Salt pulses effects on in-stream litter processing and recovery capacity depend on substrata quality

Oliveira, Ricardo; Martinez, Aingeru Mayor; Gonçalves, Ana Lúcia; Júnior, Edivan S. Almeida; Canhoto, Cristina

doi:10.1016/j.scitotenv.2021.147013

Cited by 9 publications

(5 citation statements)

References 54 publications

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“…On the other hand, it has been previously reported that salinisation appears to control catabolicrelated functions of biofilms at salt concentrations above 0.25 g NaCl L −1 leading to a decrease in the microbial respiration rate (Martínez et al, 2020b). In alignment with our results, Oliveira et al (2021) reported a decrease in the microbial respiration of microbial-mediated litter decomposition subjected to salt additions and da Silva et al (2021) found a negative effect on fungal respiration at a salinity of 16 g L −1 .…”

Section: Discussionsupporting

confidence: 93%

Hypersaline mining effluents affect the structure and function of stream biofilm

Vendrell-Puigmitjà

Proia

Espinosa

et al. 2022

Science of The Total Environment

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Section: Discussionsupporting

confidence: 93%

Hypersaline mining effluents affect the structure and function of stream biofilm

Vendrell-Puigmitjà

Proia

Espinosa

et al. 2022

Science of The Total Environment

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“…Flowpaths that result in salt intrusion are swift, and abrupt shifts in environmental conditions can sometimes influence biomass, behavior, and/or biological activity of certain organisms, under certain circumstances ( Hintz and Relyea 2017 ). Episodic events may not result in noticeable or even measurable changes in systems with high buffering capacity or may lead to significant detectable changes in some cases ( Oliveira et al 2021 ). As episodic events become more frequent over time, and salt concentrations increase, ecological communities should eventually shift to more salt-tolerant species across progressive stages of FSS (below) ( Ury et al 2019 ).…”

Section: Part 2 Time As a State Factor: Progression Of Fss Stages And...mentioning

confidence: 99%

Five state factors control progressive stages of freshwater salinization syndrome

Kaushal

Mayer

Likens

et al. 2022

Limnol Oceanogr Letters

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Factors driving freshwater salinization syndrome (FSS) influence the severity of impacts and chances for recovery. We hypothesize that spread of FSS across ecosystems is a function of interactions among five state factors: human activities, geology, flowpaths, climate, and time. (1) Human activities drive pulsed or chronic inputs of salt ions and mobilization of chemical contaminants. (2) Geology drives rates of erosion, weathering, ion exchange, and acidification‐alkalinization. (3) Flowpaths drive salinization and contaminant mobilization along hydrologic cycles. (4) Climate drives rising water temperatures, salt stress, and evaporative concentration of ions and saltwater intrusion. (5) Time influences consequences, thresholds, and potentials for ecosystem recovery. We hypothesize that state factors advance FSS in distinct stages, which eventually contribute to failures in systems‐level functions (supporting drinking water, crops, biodiversity, infrastructure, etc.). We present future research directions for protecting freshwaters at risk based on five state factors and stages from diagnosis to prognosis to cure.

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“…Palabras clave: ciclos biogeoquímicos acuáticos, sal de carreteras, flujo de nutrientes, flujo de oxígeno, interfase sedimentoagua Salt pulses can also affect microbial respiration rates in wetland sediments, on aquatic biofilms, and in association with terrestrial organic matter decomposition (Almeida Júnior et al, 2020;Chambers et al, 2011;Martínez et al, 2020;Oliveira et al, 2021;Silva & Davies, 1999). At high chloride concentrations (> 1000 mg Cl -/L), evidence of ionic stress causing a metabolic shutdown is often inferred through reductions in microbial respiration rates after chloride exposure (although see: Chambers et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…At high chloride concentrations (> 1000 mg Cl -/L), evidence of ionic stress causing a metabolic shutdown is often inferred through reductions in microbial respiration rates after chloride exposure (although see: Chambers et al, 2011). At low to intermediate chloride concentrations (10s to 500 mg Cl -/L), the chloride pulses can increase microbial respiration, possibly indicating stimulated decomposition of organic matter or an early metabolic response to ionic stress (Cochero et al, 2017;Martínez et al, 2020;Oliveira et al, 2021;Silva et al, 2000). The magnitude of these respiration responses varies across sites and depends in part on site specific conditions, ambient chloride pollution levels, organic matter quality, and microbial community composition (Cochero et al, 2017;Martínez et al, 2020;Oliveira et al, 2021;Silva et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

“…At low to intermediate chloride concentrations (10s to 500 mg Cl -/L), the chloride pulses can increase microbial respiration, possibly indicating stimulated decomposition of organic matter or an early metabolic response to ionic stress (Cochero et al, 2017;Martínez et al, 2020;Oliveira et al, 2021;Silva et al, 2000). The magnitude of these respiration responses varies across sites and depends in part on site specific conditions, ambient chloride pollution levels, organic matter quality, and microbial community composition (Cochero et al, 2017;Martínez et al, 2020;Oliveira et al, 2021;Silva et al, 2000). Respiration responses have been found to be short in duration and reversable, but nonetheless signal that chloride pulses could have major episodic effects on aquatic carbon cycles and are a cause for concern.…”

Section: Introductionmentioning

confidence: 99%

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Add a dash of salt? Effects of road de-icing salt (NaCl) on benthic respiration and nutrient fluxes in freshwater sediments

Williams¹,

Frost²,

Ginn³

et al. 2023

Limnetica

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Winter road salt applications are increasing chloride concentrations in many freshwater ecosystems. This trend is alarming, giv¬en chloride’s potential to impair aquatic ecosystems. Short- and long-term exposure to salt could affect ecosystem metabolism and nutrient cycles. Here, we examine connections between chloride concentrations, water quality conditions, benthic respi¬ration, and sediment-water nutrient flux throughout a large (722 km2) lake and its catchment. Aquatic locations experiencing high concentrations of chloride are indicators of anthropogenic activities and are often associated with additional pollutants. We used sediment core flow-through incubations under ambient and enriched chloride concentrations to determine the effects of road salt on benthic respiration and nutrient fluxes in stream, stormwater pond, and lake sites. Salt (as sodium chloride) ad¬ditions caused a significant overall increase in benthic respiration. Acute exposure to road salt caused the strongest increase in benthic respiration when water was warm and at sites that had low (< 50 mg Cl-/L) or high (> 400 mg Cl-/L) ambient chloride concentrations or when water was cold and sites had intermediate (100-400 mg Cl-/L) ambient chloride concentrations. Nitrate flux responded less uniformly to salt additions. Depending on waterbody type and season, ambient nitrate flux into the sediment was similar, increased, or decreased post-chloride addition. Dissolved phosphorus flux was not significantly impacted by salt additions. Across lake and stream sites, our results supported the hypothesis that chloride causes increased respiration while nutrient cycles were weakly and inconsistently altered under experimental pulse road salt additions.

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Salt pulses effects on in-stream litter processing and recovery capacity depend on substrata quality

Cited by 9 publications

References 54 publications

Hypersaline mining effluents affect the structure and function of stream biofilm

Hypersaline mining effluents affect the structure and function of stream biofilm

Five state factors control progressive stages of freshwater salinization syndrome

Add a dash of salt? Effects of road de-icing salt (NaCl) on benthic respiration and nutrient fluxes in freshwater sediments

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