Insights into the Ecology of Foraminifera from the Most Hypersaline Lagoon in Brazil: Vermelha Lagoon

Laut, Lázaro; Belart, Pierre; Carelli, Thiago Gonçalves; Martins, Maria Virgínia Alves; Laut, Vanessa Mattos

doi:10.1007/s12237-022-01073-x

Cited by 7 publications

(1 citation statement)

References 88 publications

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“…Vermelha lagoon stations were all grouped together with the highest values of salinity and lowest values of TS associated with the dominance of porcelaneous foraminifera (miliolids). Laut et al (2022) report that the dominance of porcelaneous species (mainly Quinqueloculina seminulum) in the Vermelha lagoon is related to hypersalinity and high primary productivity in the region. The species distribution along Maricá-Guarapina…”

Section: Discussionmentioning

confidence: 99%

Metacommunity structure of benthic foraminifera in Rio de Janeiro coastal lagoons

Belart,

Lorini,

Figueiredo

et al. 2024

Preprint

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Metacommunity theory addresses local interactions and regional processes, offering a powerful framework to comprehend the species composition of a region and the factors that shape its structure along environmental gradients. By incorporating spatial dynamics, the metacommunity analysis explores the relationships that govern the ecological communities at different spatial scales. The objective of this work is to describe the structure of a metacommunity of living foraminifera, to relate it to physical and chemical variables of water and sediment, and to identify the environmental characteristics associated to the assemblages. A total of 534,416 living foraminifera, belonging to 65 species, were collected at 106 stations across five tropical urban coastal lagoons along the coast of the Rio de Janeiro State (Brazil), subjected to a strong salinity gradient. The results of the Elements of Metacommunity Structure (EMS) analysis identified four distinct assemblages of living foraminifera across the lagoonal systems. These metacommunities fitted a quasi-nested pattern, with the total variation explained by a shared influence of environmental factors (primarily hydrological drivers associated with marine influence, such as salinity, pH, and temperature) and spatial predictors. Organic enrichment descriptors (TOC, TS, CHO, PTN, LIP) played a secondary role in the ordination of the sites. The findings of this work demonstrate the potential of the EMS approach as a valuable tool for establishing a baseline in environmental monitoring plans.

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Section: Discussionmentioning

confidence: 99%

Metacommunity structure of benthic foraminifera in Rio de Janeiro coastal lagoons

Belart,

Lorini,

Figueiredo

et al. 2024

Preprint

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Recognizing Low-Inflow Estuaries as a Common Estuary Paradigm

Largier

2023

Estuaries and Coasts

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It has become clear that estuaries with low rates of freshwater inflow are an important but overlooked sphere of estuarine science. Low-inflow estuaries (LIEs) represent a major class of estuary long downplayed because observations do not fit well in the dominant estuary paradigm, which was developed in perennially wet climates. Rather than being rare and unusual, it is now evident that LIEs are common globally and an alternate estuary paradigm within the idea of an estuary as the place where a river meets the sea. They are found mostly in areas with arid, semi-arid, or seasonally arid climates, but LIE phenomena are also found in estuaries along mountainous coasts with small watersheds and short-tailed hydrographs. Inflows can be defined as “low” relative to basin volume, tidal mixing, evaporative losses, or wave forcing at the mouth. The focus here is on common physical phenomena that emerge in low-inflow estuaries—how low river flow is expressed in estuaries. The most common is hypersalinity (and the associated potential for inverse conditions), which develops where there is a net negative water balance. However, in small microtidal estuaries, low inflow results in mouth closure even as a positive water balance may persist, accounting for extreme stratification. Attention is also given to the longitudinal density gradient and the occurrence of thermal estuaries and inverse estuaries. Finally, ocean-driven estuaries are highlighted where marine subsidies (nutrients, particulates) dominate watershed subsidies. While climate change is altering freshwater inflow to estuaries, locally driven changes are generally more important and this presents an opportunity to restore estuaries through restoring estuarine hydrology.

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Metacommunity Structure of Benthic Foraminifera in Rio de Janeiro Coastal Lagoons

Belart,

Figueiredo,

Bonetti

et al. 2024

Estuaries and Coasts

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Insights into the Ecology of Foraminifera from the Most Hypersaline Lagoon in Brazil: Vermelha Lagoon

Cited by 7 publications

References 88 publications

Metacommunity structure of benthic foraminifera in Rio de Janeiro coastal lagoons

Metacommunity structure of benthic foraminifera in Rio de Janeiro coastal lagoons

Recognizing Low-Inflow Estuaries as a Common Estuary Paradigm

Metacommunity Structure of Benthic Foraminifera in Rio de Janeiro Coastal Lagoons

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