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[RESUMO A contaminação de corpos d'água por atividades antropogênicas, como o despejo de esgoto e de poluentes, favorece a proliferação de organismos, como as cianobactérias, que podem liberar cianotoxinas com riscos à saúde pública e à balneabilidade.  OBJETIVO:  Avaliar a dinâmica espaço-temporal de cianobactérias em praias de Barcarena, estado do Pará, Brasil, relacionando-a a variáveis físico-químicas, nutricionais e climáticas e avaliando a qualidade da água com base na legislação brasileira.  MATERIAIS E MÉTODOS:  As amostras foram coletadas em três pontos equidistantes ao longo das praias de Conde, Itupanema e Caripi, em setembro de 2021 e março de 2022, para análises quantitativas de cianobactérias, pigmentos fotossintéticos e fatores físico-químicos. Observou-se variabilidade espacial e temporal, sendo precipitação, vento, temperatura, condutividade elétrica, oxigênio dissolvido, nitrato e alcalinidade as variáveis mais relevantes.  RESULTADOS:  Foram identificadas 41 espécies de cianobactérias, entre as quais Planktolyngbya limnetica, Aphanocapsa delicatissima e Aphanizomenon sp. foram as mais abundantes. O mês mais seco apresentou a maior densidade (490,0 ± 304,0 células·mL&#8315;¹) e a menor riqueza de espécies (23 espécies). A Praia do Conde apresentou a menor densidade.  CONCLUSÃO:  Apesar das variações observadas, todas as praias foram classificadas como adequadas para banho. Os resultados indicam que fatores hidrológicos e regimes de precipitação modulam a composição e a estrutura da comunidade de cianobactérias. No contexto das mudanças climáticas, este estudo fornece uma referência para futuras pesquisas e ações de monitoramento ambiental, destacando a presença de espécies potencialmente tóxicas e os riscos à saúde em ambientes flúvio-estuarinos da Amazônia.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Amazonian Ecosystem]]></kwd>
<kwd lng="en"><![CDATA[Beach Pollution]]></kwd>
<kwd lng="en"><![CDATA[Cyanobacteria]]></kwd>
<kwd lng="en"><![CDATA[Environmental Biomarkers]]></kwd>
<kwd lng="en"><![CDATA[Environmental Monitoring]]></kwd>
<kwd lng="pt"><![CDATA[Ecossistema Amazônico]]></kwd>
<kwd lng="pt"><![CDATA[Poluição de Praias]]></kwd>
<kwd lng="pt"><![CDATA[Cianobactérias]]></kwd>
<kwd lng="pt"><![CDATA[Biomarcadores Ambientais]]></kwd>
<kwd lng="pt"><![CDATA[Monitoramento Ambiental]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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