Brazilian mangroves at risk

Ottoni, Felipe Polivanov; Hughes, Robert M.; Katz, Axel M.; Rangel-Pereira, Filipe da Silva; Bragança, Pedro H. N.; Fernandes, Rozijane Santos; Palmeira-Nunes, Ana Rita Onodera; Nunes, Jorge Luíz Silva; Santos, Ricardo Rodrigues dos; Piorski, Nivaldo Magalhães; Filho, Jorge Luiz Rodrigues

doi:10.1590/1676-0611-bn-2020-1172

Cited by 13 publications

(8 citation statements)

References 44 publications

(45 reference statements)

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“…Most impacts are due to an increase of activities related to agriculture, industry, tourism, and shrimp farming ( Schaeffer-Novelli et al, 2000 ; Guimarães et al, 2010 ). Moreover, recent Brazilian political decisions, such as changes in the Mangrove National Action Plan (PAN Manguezal) with the removal of the important objective of eradicating shrimp farming and saline developments in mangrove systems, left Brazilian mangrove ecosystems even more unprotected and vulnerable ( Ottoni et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

Mapping seahorses in a Brazilian estuary: mangrove structures as key predictors for distribution and habitat preference

Borges

Alves

Oliveira

2023

PeerJ

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Planning for effective conservation demands an accurate understanding of the ecological aspects of species, particularly their distribution and habitat preferences. This is even more critical in the case of data-poor, rare, and threatened species, such as seahorses, mainly when they inhabit vulnerable ecosystems like estuaries. Given the importance of better understanding these parameters to design seahorse conservation strategies, we mapped the distribution and assessed habitat preferences of longsnout seahorses (Hippocampus reidi) in a mangrove estuary in a Brazilian protected area. Using generalised linear mixed-effects models we found that dense mangrove cover macro-habitats and shallow depths predicted seahorse sightings and higher densities. Furthermore, the selective index of micro-habitats used by seahorses showed that seahorses exhibited a preference for mangrove structures as holdfasts (i.e., fallen branches). Due to the significant importance of mangroves in providing suitable habitats for H. reidi in estuaries, it is crucial to enforce the protection of these ecosystems in conservation and management strategies for the species.

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Section: Discussionmentioning

confidence: 99%

Mapping seahorses in a Brazilian estuary: mangrove structures as key predictors for distribution and habitat preference

Borges

Alves

Oliveira

2023

PeerJ

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“…No Brasil, o manguezal enfrenta uma série de ameaças para sua conservação (FERNANDES et al, 2018;LACERDA, 2016;MAGRIS;BARRETO, 2010;OTTONI et al, 2021;PAULA et al, 2019). No litoral do Paraná, os fatores geradores de significativos efeitos negativos sobre os manguezais englobam o desmatamento para fins de expansão urbana, de atividades industrial, portuária, entre outros; a exploração de madeira; especulação imobiliária; potenciais riscos da aquicultura; contaminação por petróleo e seus derivados, fertilizantes, defensivos agrícolas ou metais pesados; dragagens; aterros para construção de vias de acesso; entre outros (LANA, 2004).…”

Section: Introductionunclassified

Análise da Pressão Antrópica sobre Manguezais Urbanos: Subsídios à Proteção Ambiental e ao Ordenamento Territorial

Vikou

Paz

Pilatti

et al. 2023

S&N

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O manguezal é um ecossistema de transição entre os ambientes terrestre e marinho e representa um importante indicador ecológico pelos serviços ecossistêmicos fornecidos. No entanto, apesar da relevância ecológica, ainda sofre pressões antrópicas e vem perdendo em extensão e qualidade ambiental. No Brasil e, especificamente, no município de Paranaguá, uma mescla de uso antrópico tem causado pressões significativas sobre os manguezais. Neste sentido, o objetivo deste estudo é avaliar o grau de antropização dos manguezais urbanos do município de Paranaguá (PR), através da utilização de imagens de altíssima resolução espacial, obtidas através de Aeronave Remotamente Pilotada a fim de subsidiar políticas municipais de ordenamento territorial. Do ponto de vista metodológico, a partir de campanhas de campo, foram produzidos mapas com auxílio do software QGIS 3.10, a partir da fotointerpretação de ortomosaicos . A legenda das classes de antropização abrangeu: deposição de lixo domiciliar (i), entulhos (ii), lançamento de efluentes domésticos sem tratamento (iii) e manilhas (iv). Os resultados apontaram um total de 475 pontos de pressão antrópica sobre as 22 manchas de manguezal analisadas. A classe de maior destaque foi a de lixo domiciliar, seguida respectivamente de lançamento de efluentes domésticos sem tratamento, entulhos (material de construção) e, por fim, manilha. Como conclusão, o uso de ortomosaicos de alta resolução mostrou ser uma ferramenta importante e eficaz na análise da antropização dos manguezais urbanos, destacando assim , as áreas com maior pressão e, contribuindo para um monitoramento contínuo. Os produtos desta pesquisa podem auxiliar na elaboração de de instrumentos de ordenamento territorial do município, destacando a necessidade da construção de um olhar holístico em prol da conservação dos manguezais.

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“…In Brazil, mangroves face several threats to their conservation (FERNANDES et al, 2018;LACERDA, 2016;MAGRIS;BARRETO, 2010;OTTONI et al, 2021;PAULA et al, 2019). On the coast of Paraná, the factors generating significant negative effects on mangroves encompass deforestation for purposes of urban expansion, industrial activities, port activities, among others; timber exploitation; real estate speculation; potential risks from aquaculture; contamination by oil and its derivatives, fertilizers, pesticides or heavy metals; dredging and landfills for construction of access roads; among others (LANA, 2004).…”

Section: Introductionmentioning

confidence: 99%

Analysis of Anthropic Pressure on Urban Mangroves: Subsidies for Environmental Protection and Territorial Planning

Vikou¹,

Paz²,

Pilatti³

et al. 2023

Sociedade &Amp; Natureza

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The mangrove is a transitional ecosystem between terrestrial and marine environments and represents an important ecological indicator for the ecosystem services provided. However, despite its ecological relevance, it still suffers anthropic pressures and has been losing in extent and environmental quality. In Brazil, and specifically in the municipality of Paranaguá, a mix of anthropogenic use has caused significant pressures on mangroves. In this sense, the aim of this study is to assess the degree of anthropization of the urban mangroves in the city of Paranaguá (PR), through the use of very high spatial resolution images, obtained from Remotely Piloted Aircraft in order to support municipal policies for land-use planning. From the methodological point of view, from field campaigns, maps were produced with the aid of QGIS 3.10 software, from the photointerpretation of orthomosaics. The legend of the anthropization classes covered: deposition of household waste (i), rubble (ii), discharge of untreated domestic effluents (iii) and manholes (iv). The results indicated a total of 475 points of anthropic pressure on the 22 mangrove patches analysed. The most prominent class was household waste, followed respectively by untreated domestic effluent discharge, debris (construction material) and, finally, shackle. In conclusion, the use of high-resolution orthomosaics proved to be an important and effective tool in the analysis of anthropization of urban mangroves, thus highlighting the areas with greater pressure and contributing to a continuous monitoring. The products of this research can help in the elaboration of land-use planning instruments for the municipality, highlighting the need for the construction of a holistic view in favor of mangrove conservation.

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Brazilian mangroves at risk

Cited by 13 publications

References 44 publications

Mapping seahorses in a Brazilian estuary: mangrove structures as key predictors for distribution and habitat preference

Mapping seahorses in a Brazilian estuary: mangrove structures as key predictors for distribution and habitat preference

Análise da Pressão Antrópica sobre Manguezais Urbanos: Subsídios à Proteção Ambiental e ao Ordenamento Territorial

Analysis of Anthropic Pressure on Urban Mangroves: Subsidies for Environmental Protection and Territorial Planning

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