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

Soares-Gomes, Abı́lio; Pires-Vanin, Ana Maria Setúbal

doi:10.1590/s0101-81752003000400027

Cited by 24 publications

(12 citation statements)

References 25 publications

(17 reference statements)

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“…This result was expected as in the summer-fall period the frequency of typical storm disturbance conditions of the southeastern Brazilian coast is lower than that in the winter-spring period and it can be related to high species richness or diversity in the Brazilian continental shelf observed in the summer period (Soares-Gomes & Pires-Vanin, 2003).…”

Section: Discussionmentioning

confidence: 75%

Subtidal benthic marine algae of the Marine State Park of Laje de Santos (São Paulo, Brazil)

Filho¹,

Horta

Brasileiro³

et al. 2006

Braz. j. oceanogr.

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A B S T R A C TLaje de Santos Marine State Park has been pointed out as a site of high marine diversity. In spite of its importance to conservation of marine biota no results of investigations about its marine biodiversity have been published. The aim of this work was to characterize the subtidal seaweed flora of this Marine Park. Samplings were performed by scuba diving: a qualitative one that included the subtidal zone down to 26 m depth and other quantitative at two pre-determined depths, 10 and 20 m. Among the 129 taxa identified, 5 species were identified for the first time for the São Paulo State, 3 for the Brazilian coast and 1 for the South Atlantic Ocean. The most abundant algae were Sargassum vulgare and turf composed by geniculate coralline and filamentous groups. The frequency of occurrence of taxa revealed that most of species are restricted to frequencies less than 20 % in all samples. The analyses of the subtidal marine benthic algal flora indicate the Marine State Park of Laje de Santos as a site of elevated species richness and that its floristic composition is related to a benthic community structure dominated by turf-forming groups and population of S. vulgare. R E S U M OO Parque Estadual Marinho da Laje de Santos tem sido apontado como local de elevada diversidade marinha. Apesar de sua importância para a conservação da biota marinha não existem resultados efetivamente publicados. O objetivo deste trabalho é o de caracterizar a flora marinha bentônica desse Parque Marinho. Amostragens foram realizadas por mergulho autônomo: uma qualitativa que incluiu a zona do sublitoral até a profundidade de 26 m e outra quantitativa em duas profundidades pré-determinadas, 10 e 20 m.. Dentre os 129 táxons encontrados, foram identificadas pela primeira vez, 5 espécies para o Estado de São Paulo, 3 espécies para o litoral brasileiro e 1 espécie para o Atlântico sul. As algas mais abundantes foram Sargasum vulgare e tufos compostos de coralináceas geniculadas e algas filamentosas. A freqüência de ocorrência dos táxons revelou que a maioria deles ocorreu em menos de 20 % das amostras. A análise da flora marinha bentônica demonstra que o Parque Estadual Marinho da Laje de Santos é um local de elevada riqueza e que sua composição florística esta relacionada a uma estrutura de comunidade bentônica dominada por populações de S. vulgare e grupos formadores de tufos.

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Section: Discussionmentioning

confidence: 75%

Subtidal benthic marine algae of the Marine State Park of Laje de Santos (São Paulo, Brazil)

Filho¹,

Horta

Brasileiro³

et al. 2006

Braz. j. oceanogr.

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“…Hydrodynamic patterns regulated by seasonal phenomena such as rainfall can cause major changes in the distribution of organisms, both spatially and temporally (Soares- Gomes and Pires-Vanin 2003;Odum and Barret 2007). In intertidal communities, the zonation of organisms can follow a physiological stress gradient due to environmental conditions such as varying tides, sediment properties, submergence, and duration of exposure (Peterson 1991;Dittmann 2000;Tanaka and Maia 2006;Maia and Tanaka 2007).…”

Section: Introductionmentioning

confidence: 99%

Patterns of mollusc distribution in mangroves from the São Marcos Bay, coast of Maranhão State, Brazil

et al. 2016

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The diversity and distribution of molluscs from the Amazon Coast of Maranhão State, Brazil, are poorly understood. The aim of this study was to investigate how molluscs in two mangrove creeks (Buenos Aires and Tronco) at the São Marcos Bay, coast of the Maranhão State, respond to spatial and temporal variations in the environment. Sampling was performed in the intertidal area along three zones established using a straight line transect of 100 m. Abiotic variables of water and sediment were measured at each creek. We found 5,912 specimens belonging to 23 species and 15 families of epifaunal and infaunal molluscs. The patterns of their distribution in the two creeks were different. Salinity, dissolved oxygen, and rainfall were the main variables that affected the temporal distribution of molluscs. We found low species richness in the overall mollusc composition. Diversity in the Buenos Aires Creek was lower than that observed in the Tronco Creek, possibly because of activities of a port located in proximity to the former. The spatial distribution of molluscs along the zones followed an abundance and diversity gradient, mainly influenced by exposure time during low tide. Port activities may influence the patterns of mollusc distribution in the surrounding mangroves, and we thus highlight the importance of management and monitoring of these areas.KEYWORDS: benthic fauna, diversity, Littoraria, Melampus, salt creek. Padrões de distribuição de moluscos em manguezais da Baía de São Marcos, costa do Estado do Maranhão, Brasil RESUMOA diversidade e distribuição de moluscos na Costa Amazônica do Estado do Maranhão, Brasil, são pobremente conhecidas. O objetivo deste estudo foi investigar como os moluscos em dois igarapés de manguezal (Buenos Aires e Tronco) na Baía de São Marcos, costa do Estado do Maranhão, respondem a variações espaciais e temporais no ambiente. A amostragem foi conduzida no entre-marés ao longo de três zonas estabelecidas a partir de um transecto em linha reta de 100 m. As variáveis abióticas de água e sedimento foram medidas para cada igarapé. Foram contabilizados 5.912 espécimes pertencentes a 23 espécies e 15 famílias na epifauna e endofauna. Os padrões de distribuição de moluscos foram distintos entre os dois igarapés. Salinidade, oxigênio dissolvido e precipitação foram as principais variáveis que influenciaram a distribuição temporal dos moluscos. Observou-se baixa riqueza de espécies na composição geral de moluscos. A diversidade no igarapé Buenos Aires foi menor do que a observada no igarapé Tronco, possivelmente por causa das atividades portuárias nas proximidades do primeiro. A distribuição espacial vertical de moluscos ao longo das zonas seguiu um gradiente de abundância e diversidade influenciado principalmente pelo tempo de exposição durante a maré baixa. As atividades portuárias podem estar influenciando os padrões de distribuição de moluscos nos manguezais do entorno, portanto destacamos a importância do manejo e monitoramento dessas áreas.

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“…Beginning at 15 and 20 m, the influence of the open sea is stronger, with no physical obstacle and little influence from the coast and land. This leads to more homogeneous sediment, with a predominance of coarse sediments and lower organicmatter content (Soares-Gomes and Pires-Vanin 2003).…”

Section: Discussionmentioning

confidence: 99%

Ecological distribution of the hermit crab Dardanus insignis in shallow waters of the tropical-subtropical transition zone on the Brazilian coast

et al. 2015

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Dardanus insignis is the most abundant hermit crab on sublittoral of soft bottoms along the southeastern coast of Brazil. It is among the Decapoda species that structure the macrobenthic community, from shallow regions to deeper areas up to 100 m. This study evaluated the distribution of D. insignis in a tropical-subtropical transition zone. In three bays (Ubatumirim, Ubatuba and Mar Virado), sampling was conducted monthly for two years, on four transects parallel to the coastline (at depths of 5, 10, 15, and 20 m), as well as one transect sheltered from wave action, and another in a more exposed area. Environmental variables were monitored in each sampling. The size fractions of coarse, medium and fine sand showed a positive correlation with the distribution of demographic groups on transects 15 and 20 m deep. On the other hand, the mean grain size (Phi) and silt+clay are negatively correlated with the distribution of the species. Adult males and females showed no environmental-specific relationship similar to the juveniles, and ovigerous females were negatively correlated by the bottom temperature. These results reveal that D. insignis is found in greater abundance on transects farther from the coastline, places that are less affected by the continual environmental oscillations in coastal regions and which, therefore, offer greater protection and stability for hermit crabs.

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

Cited by 24 publications

References 25 publications

Subtidal benthic marine algae of the Marine State Park of Laje de Santos (São Paulo, Brazil)

Subtidal benthic marine algae of the Marine State Park of Laje de Santos (São Paulo, Brazil)

Patterns of mollusc distribution in mangroves from the São Marcos Bay, coast of Maranhão State, Brazil

Ecological distribution of the hermit crab Dardanus insignis in shallow waters of the tropical-subtropical transition zone on the Brazilian coast

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