An assessment of mangrove forest in northwestern Mexico using the Google Earth Engine cloud computing platform

PLoS ONE, Journal Year: 2024, Volume and Issue: 19(12), P. e0315181 - e0315181

Published: Dec. 5, 2024

Mangrove forests are commonly mapped using spaceborne remote sensing data due to the challenges of field endeavors in such harsh environments. However, these methods usually require a substantial level manual processing for each image. Hence, conservation practitioners prioritize cloud computing platforms obtain accurate canopy classifications large extensions mangrove forests. The objective this study was analyze spatial distribution and rate change (area gain loss) red ( Rhizophora mangle ) other dominant species, mainly Avicennia germinans Laguncularia racemosa , between 2015 2020 throughout northwestern coast Mexico. Bimonthly Combined Recognition Index (CMRI) from all available Sentinel-2 were processed with Google Earth Engine platform. results indicated an extension 42865 ha 139602 species Gulf California Pacific Mexico 2020. experienced notable decline 1817 2020, largely attributed expansion aquaculture ponds destructive effects hurricanes. Considering two classes, overall classification accuracies 90% 92% maps, respectively. advantages method compared supervised traditional vegetation indices discussed, as disadvantages concerning resolution minimum detection area. work is national effort assist decision-making resource allocations blue carbon, rehabilitation, climate mitigation programs.

Language: Английский

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Comparative Analysis of Cd Uptake and Tolerance in Two Mangrove Species (Avicennia marina and Rhizophora stylosa) with Distinct Apoplast Barriers

Plants, Journal Year: 2023, Volume and Issue: 12(22), P. 3786 - 3786

Published: Nov. 7, 2023

Mangrove plants demonstrate an impressive ability to tolerate environmental pollutants, but excessive levels of cadmium (Cd) can impede their growth. Few studies have focused on the effects apoplast barriers heavy metal tolerance in mangrove plants. To investigate uptake and Cd plants, two distinct species, Avicennia marina Rhizophora stylosa, are characterized by unique barriers. The results showed that both exhibited highest concentration Cd2+ roots, followed stems leaves. concentrations all organs R. stylosa consistently lower than those A. marina. In addition, displayed a reduced apparent PTS smaller percentage bypass flow when compared root anatomical characteristics indicated treatment significantly enhanced endodermal suberization higher degree suberization. transcriptomic analysis roots under stress revealed 23 candidate genes involved suberin biosynthesis 8 associated with regulation. This study has confirmed suberized apoplastic play crucial role preventing from entering roots.

Language: Английский

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

Sociedade & natureza, Journal Year: 2023, Volume and Issue: 35(1)

Published: April 25, 2023

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

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The Spatial and Temporal Distribution of Mangrove Forest Cover from 1973 to 2020 in Chwaka Bay and Menai Bay, Zanzibar

Applied Sciences, Journal Year: 2023, Volume and Issue: 13(13), P. 7962 - 7962

Published: July 7, 2023

Mangroves in Zanzibar have a high value for biodiversity and scenic beauty. However, mangroves are susceptible to anthropogenic natural environmental disturbances. Although global mangrove monitoring systems exist, it is the practitioners focused on small areas who knowledgeable about area which they work. This study examined change cover Chwaka Bay Menai Bay, between 1973 2020, using Landsat satellite data. The transformed divergence (TD) index Jeffries–Matusita (J-M) distance were used calculate separability of land classes before classification. overall accuracies ranged 82.5 92.7% 85.5 94.5% Bay. kappa coefficients (ĸ) range 0.72–0.90, while producer’s user’s 72 100%. Bay’s annual decrease 2020 was 48.5 ha, compared Menai’s 6.8 ha. loss linked illegal timber/pole cutting, firewood collection, charcoal burning, unsustainable aquaculture, agricultural urban development. Others changes conditions that suitable climate change. crucial providing basis ecological restoration management Zanzibar’s ecosystem.

Language: Английский

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Mapeo de manglares utilizando cómputo en la nube y un índice espectral específico para apoyar acciones de manejo: un caso del Caribe Colombiano semiárido

Ecosistemas, Journal Year: 2023, Volume and Issue: 32(3), P. 2599 - 2599

Published: Dec. 21, 2023

El mapeo de manglares es la base para zonificación con fines manejo sostenible a escala sub-nacional. Sin embargo, muchas autoridades ambientales no cuentan cartografía actualizada y usualmente el presupuesto disponible validación campo limitado. objetivo este artículo fue estimar desempeño del Índice Vegetación Manglar (IVM) actualización extensión manglar en un área semi-árida Caribe Sur. Se empleó departamento Sucre (Colombia) como ejemplo reconstrucción multi-temporal (2017-2021) basada IVM, imágenes Sentinel 2 cómputo Google Earth Engine. La asistida sobrevuelos vehículo aéreo tripulado bajo costo (DJI Phantom 3 Advanced) observar áreas difícil acceso interior parches grandes. varió significativamente entre temporadas lluvia sequía, producto cambio verdor. Mediante construcción mosaico se estimaron 8924 ha (coeficiente Kappa: 0.78), cubriendo todas las categorías manejo. Comparaciones estimaciones previas realizadas por esfuerzos globales nacionales mostraron alto grado consistencia. concluyó que método, pese su simplicidad, una alternativa rápida actualizar zonificaciones regiones semiáridas Colombia. discuten ventajas desventajas método.

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