A simple and efficient device for sorting large marine benthic samples

Santos, Maria Fernanda L. dos; Pires-Vanin, Ana Maria Setúbal; Muñiz, Pablo

doi:10.1590/s1413-77391996000100006

Cited by 6 publications

(6 citation statements)

References 4 publications

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“…Sediment samples were washed with water through three sieves of 2.0, 1.0 and 0.5 mm mesh screen, respectively, and fixed in 70% alcohol. After that the sediment was washed again in an elutriator (Santos et al, 1996), and the resulting material was sorted under a stereomicroscope. The organisms obtained were counted and identified to species level.…”

Section: Methodsmentioning

confidence: 99%

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Structure and dynamics of the macrobenthic communities of Ubatuba Bay, southeastern Brazilian Coast

Santos

Pires-Vanin

2004

Braz. j. oceanogr.

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Species composition, distribution, density, biomass, diversity and trophic relationships of the macrobenthic communities in Ubatuba Bay, southeastern Brazilian coast, were investigated seasonally from August 1995 to June 1996. Sampling was carried out at 9 stations of between 4 and 13 m depth and taken in duplicate with a 0.1m² van Veen grab. Two hundred and five macrofaunal species were identified, presenting low dominance and frequency. Polychaetes and nematodes dominated, representing 89% of the whole fauna. Spatial variations in the structure of the communities were correlated to sediment type whereas seasonal variations were correlated to the increase in wave size and current disturbance over the substrate during the rainy period. Carnivore and surface deposit-feeder polychaetes were dominant, totalling 81% of the species. Mean grain size, fine sand, very fine sand, silt and clay contents were among the main factors related to the patterns of macrofaunal distribution, density and diversity and to the dominance of trophic groups. Multivariate analysis showed that the area may be divided into two groups of stations each of them characterized, respectively, by the presence of Magelona papillicornis and Mediomastus capensis.
A composição, distribuição, densidade, biomassa, diversidade e relações tróficas das comunidades macrobênticas da Enseada de Ubatuba, costa sudeste brasileira, foram estudadas sazonalmente, de agosto de 1995 a junho de 1996. As amostragens foram realizadas em 9 estações de coleta, situadas entre 4 e 13 m de profundidade, e obtidas em duplicata com pegador de fundo van Veen de 0,1 m² de área amostral. Duzentas e cinco espécies macrobênticas foram obtidas, a maioria apresentando baixa dominância e freqüência. Poliquetas e nemátodes dominaram, representando 89% da fauna total. As variações espaciais na estrutura das comunidades foram correlacionadas ao tipo de sedimento, ao passo que as variações temporais o foram com o aumento da perturbação causada pelas ondas e correntes sobre o substrato durante o período de chuvas. Poliquetas carnívoros e detritívoros foram dominantes, totalizando 81% das espécies. O diâmetro médio das partículas, conteúdo de areia fina, areia muito fina, silte e argila estiveram entre os principais fatores relacionados aos padrões de distribuição da fauna, densidade, diversidade e com a dominância dos grupos tróficos. Análises multivariadas mostraram que a área de estudo pode ser dividida em dois grupos de estações, caracterizados, respectivamente, pela presença de Magelona papillicornis e Mediomastus capensis

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Section: Methodsmentioning

confidence: 99%

“…However, our knowledge of the structure of benthic communities off the Ubatuba shore is still scanty. The existing only works are those of Sumida et al (1993) and Muniz et al (1996) on Fortaleza Bay and the Mar Virado Bay, respectively, and deal with the distribution and diversity of the whole macrobenthic fauna, polychaetes included.…”

Section: Introductionmentioning

confidence: 99%

Structure and dynamics of the macrobenthic communities of Ubatuba Bay, southeastern Brazilian Coast

Santos

Pires-Vanin

2004

Braz. j. oceanogr.

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“…The elutriation technique (Santos et al, 1996) was applied before sorting. To estimate biomass, species were pooled by taxonomic group and weighted (wet weight) with an analytical balance (0.001 g).…”

Section: Data Collectionmentioning

confidence: 99%

Spatial pattern of benthic macrofauna in a sub tropical shelf, Sao Sebastiao Channel, southeastern Brazil

Pires-Vanin

Arasaki

Muñiz

2013

lajar

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ABSTRACT. Diversity and community organization of the benthic macrofauna were investigated along the São Sebastião Channel, northern coast of São Paulo State, Brazil, and related to sedimentary variables and organic load. These important outstanding soft bottom benthic habitats are characterized by their close proximity to sources of human impact. Sampling was undertaken seasonally, using a Van Veen grab (0.1 m 2 ) in 15 oceanographic stations, from November 1993 to August 1994. A total of 392 species were recorded and polychaetes completed nearly 50% of the fauna. Twenty three species were most numerous and frequent and comprised the baseline pool for the area. Sites were classified with respect to sediments in three site-groupings according to Arasaki et al. (2004). The finest-sediment site-group had significantly fewer species than coarser site-groups. The stations locate at the south opening and in the axis of the channel presented sediments with organic matter predominantly of marine origin, indicating the flow of open sea waters across the channel. These places showed also higher values of diversity and species richness. The site-group located along the insular side and in the channel north mouth, stood out for the significantly higher density. Although its relative small area the channel presented species richness similar to that found in the adjacent inner continental shelf. Comparisons between channel and adjacent shelf habitats are addressed in the light of ecological data. Keywords: diversity, macrofauna, continental shelf, São Sebastião Channel, Brazil, South Atlantic Ocean.Aspectos ecológicos de la macrofauna bentónica del Canal de São Sebastião, sudeste de Brasil RESUMEN. Se estudió la organización y diversidad de la comunidad macrobentónica de fondos blandos del canal de São Sebastião, costa norte del Estado de São Paulo, Brazil, relacionándolo con variables sedimentológicas y carga orgánica del sedimento. Estos fondos marinos importantes para especies bentónicas se caracterizan por encontrarse próximos a fuentes de impacto antrópico. El muestreo se desarrolló estacionalmente a lo largo de un año, en 15 estaciones oceanográficas, con una draga Van Veen (0.1 m 2 ), desde noviembre de 1993 hasta agosto de 1994. Se identificó un total de 392 especies, correspondiendo los poliquetos aprox. al 50% de la fauna. De este total, 23 especies fueron las más abundantes y frecuentes. Las estaciones fueron clasificadas según el sedimento en tres grupos de acuerdo con Arasaki et al. (2004). El grupo de estaciones caracterizado por sedimentos finos presentó significativamente menos especies que los otros dos grupos. Las estaciones localizadas en el extremo sur del canal y en su eje longitudinal presentaron sedimentos con materia orgánica predominantemente de origen marino, reflejando el flujo de aguas del océano abierto a través del canal. Estas estaciones mostraron también mayores valores de diversidad y riqueza de especies. Por otro lado, el grupo de estaciones localizado del lado insular y en la boca norte del...

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“…The sediment was washed on board through 0.5 mm mesh sieves and the material retained was preserved in 70% ethanol. In the laboratory, sediments were elutriated (Santos et al 1996) before sorting and identification under stereoscopic microscope.…”

Section: Methodsmentioning

confidence: 99%

Inventory of the marine soft bottom macrofauna of São Sebastião Channel, southeastern Brazilian continental shelf

Pires-Vanin¹,

Muñiz²,

Bromberg³

2014

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A simple and efficient device for sorting large marine benthic samples

Cited by 6 publications

References 4 publications

Structure and dynamics of the macrobenthic communities of Ubatuba Bay, southeastern Brazilian Coast

Structure and dynamics of the macrobenthic communities of Ubatuba Bay, southeastern Brazilian Coast

Spatial pattern of benthic macrofauna in a sub tropical shelf, Sao Sebastiao Channel, southeastern Brazil

Inventory of the marine soft bottom macrofauna of São Sebastião Channel, southeastern Brazilian continental shelf

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