Anelídeos poliquetas da plataforma continental norte do Estado de São Paulo: I - padrões de densidade e diversidade específica

Paiva, Paulo Cesar

doi:10.1590/s0373-55241993000100006

Cited by 16 publications

(14 citation statements)

References 13 publications

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“…The peak abundances found in soft-bottoms with higher values of fine grains and TOM, demonstrated that the general distribution pattern of total polychaetes is not the same for all abundant polychaete species. L. treadwelli has been recorded in both intertidal (RIZZO;AMARAL, 2001) and inner shelf (20 to 50 m depth) environments in SE Brazil (PAIVA, 1993a), but unlike the present study, the literature does not indicate any grain size preference of the species. This study is the first record of L. treadwelli on the Abrolhos Bank, although other species of the genus Scoloplos (previous genus of L. treadwelli) are commonly found in the area .…”

Section: Discussioncontrasting

confidence: 97%

Looking at the soft-bottom around a coastal coral reef: the impact of terrigenous input on Polychaeta (Annelida) community

Quesada-Silva

Pires-Vanin

2017

Braz. j. oceanogr.

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Erosion on coral reefs produces fragments of the constructor organisms that are scattered all around, thus enlarging the reef boundaries. Statistical modelling approach was used to investigate whether the Polychaeta community around Sebastião Gomes reef (Abrolhos Bank, Brazil) is influenced equally by sediment characteristics and/or by position related to the reef, that are variables related to the terrigenous input influence. In July 2007, a period dominated by winds that resuspend fine sediment from the land to coastal reefs, sediment samples were taken on four transects perpendicular to the reef (S, W, N and E) and a total of 121 species of polychaetes were recorded. The most abundant species was the carnivorous Goniadides carolinae and the model selected for it approximates to the best models fitted for both total macrofauna and polychaete abundance. These models represented higher abundance in coarse carbonate sediments on windward reef faces, where there is almost no terrigenous sediment. On the other hand, the Polychaeta richness did not depend on the transects. Sebastião Gomes reef is one of the many coastal reefs from Abrolhos Bank, whose healthy is probably in danger because of the increase of mud related to human activities, as deforestation and, recently, mining waste. AbstrAct

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Section: Discussioncontrasting

confidence: 97%

Looking at the soft-bottom around a coastal coral reef: the impact of terrigenous input on Polychaeta (Annelida) community

Quesada-Silva

Pires-Vanin

2017

Braz. j. oceanogr.

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“…O presente estudo mostrou que a fauna de bivalves pode ser empregada com segurança na representação da estrutura de comunidades do bentos em geral, tal como acontece com Polychaeta, outro grupo da macrofauna freqüentemente utilizado para tal (ALONGI & CHRISTOFFERSEN 1992, PAIVA 1993. Os bivalves apresentaram uma maior diversidade na plataforma interna, até cerca de 50m de profundidade, enquanto que as maiores densidades ocorreram a partir da isóbata de 50 m. À semelhança do obtido por PIRES-VANIN (1993) para a macrofauna total da plataforma continental ao largo de Ubatuba e São Sebastião, respectivamente, os maiores valores de diversidade não se relacionaram necessariamente a um tipo de sedimento.…”

Section: Discussionunclassified

Padrões de abundância, riqueza e diversidade de moluscos bivalves na plataforma continental ao largo de Ubatuba, São Paulo, Brasil: uma comparação metodológica

Soares-Gomes

Pires-Vanin

2003

Rev. Bras. Zool.

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“…Many studies of the benthic fauna of the ubatuba shelf on Brazil's southeastern coast have aimed to shed light on the functioning of this ecosystem (Paiva, 1993a(Paiva, , 1993bPires-vanin, 1993;Pires-vanin et al, 1995;santos & Pires-vanin, 1999). however, none of these studies has been dedicated to a detailed investigation of the species' composition or the structure of assemblages.…”

Section: Introductionmentioning

confidence: 99%

Bivalve mollusk assemblages on São Paulo's northern continental shelf, southeast Brazil

Soares-Gomes

Pires-Vanin

2005

Braz. J. Biol.

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AbstrActsoft bottom bivalve mollusc assemblages were sampled along a depth gradient (10 to 100 m) on the northern são Paulo shelf during the austral summer and winter. a one-way analysis of similarity permutation test revealed there was no seasonal difference in the structure of the bivalve assemblages in the area. a clustering analysis indicated 3 groups of stations corresponding to the bathymetric gradient. Both k-dominance curves and shannon and Pielou indexes showed higher biological diversity and higher evenness for the shallower area. Most of the bivalves found were classified as suspension-feeders, co-occurring with deposit-feeder species, suggesting an absence of negative interactions between these trophic groups. Differences in the frequency of disturbance along the depth gradient caused by wave storms -more common in winter -and also by predation and anthropogenic activities, such as dredging of fishing boats and input of gross sewage, likely explain the higher diversity found on the inner shelf of ubatuba.Keywords: soft bottom, sublittoral, biodiversity, spatial distribution, macrobenthos. Moluscos bivalves de fundos não-consolidados foram amostrados no verão e no inverno entre as profundidades de 10 a 100 m na plataforma norte de são Paulo. Baseado na análise de variância por similaridade não foi verificada diferença sazonal significativa nas associações de bivalves. a análise de agrupamento evidenciou três grupos de estações que correspondem ao gradiente batimétrico. tanto as curvas de dominância-k, quanto os índices biológicos usados (shannon e Pielou) mostraram uma maior diversidade biológica e uma maior uniformidade na distribuição dos indivíduos nas áreas rasas. a maioria dos bivalves coletados pode ser classificada como de hábito alimentar suspensívoro. estes, porém, coocorreram com espécies depositívoras, o que sugere uma ausência de correlação negativa entre esses dois grupos tróficos. Diferenças na freqüência de ocorrência de distúrbios ao longo do gradiente batimétrico, causados por ondas de tempestade, mais comuns no inverno, e também causados por predação e atividades antrópicas, tais como dragagens realizadas por barcos de pesca e despejo de esgoto in natura, podem explicar os padrões de diversidade observados.Palavras-chave: biodiversidade, sedimentos marinhos, distribuição espacial, plataforma continental. 718 soares-GoMes, a and Pires-vanin, a. M. s.

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Anelídeos poliquetas da plataforma continental norte do Estado de São Paulo: I - padrões de densidade e diversidade específica

Cited by 16 publications

References 13 publications

Looking at the soft-bottom around a coastal coral reef: the impact of terrigenous input on Polychaeta (Annelida) community

Looking at the soft-bottom around a coastal coral reef: the impact of terrigenous input on Polychaeta (Annelida) community

Padrões de abundância, riqueza e diversidade de moluscos bivalves na plataforma continental ao largo de Ubatuba, São Paulo, Brasil: uma comparação metodológica

Bivalve mollusk assemblages on São Paulo's northern continental shelf, southeast Brazil

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