Abstract:Resumo: O presente artigo é fruto de pesquisas realizadas no litoral norte do estado do Espírito Santo. O trabalho que ora se apresenta é parte da dissertação de Mestrado da primeira autora, complementado de pesquisas atuais. A proposta desta pesquisa foi analisar as modificações geomorfológicas e fitogeográficas ocorridas nos manguezais da foz do rio São Mateus no período de 1970 a 2008. Realizou-se levantamentos fitossociológicos dos manguezais, levantamento de dados fluviométricos, pluviométricos, sedimento… Show more
“…Bernini et al (2006) reported low heavy metals concentrations (Fe, Mn, Zn and Cu) in the SME mangrove sediment in relation to other Brazilian estuaries, mainly due to the absence of industrial activities surrounding the SME. However, some illegal activities, such as fishing, mangrove deforestation and aquaculture, are still recorded in the estuary (Silva et al , 2005; Vale & Ross, 2011). Fig.…”
Coastal environments are faced with constant habitat modification and biodiversity loss due to human occupation. Estuaries are considered to be highly productive and shelter heterogeneous habitats such as mangrove forests, tidal creeks, tidal mud flats and sandy beaches, which are important for the maintenance of natural resources. The present study aims to evaluate how different shallow juvenile habitats (sandy beaches, mangrove shoreline habitats and dense macrophyte habitats) influence fish during their early life stages in a tropical estuary of Brazil. Monthly samples using a beach seine net from July 2012 to June 2013 were collected in eight shallow areas of the São Mateus River estuary. The fish assemblage comprised mainly juvenile and small-sized fish, which included ecologically and commercially important species. Small recruits of Atherinella brasiliensis and Ctenogobius boleosoma were most abundant in the autumn, while Rhinosardinia bahiensis and Centropomus undecimalis were highly abundant during the winter. The water salinity recorded in the mid and lower estuarine portions was the most important variable for the distribution of A. brasiliensis and Sphoeroides spengleri, whereas Anchovia clupeoides, C. undecimalis, C. parallelus and Gobionellus oceanicus were positively correlated with the water depth of the upper estuarine portion. The fish species T. paulistanus, Genidens genidens and Achirus lineatus were related to the water turbidity in the upper portion. Thus, the heterogeneous shallow water habitats (and their associated environmental parameters) of the São Mateus River estuary are potential nursery grounds for the early life stages of a variety of fish species, which highlights the importance of these areas for local biodiversity management.
“…Bernini et al (2006) reported low heavy metals concentrations (Fe, Mn, Zn and Cu) in the SME mangrove sediment in relation to other Brazilian estuaries, mainly due to the absence of industrial activities surrounding the SME. However, some illegal activities, such as fishing, mangrove deforestation and aquaculture, are still recorded in the estuary (Silva et al , 2005; Vale & Ross, 2011). Fig.…”
Coastal environments are faced with constant habitat modification and biodiversity loss due to human occupation. Estuaries are considered to be highly productive and shelter heterogeneous habitats such as mangrove forests, tidal creeks, tidal mud flats and sandy beaches, which are important for the maintenance of natural resources. The present study aims to evaluate how different shallow juvenile habitats (sandy beaches, mangrove shoreline habitats and dense macrophyte habitats) influence fish during their early life stages in a tropical estuary of Brazil. Monthly samples using a beach seine net from July 2012 to June 2013 were collected in eight shallow areas of the São Mateus River estuary. The fish assemblage comprised mainly juvenile and small-sized fish, which included ecologically and commercially important species. Small recruits of Atherinella brasiliensis and Ctenogobius boleosoma were most abundant in the autumn, while Rhinosardinia bahiensis and Centropomus undecimalis were highly abundant during the winter. The water salinity recorded in the mid and lower estuarine portions was the most important variable for the distribution of A. brasiliensis and Sphoeroides spengleri, whereas Anchovia clupeoides, C. undecimalis, C. parallelus and Gobionellus oceanicus were positively correlated with the water depth of the upper estuarine portion. The fish species T. paulistanus, Genidens genidens and Achirus lineatus were related to the water turbidity in the upper portion. Thus, the heterogeneous shallow water habitats (and their associated environmental parameters) of the São Mateus River estuary are potential nursery grounds for the early life stages of a variety of fish species, which highlights the importance of these areas for local biodiversity management.
“…Ao longo do rio São Mateus 5 , e sobretudo na sua foz, encontravam-se 0,33% de sedimentos, resultantes dos processos flúviomarinhos que ocorriam na época e que são inerentes ao ambiente instável do estuário. Os processos geomórficos que ocorreram no baixo estuário e na foz do rio São Mateus foram estudados por Vale (1999;2010);Ross (2011); Vale et al (2012) e Vale et al, (2020). Tais processos e correlação entre os mesmos e as respostas da vegetação continuam sendo objeto de pesquisa atualmente, onde há dois transectos no manguezal sendo monitorados, utilizando parâmetros como: identificação das espécies vegetais, diâmetro à altura do peito dos indivíduos (dap), altura média dos indivíduos, salinidade de água intersticial e coleta de sedimentos.…”
Trata o presente artigo acerca das métricas resultantes dos dados gerados a partir do levantamento do uso e da cobertura da terra em 1970 e 2012/2014, da Área de Proteção Ambiental de Conceição da Barra, localizada no litoral norte do estado do Espírito Santo. A pesquisa teve como suporte o referencial teórico-metodológico da Ecologia da Paisagem, preconizada pelo biogeógrafo Carl Troll. Do ponto de vista metodológico foi realizada vetorização das fotografias aéreas para o ano de 1970 e da ortofotomosaico para os anos 2012/2014 da área da APA de Conceição da Barra utilizando o software ArcGis™ versão 10.3, cuja licença é do Laboratório de Cartografia e Geotecnologias do Departamento de Geografia da Universidade Federal do Espírito Santo. Posteriormente foram gerados os arquivos raster por meio do uso e cobertura da terra para os dois recortes temporais. A partir das classes de uso e cobertura foram geradas as métricas da paisagem através do software gratuito Fragstats, que estão representadas por meio dos gráficos e dos mapas. Os dados gerados a partir dos mapeamentos foram utilizados para compreender a dinâmica e a atual estrutura da paisagem, bem como para definir a matriz da APA em ambos os recortes temporais. Como resultados, foi definida a matriz de Recursos Ambientais para 1970 e 2012/2014.
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