Spatial distribution of intertidal sandy beach polychaeta along an estuarine and morphodynamic gradient in an eutrophic tropical bay

Omena, Elianne Pessoa; Lavrado, Helena Passeri; Paranhos, Rodolfo; Silva, T.A.

doi:10.1016/j.marpolbul.2012.06.009

Cited by 39 publications

(15 citation statements)

References 57 publications

(66 reference statements)

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“…Whereas macroinvertebrates are indicators of the water quality, the absence of polychaetes in the macroinvertebrate fauna from Kavat Stream may be attributed to the high level of water quality and lack of organic pollutants in this stream. This assertion is in agreement with the observation of many researchers (e.g., Mendez et al 1998;Harlan 2008;Musale and Dattesh 2011;Omena et al 2012) who reported that polychaetes were found in association with sites grossly polluted with organic matter, heavy metals, and petroleum hydrocarbons.…”

Section: Discussionsupporting

confidence: 92%

Food habit of the endangered yellow-spotted newt Neurergus microspilotus (Caudata, Salamandridae) in Kavat Stream, western Iran

Farasat

Sharifi

2014

Zool. Stud.

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Background: Diversity and abundance of macroinvertebrate fauna were simultaneously determined in selected benthic samples and in regurgitated stomach contents in Neurergus microspilotus in Kavat Stream (western Iran) during April and May 2012. The aim of this study was to determine the degree of reliance of this species to benthic macroinvertebrates during their reproductive season in aquatic habitat.

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Section: Discussionsupporting

confidence: 92%

Food habit of the endangered yellow-spotted newt Neurergus microspilotus (Caudata, Salamandridae) in Kavat Stream, western Iran

Farasat

Sharifi

2014

Zool. Stud.

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“…These two abiotic variables (particle size and organic matter) can interfere with the water flow velocity, influencing the structure of benthic communities (Petsch et al 2013). The sediment in degraded marine areas is often characterized by high levels of organic matter and thin grain (Omena et al 2012). The Buenos Aires Creek presented thinner sediment with high content of organic matter compared to the Tronco Creek, features that can be caused by port activity.…”

Section: Spatial Distributionmentioning

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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“…In sandy beaches with low diversity of polychaetes, the occurrence of bioindicator species could be an alert to organic matter enrichment (Rizzo & Amaral 2001, Omena et al 2012. As the abiotic features were not analyzed here, we are cautious to determine the reasons of the dominance of Saccocirridae and Nematoda.…”

Section: Discussionmentioning

confidence: 99%

“…As the abiotic features were not analyzed here, we are cautious to determine the reasons of the dominance of Saccocirridae and Nematoda. Nematodes are also responsive to organic enrichment, being the base of trophic webs, normally replaced by k-strategist species in balanced ecosystems (Omena et al 2012).…”

Section: Discussionmentioning

confidence: 99%

Human Trampling Effect on Benthic Fauna of Sandy Beaches With Different Intensities of Use in Rio De Janeiro, Brazil

Reis

Rizzo

2019

Oecol. Aust.

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About 75% of the world's shoreline is composed of beach environments. Among them, the sandy beach is a familiar environment and used for tourism and recreation. The organisms that live in these environments, as polychaetes, crustaceans and mollusks, are almost unknown by people because they live buried. Thus, many time people could cause damage to these organisms without their own knowledge. Trampling is one of the human-induced impacts to those organisms, destroying their bodies or even dispelling them. Focused on this behavior, this research aims to simulate trampling on two sandy beaches and to observe a real scenario of recreation on weekends and during the week during summer and winter seasons in the Rio de Janeiro state, Brazil. This study verified the changes occurring mainly in the faunal density of these two beaches with different intensities of use, in the predefined situations. Samples were collected during four months, on the second half of year, using simulated treatments and in another two months simple observation of the behavior of tourists was also performed. The simulated treatments did not cause significant changes in any collection except two. One of them was possibly a sampling artifact, which may be due to a low level of impact. The samples on the winter months also did not show significant changes, but the summer samples showed a large decrease in density of organisms during the weekend compared to during the week, probably related to the high intensity of human activity. As this study aimed to verify changes or impacts in organisms at up to 20 cm of depth, we concluded that only high impact activities could affect drastically the faunal density, as observed during the summer season at weekends on the study.

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Spatial distribution of intertidal sandy beach polychaeta along an estuarine and morphodynamic gradient in an eutrophic tropical bay

Cited by 39 publications

References 57 publications

Food habit of the endangered yellow-spotted newt Neurergus microspilotus (Caudata, Salamandridae) in Kavat Stream, western Iran

Food habit of the endangered yellow-spotted newt Neurergus microspilotus (Caudata, Salamandridae) in Kavat Stream, western Iran

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

Human Trampling Effect on Benthic Fauna of Sandy Beaches With Different Intensities of Use in Rio De Janeiro, Brazil

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