Benthic Estuarine Assemblages from the Southern Brazilian Marine Ecoregion

Netto, Sérgio A.; Pagliosa, Paulo Roberto; Colling, André; Fonseca, Alessandra; Brauko, Kalina M.

doi:10.1007/978-3-319-77779-5_6

Cited by 17 publications

(6 citation statements)

References 81 publications

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“…We did not find any effect of sediment or salinity on β‐diversity in the outer sector, where the estuary experiences large oscillations in salinity due to tide and wind effects on marine and freshwater inputs (Netto et al. ). It is possible that the large and unpredictable variation in salinity in this sector leads to physiological stressful conditions, which may mask the spatial effects of environmental drivers (Sanders ).…”

Section: Discussionmentioning

confidence: 58%

“…Despite the importance of species loss associated with sediment variation within the estuarine sectors, it should be noted that the nestedness pattern was detected in only two of three sectors of the study area. We did not find any effect of sediment or salinity on b-diversity in the outer sector, where the estuary experiences large oscillations in salinity due to tide and wind effects on marine and freshwater inputs (Netto et al 2018). It is possible that the large and unpredictable variation in salinity in this sector leads to physiological stressful conditions, which may mask the spatial effects of environmental drivers (Sanders 1968).…”

Section: Discussionmentioning

confidence: 64%

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The scale‐dependent effect of environmental filters on species turnover and nestedness in an estuarine benthic community

Menegotto

Dambros

Netto

2019

Ecology

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Environmental filtering is a major mechanism structuring ecological communities. However, it is still not clear how different abiotic drivers composing the environmental filter interact with each other to determine local species assemblage and create spatial patterns in species distribution. Here, we evaluated the effects of two strong and uncorrelated environmental variables (salinity and sediment properties) on the β‐diversity of an estuarine macrobenthic community while accounting for spatial effects. Our results show that the benthic community composition has a strong spatial structure along the estuary, which can be greatly explained by salinity and sediment variation. Salinity is most associated with species replacement (turnover), whereas sediment is more important for species loss (nestedness). However, the effects of sediment variation on nestedness are mainly detected at a smaller spatial scale (estuarine sectors), whereas the effects of salinity on species turnover are stronger as spatial scale increases (entire estuary). Our findings suggest that environmental filters can drive both turnover and nestedness components of β‐diversity, but that their relative importance depends on the spatial scale of investigation. Although abiotic drivers associated with detrimental effects (sediment) usually result in nestedness, larger spatial scales encompass abiotic drivers associated with different suitable conditions (salinity), increasing the relative importance of the replacement component of species β‐diversity.

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Section: Discussionmentioning

confidence: 58%

Section: Discussionmentioning

confidence: 64%

The scale‐dependent effect of environmental filters on species turnover and nestedness in an estuarine benthic community

Menegotto

Dambros

Netto

2019

Ecology

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“…The richness of the macrobenthos in the most urbanized areas around Santa Catarina Island have long been poor, with a more recent deterioration in the outer reaches of the bay between 2001 and 2020. Evidence of macrofaunal negative responses to higher contents of trace metals (copper and lead), suspended particulate matter, nitrogen and phosphorus have been previously found in urbanized estuaries that drain to the bay (Pagliosa et al, 2006;Netto et al, 2018). Richness, abundance, and productivity decrease in virtue of bottom hypoxia, hampering larval settlement, and community recovery (Kodama and Horiguchi, 2011;Sturdivant et al, 2014).…”

Section: Dead Zones and Loss Of Biodiversitymentioning

confidence: 94%

Marine Heatwaves, Sewage and Eutrophication Combine to Trigger Deoxygenation and Biodiversity Loss: A SW Atlantic Case Study

et al. 2020

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Marine heatwaves (MHWs) are a major concern worldwide due to their increasing impacts in recent years, and these extreme events may trigger deoxygenation of coastal waters affected by sewage and eutrophication. Here we investigate the combined effects of MHWs and nutrient enrichment on the water quality and biodiversity of the Bay of Santa Catarina Island (Brazil). We used historical (1994–2020) sea surface temperature data from satellites and in situ physical, chemical and biological parameters to assess temporal trends. Oxygen levels have been decreasing whilst phosphorus levels have been increasing in the bay. During the austral summer of 2020 a regional sea surface heatwave was detected by satellite, lasting for 9 days and coinciding with our research cruise. During this period, seawater temperatures reached 29.8°C and anoxia was detected for the first time in the bay. A decrease in macrobenthic and phytoplankton community richness correlated with decreases in oxygen both through time and towards more urbanized areas. Overall, poor wastewater treatment is a key stressor that combined with MHWs to degrade coastal waters. Mitigation strategies are needed to minimize the impact of MHWs, including improved sewage treatment, restoration and conservation of wetlands and the use of nature-based technologies to promote coastal ecosystem recovery.

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“…4B) e Anomalocardia flexuosa, imersos em um sedimento lamoso endurecido. O Erodona mactroides é reconhecido como um bivalve mesohalino (salinidade entre 7 e 20‰) habitante de fundos inconsolidados de estuários e de lagoas abertas com comunicação marinha (Netto et al 2018;Rios 1985). Na flotação do sedimento desse sambaqui, foi recuperado grande número de exemplares do microgastrópode Heleobia australis (Fig.…”

Section: Discussionunclassified

Observações prévias sobre a malacofauna em alguns pequenos sambaquis do litoral sul de Santa Catarina

Heitzmann-Fontenelle

Tognoli

Demathe

2021

Rev. Mus. Arqueol. Etnol.

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Foi realizada a análise da malacofauna presente em seis pequenos sambaquis localizados em Jaguaruna-SC com idades entre 3080 e 580 anos AP (Eliza, Encruzo, Campo Bom I, Campo Bom II, Campo Bom III e Arroio da Cruz I). Foram identificadas 24 espécies de moluscos sendo 10 gastrópodes e 12 bivalves. pertencentes a 6 e 10 famílias respectivamente. Todas as espécies eram de ambiente marinho ou estuarino com exceção de duas espécies do caracol terrestre Megalobulimus. Constatou-se a existência de dois padrões distintos quanto à constituição da matriz malacológica dos sítios. Nos sambaquis mais antigos (Eliza e Encruzo) havia maior diversidade de espécies sendo a maioria procedentes de um paleoambiente lagunar e estuarino (Anomalocardia brasiliana, Phacoides pectinatus e Erodona mactroides) incluindo manguezal (Cassostrea brasiliana), com grande variação no tamanho intraespecífico e a ocorrência de indivíduos íntegros com as valvas fechadas. Nos sambaquis com datações mais recentes (Campo Bom I, II e III, e Arroio da Cruz I) havia a presença majoritária de espécies do litoral de mar aberto (Mesodesma mactroides e Donax hanleyanus) com maior uniformidade intraespecífica no tamanho, sendo que a matrix malacológica do Campo Bom II diferenciou-se pela ocorrência adicional de grandes indivíduos do bivalve Tivela zonaria e do gastrópode Pachycymbiola brasiliana, inferindo uma construção diferenciada. Este estudo reforçou a importância da avaliação da matriz malacológica em sambaquis como indicativo do paleoambiente e das opções culturais de seus construtores, bem como que a diversidade de espécies poderia sugerir um uso ou função distinta do sítio.

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Benthic Estuarine Assemblages from the Southern Brazilian Marine Ecoregion

Cited by 17 publications

References 81 publications

The scale‐dependent effect of environmental filters on species turnover and nestedness in an estuarine benthic community

The scale‐dependent effect of environmental filters on species turnover and nestedness in an estuarine benthic community

Marine Heatwaves, Sewage and Eutrophication Combine to Trigger Deoxygenation and Biodiversity Loss: A SW Atlantic Case Study

Observações prévias sobre a malacofauna em alguns pequenos sambaquis do litoral sul de Santa Catarina

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