Os Nematoda da plataforma continental ao largo do sistema estuarino de Santos

Yaginuma, Luciana Erika

doi:10.11606/d.21.2011.tde-27072011-153347

Cited by 1 publication

(1 citation statement)

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“…The ranges of meiofauna densities and richness observed in the Santos Basin are comparable to those previously found in the shelf off Ubatuba (SP) and Cabo Frio (RJ) (Argeiro, 2009;Yaginuma, 2010) and in the Campos (Petrobras, 2013;Fonsêca-Genevois et al, 2017) and Espirito Santo Basins (Santos et al, 2016(Santos et al, , 2020Venekey et al, 2016). Meiofauna densities in these three Basins exceeded that in the shelf off Sergipe, south of Alagoas (Pinto et al, 2018).…”

Section: Discussion Meiofauna Distribution and Environmental Driverssupporting

confidence: 85%

Predicting large-scale spatial patterns of marine meiofauna: implications for environmental monitoring

Gallucci,

Fonseca,

Vieira

et al. 2023

Ocean Coast. Res.

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This study aims model the distribution of meiofauna indicators in relation to environmental variables from the Santos Basin continental margin, SE Brazil, using machine learning techniques, to provide baseline information and foster future monitoring programs. A total of 100 sampling stations were distributed in eight transects and 11 isobaths (25 to 2,400 m) perpendicular to the coast. In each station, three replicates were sampled for meiofauna and 38 environmental parameters. A total of 28 meiofauna taxa were found, with a mean richness varying from 3 to 15 taxa per station. Meiofauna mean density varied between 55 and 2,001 ind. 10 cm -2 . Density of meiofauna and its most frequent taxa (Nematoda, Copepoda, Kinorhyncha, and Polychaeta), and taxa richness were used as descriptors for the models. Meiofauna and nematode density showed the highest training and testing accuracies, with R² values above 0.74. Based on the distribution of meiofauna descriptors and their responses to environmental conditions, we suggest a mosaic of six benthic zones. The La Plata Plume zone and the Cabo Frio Upwelling zone are two of the most diverse and productive zones in the continental shelf, wich are separated by the less productive Central Continental Shelf zone. A fourth zone, with very low meiofauna densities, corresponds to the carbonated sediments of the shelf-break. The Upper and Mid-Slope is a narrow zone along the entire basin, with intermediate densities and small amounts of high-quality organic carbon. The largest, impoverished zone, the Lower Slope and Plateau comprises the deepest areas and the São Paulo Plateau. The study showed that, although some zones can be recognized by most meiofauna descriptors, others are better characterized by specific ones, implying that meiofauna indicators should be monitored concomitantly. We recommend the optimization of sampling design based on our model to reduce costs and increase our understanding of the system.

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