Effects of dredged material disposal on benthic macrofauna near Itajaí Harbour (Santa Catarina, South Brazil)

Vivan, Jorge Matheus; Domênico, Maikon Di; Almeida, Tito César Marques de

doi:10.1016/j.ecoleng.2009.06.005

Cited by 20 publications

(19 citation statements)

References 38 publications

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“…Some activities such as drainage (Newell et al 1998, Bemvenuti et al 2005, disposal of sediments (Bolam et al 2006, Vivan et al 2009), construction of permanent structures (Skilleter & Warren 2000), domestic and industrial sewage (Guerra-García & García-Gómez 2004, Cannicci et al 2009), and fishing (Collie et al 2000, Gaspar et al 2003, Gray et al 2006 are well known to affect benthic assemblages. Among the organisms that compose the benthic macrofauna, molluscs may rapidly respond to impacts such as burial and/or suspension of fine sediments (Morton 1996), enrichment with organic matter from sewage (Inglis & Kross 2000, Guerra-García & García-Gómez 2004, Whomersley et al 2007, Cannicci et al 2009), and commercial exploitation (Brazeiro & Defeo 1999).…”

Section: Introductionmentioning

confidence: 99%

Mollusc assemblage in an urban bay nearby a marine extractive reserve, Florianópolis - SC, Brazil

Gandara-Martins

Almeida

2013

Biota Neotrop.

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have described the spatio-temporal variation of mollusc assemblage in a coastal urban bay near a Marine Extractive Reserve (RESEX), where several human activities are performed. Uni and multivariate analyses were conducted considering spatial (six sampling stations) and temporal scale (30 surveys from 2002 to 2008) and two associations were recognized. We identified 48 species from 28 families belonging to four classes: Bivalvia, Gastropoda, Polyplacophora, and Scaphopoda. The Sand Tidal Flat association had a contribution of more than 90% of Anomalocardia brasiliana (Gmelin, 1791) as well as a higher diversity and similarity among surveys. The Mud Bottom association had a lower similarity among surveys due to the low abundance of species. The feeding habits of molluscs were different between the associations. The climate and the fauna followed a seasonal pattern, with low variance over years. The highest diversity was detected at the end of a highway construction, indicating a rapid recolonization, probably due to the proximity to a protected area. We highlight the need to the conservation of sand tidal flats, mostly because of their high diversity, location in a transitional zone between marine, freshwater, and terrestrial ecosystems (connected with mangrove forests), in addition to the economic importance, and anthropogenic pressure. Resumo: Descrevemos a variação espaço-temporal da assembleia de moluscos em uma baía costeira urbana próxima a uma Reserva Extrativista Marinha (RESEX), onde várias atividades humanas são realizadas. Análises uni e multivariadas foram realizadas, considerando as escalas espacial (seis estações de amostragem) e temporal (30 campanhas entre 2002 e 2008). Um total de 48 espécies foram identificadas, pertencentes a 28 famílias e distribuídas em 4 classes: Bivalvia, Gastropoda, Polyplacophora e Scaphopoda. Duas associações foram reconhecidas. A associação Planície Arenosa teve uma contribuição de mais de 90% de Anomalocardia brasiliana (Gmelin 1791) e maior diversidade e similaridade entre as campanhas. A associação Fundo Lamoso teve menor similaridade entre as campanhas, devido à baixa abundância de espécies. O hábito alimentar dos moluscos que compõem as associações também foi diferente entre as associações. O clima durante o período estudado apresentou um padrão sazonal, com pouca variação entre os anos, que foi seguido pela fauna. A maior diversidade foi detectada concomitantemente ao fim da construção de uma rodovia (Via Expressa Sul), evidência de uma rápida recolonização, possivelmente associada à proximidade de uma área protegida (RESEX). Ressaltamos a necessidade de conservação das planícies arenosas entre-marés , principalmente devido a sua alta diversidade, localização em zonas de transição entre os ecossistemas de água doce, marinho e terrestre (conectados a florestas de mangue), importância econômica e pressão antrópica. Palavras-chave: planície arenosa, fundo lamoso, hábitos alimentares, Anomalocardia brasiliana, Sul do Brasil.

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Section: Introductionmentioning

confidence: 99%

Mollusc assemblage in an urban bay nearby a marine extractive reserve, Florianópolis - SC, Brazil

Gandara-Martins

Almeida

2013

Biota Neotrop.

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“…This means that ORIC 1 cannot accurately be considered as a reference site, because its alterations in both physico-chemical parameters and the benthic community indicate some level of environmental degradation, which may be attributed to the proximity of the studied stream to a coffee plantation and cattle farming activities. Vivan et al (2009) reported the effects of sediment disposal on macroinvertebrate associations and community parameters such as abundance, taxa richness and Shannon-Weaver diversity index, which presented significantly reduced values after sediment disposal.…”

Section: Discussionmentioning

confidence: 99%

Assessment of Oriçanga and Itupeva rivers water quality at the Pardo-Mogi watershed (São Paulo State, Brazil)

Silva¹,

Queiroz²,

Cesnik³

et al. 2010

Acta

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Aims: This study aimed to assess the impacts of anthropic activities at four sites of two rivers from the Mogi-Guaçu watershed in São Paulo State, Brazil; Methods: Sites were classified according to their environmental integrity, based on the index developed by Callisto et al. (2002). Physico-chemical and biotic metrics were measured bimonthly. Principal Component Analysis (PCA) analysis was used to assess the relationship between sites and samples. Measures of soil loss evaluated the impacts from land uses at the Mogi-Guaçu watershed; Results: Fifty-two macroinvertebrate families were identified at Oriçanga and Itupeva rivers. The Calamoceratidae (Trichoptera) are shredders, and their percentage was greatest at the most preserved site, where the riparian forest was in good condition. Some unexpected results were found at (ORIC 1), considered a minimally disturbed site according to a Rapid Assessment Protocol. At this site, family richness and Shannon-Weaver diversity index were both low, which could be attributed to riparian forest deforestation, resulting in less aquatic biodiversity. Principal Component Analysis (PCA) showed differences in physico-chemical parameters and macroinvertebrate families, but these differences were not so evident to separate sites according to their environmental integrity degree; Conclusions: We conclude that water quality seemed to be related to land use, as soil losses prevailed in pasture and sugar cane areas, where water quality parameters (biotic and physico-chemical) showed worse results. And that land uses must consider the slope of areas near aquatic ecosystems, due to the potential environmental impacts to these systems, especially erosion and inflow of polluted effluents.

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“…The first dredging to deepen the navigation channel occurred in 1978 and successive events took place in 1983, 1996, and 2006 while maintenance dredging since 2000 has been removing around 2x10 6 m³ per year (INPH, 2012). Although the estuary has been target of several environmental researches throughout the years, only a few aimed to analyze the impacts of dredging operations on the benthic assemblages, such as VIVAN et al (2009). In spite of the above mentioned, the present study evaluated the impacts of a capital dredging that took place in 2011, altering the depth of the navigation channel from -12m to -14m removing around 8x10 6 m³ of sediment.…”

Section: Bjocementioning

confidence: 99%

“…STRICKNEY;PERLMUTTER, 1975;NEWELL et al, 2004;COOPER et al, 2011) and disposal sites (e.g. BOLAN;REES, 2003;VIVAN et al, 2009).…”

Section: Bjocementioning

confidence: 99%

Spatiotemporal distribution of the benthic macrofauna in an urbanized subtropical estuary: environmental variations and anthropogenic impacts

Mattos

Almeida

2016

Braz. j. oceanogr.

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This study was conducted in the Itajaí-Açu river lower estuary in Southern Brazil, in which we aimed to: (1) analyze spatiotemporal variations on the macrofauna; (2) search for relationships between environmental variables and the assembly and (3) evaluate the influence of capital dredging upon the assembly. Two hundred twenty eight samples were performed in four stations, two of which affected by dredging. Sediment (sand, silt and clay, organic matter and carbonate) and water column´s variables (temperature, salinity, pH, dissolved oxygen, and turbidity) were also assessed. We applied Principal Component Analysis for environmental variables and Hierarchical Clustering for biotic data. Correlations between environmental and biotic matrices were tested by Canonical Analysis of Principal Coordinates. Spatiotemporal variations in the assembly were tested by Permutational Multivariate Analysis of Variance. From the 21.839 organisms sampled, 97% was represented by the gastropod Heleobia australis. Despite the influence of the river discharge on the ecosystem, dredging was deleterious to the assembly, favoring opportunistic organisms such as H. australis.

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Effects of dredged material disposal on benthic macrofauna near Itajaí Harbour (Santa Catarina, South Brazil)

Cited by 20 publications

References 38 publications

Mollusc assemblage in an urban bay nearby a marine extractive reserve, Florianópolis - SC, Brazil

Mollusc assemblage in an urban bay nearby a marine extractive reserve, Florianópolis - SC, Brazil

Assessment of Oriçanga and Itupeva rivers water quality at the Pardo-Mogi watershed (São Paulo State, Brazil)

Spatiotemporal distribution of the benthic macrofauna in an urbanized subtropical estuary: environmental variations and anthropogenic impacts

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