Nutrients and chlorophyll-a exchanges through an inlet of the Ria Formosa Lagoon, SW Iberia during the productive season – Unravelling the role of the driving forces

Cravo, Alexandra; Cardeira, Sara; Pereira, Catarina; Rosa, Mónica; Alcântara, Pedro; Madureira, Miguel; Rita, Filomena; Correia, Carla; Rosa, Alexandra; Jacob, José

doi:10.1016/j.seares.2018.12.001

Cited by 13 publications

(5 citation statements)

References 27 publications

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“…The Ria Formosa lagoon at sites ST#0 and ST#3 (Figure 1), close to main channels, is well mixed vertically, with no evidence of persistent saline or termal stratification due to reduced freshwater inputs. There, typical physicochemical values are salinity ≥36, pH approximately 8, and dissolved oxygen close to saturation (Falcao 2003; Newton and Mudge 2003; Cravo et al 2019; Rosa et al 2019).…”

Section: Methodsmentioning

confidence: 99%

Biomarker Responses of the Clam Ruditapes decussatus Exposed to a Complex Mixture of Environmental Stressors under the Influence of an Urban Wastewater‐Treatment Plant

Silva

Cravo

Ferreira

et al. 2020

Enviro Toxic and Chemistry

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To evaluate the potential impact of an urban wastewater-treatment plant on Ria Formosa coastal lagoon, a sentinel species, the clam Ruditapes decussatus, was exposed along a gradient of the effluent's dispersal for 1 mo. Three exposure sites were selected to study the responses of 3 biomarkers: electron transport system, acetylcholinesterase, and lipid peroxidation. As complementary data, morphometric measurements, condition index, and lipid and protein content were considered together with in situ physicochemical characterization of the sites (temperature, salinity, pH, and dissolved oxygen). Electron transport system activity levels were between 35.7 and 50.5 nmol O 2 /min g protein, acetylcholinesterase activity levels ranged from 2.6 to 3.8 nmol/min g protein, and lipid peroxidation ranged from 174.7 to 246.4 nmol malondialdehyde/g protein. The exposure sites shaped the response not only of biomarkers but also of "health" parameters (protein, lipids, and condition index). Lipid peroxidation was the most responsive biomarker also associated with electron transport system, especially at the closest site to the urban wastewater-treatment plant. Because of the presence of complex mixtures of contaminants in urban effluents, biomarker responses can provide valuable information in environmental assessment. However, it is vital to identify all biological and ecological factors induced by the natural life cycle of clams. Abiotic factors can mask or overlap the response of biomarkers and should be considered in a multibiomarker approach.

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Section: Methodsmentioning

confidence: 99%

Biomarker Responses of the Clam Ruditapes decussatus Exposed to a Complex Mixture of Environmental Stressors under the Influence of an Urban Wastewater‐Treatment Plant

Silva

Cravo

Ferreira

et al. 2020

Enviro Toxic and Chemistry

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“…At OE area, a deeper and wider main channel near one the main RF lagoon inlets (Jacob and Cravo, 2019), high tidal exchange rate promotes rapid advection, mixing, dispersion, and dilution of WWTPs effluents and related constituents, explaining the relative improvement in water quality, in respect with FNW area, and the absence of along transect variability. High exchange of lagoon water and adjacent coastal seawater dilutes and horizontally exports bacterial indicators of faecal contamination (Martins et al, 2006;Cravo et al, 2015;Veríssimo et al, 2019), nutrients (ammonium, phosphate; Newton et al, 2003;Newton and Mudge, 2005;Falcão and Vale, 2003;Cravo et al, 2015), and phytoplankton biomass into the coastal area (Barbosa, 2006(Barbosa, , 2010Cravo et al, 2019;Rosa et al, 2019), being generally responsible for the reduced susceptibility of the RF lagoon to eutrophication (Tett et al, 2003;Newton and Mudge, 2005;Mudge et al, 2008;Domingues et al, 2015Domingues et al, , 2017aDomingues et al, , 2017b. In contrast, microtidal restricted coastal systems subjected to high nutrient loads generally develop eutrophication symptoms (Tett et al, 2003;García-Pintado et al, 2007;McGlathery et al, 2007;Bricker et al, 2008;Roselli et al, 2013;Newton et al, 2014).…”

Section: Wastewater Footprints At Contrasting Ria Formosa Lagoon Areasmentioning

confidence: 99%

“…The strong connectivity between RF and adjacent coastal waters, with importation of nutrient and phytoplankton rich water masses into the RF lagoon, during coastal upwelling events (Barbosa, 2010;Brito et al, 2012;Cravo et al, 2014Cravo et al, , 2019Domingues et al, 2015;Rosa et al, 2019), also advect HAB-forming taxa into the RF lagoon. This demonstrates that increases in phytoplankton should not be solely attributed to human stressors, namely WWTP discharges.…”

Section: Influence Of Wastewater Discharges On the Intra-annual Varia...mentioning

confidence: 99%

Unravelling the effects of treated wastewater discharges on the water quality in a coastal lagoon system (Ria Formosa, South Portugal): Relevance of hydrodynamic conditions

Cravo

Barbosa

Correia

et al. 2022

Marine Pollution Bulletin

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“…However, the typical physicochemical values in the Ria Formosa lagoon close to the clam nursery were as follows: salinity ≥ 36, pH around 8 and dissolved oxygen close to saturation [35,36].…”

Section: Sampling and Exposure Conditionsmentioning

confidence: 99%

Potential Impact of UWWT Effluent Discharges on Ruditapes decussatus: An Approach Using Biomarkers

Silva¹,

Cravo²,

Rodrigues³

et al. 2021

AEER

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The use of biomarkers in bivalves has gained significance as a reliable method for the assessment of the presence and effect of contaminants in aquatic ecosystems. However, it is important to note that the biomarkers respond not only to contaminant loadings and bioavailability but also to environmental stress. Therefore, the association between biomarkers and contamination/pollution should be conducted cautiously as the environmental factors also affect their response. These factors should be integrated into the assessment of the response of the biomarkers. The potential impact of effluents from an urban wastewater treatment plant (UWWTP) on the Ruditapes decussatus clam specimens located 1.5 Km away in a surrounding area was evaluated. After one month of exposure, three biomarkers were analyzed, namely lipid peroxidation (LPO), acetylcholinesterase (AChE) and electron transport system (ETS). These parameters were also determined for a control group purchased from a local nursery, which had no influence from UWWTP, in order to compare the results obtained from both groups. The in situ physicochemical characterization of the exposure site (temperature, salinity, pH and dissolved oxygen) was evaluated together with nutritional parameters, morphometric measurements and condition index. The biochemical analysis showed that the activity levels of AChE fluctuated from 4.0 to 4.6 nmol/min g protein and that of LPO from 101.5 to 248.9 nmol MDA/g protein. Also, the ETS activity levels were in the range of 27.2 to 30.2 nmol O2/min g protein. The lipid peroxidation was found to be the most responsive biomarker toward the damage caused by environmental conditions on the clams.

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Nutrients and chlorophyll-a exchanges through an inlet of the Ria Formosa Lagoon, SW Iberia during the productive season – Unravelling the role of the driving forces

Cited by 13 publications

References 27 publications

Biomarker Responses of the Clam Ruditapes decussatus Exposed to a Complex Mixture of Environmental Stressors under the Influence of an Urban Wastewater‐Treatment Plant

Biomarker Responses of the Clam Ruditapes decussatus Exposed to a Complex Mixture of Environmental Stressors under the Influence of an Urban Wastewater‐Treatment Plant

Unravelling the effects of treated wastewater discharges on the water quality in a coastal lagoon system (Ria Formosa, South Portugal): Relevance of hydrodynamic conditions

Potential Impact of UWWT Effluent Discharges on Ruditapes decussatus: An Approach Using Biomarkers

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