Chronic effects of temperature and nitrate pollution on Daphnia magna: Is this cladoceran suitable for widespread use as a tertiary treatment?

Maceda‐Veiga, Alberto; Webster, Gordon; Canals, Oriol; Salvadó, Humbert; Weightman, Andrew J.; Cable, Joanne

doi:10.1016/j.watres.2015.06.036

Cited by 28 publications

(22 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…McMahon [14] found the maximum FC of D . magna was 24°C, whereas other authors, all of whom had performed a previous long-term acclimation at 20°C, fixed the optimal temperature as being between 20 and 21°C [2,21,31]. Moreover, mortality quantifications show that above 26°C, the survival of D .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Temperature-driven response reversibility and short-term quasi-acclimation of Daphnia magna

2018

View full text Add to dashboard Cite

Analysing the effect water temperature has on Daphnia magna is essential in anticipating the impact climate change will have on this freshwater zooplanktonic keystone species. While many authors have followed this line of research, few have covered an extensive temperature range or complex temperature change scenarios. Global warming is mostly associated with increased extreme temperature events, such as heat waves, as well as earlier and more intense thermal stratification. Both of these events may directly influence D. magna fitness, especially in those populations performing diel vertical migration (DVM). We analysed the effect water temperatures, ranging from 11 to 29°C, have on the filtration capacity (FC) of D. magna, to anticipate the effects of acclimation, temperature change rate (TCR) and potential reversibility of responses to such conditions. Results show that sudden temperature changes have an immediate negative impact on the FC of D. magna and is more severe at higher temperatures and higher TCRs. However, D. magna individuals have shown themselves to be capable of quasi-acclimating to temperatures ranging from 11 to 25°C in around a week and achieving much higher FCs; albeit never reaching the optimal FC achieved at 20°C. That said, 29°C is lethal for D. magna individuals within approximately five days. Finally, non-optimal temperature acclimated individuals can recover maximal FC within 2–4 days of the optimal long-term acclimation temperature (20°C) being re-established, thus proving temperature responses to be reversible.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Moreover, mortality quantifications show that above 26°C, the survival of D . magna decreases drastically [12,21]. However, few studies cover an extensive temperature range [15] that includes both the low and high pessimum ranges.…”

Section: Introductionmentioning

confidence: 99%

Temperature-driven response reversibility and short-term quasi-acclimation of Daphnia magna

2018

View full text Add to dashboard Cite

show abstract

“…They found efficiencies in the range of 12-30 % for Daphnia concentrations in the range from 10 to 50 ind l -1 . Maceda-Veiga et al (2015) studied the vulnerability of Daphnia magna for both water temperature and nitrate concentration. Daphnia vulnerability increased in temperatures above 26°C and/or NO 3 -above 250 mg l -1 .…”

Section: Introductionmentioning

confidence: 99%

The hydraulic retention time on the particle removal efficiency by Daphnia magna filtration on treated wastewater

Serra

Colomer

2016

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

The study of low-cost techniques for the tertiary treatment of wastewater is of global interest; above all low-energy techniques that do not require the use of chemicals. In this study, a wastewater treatment technology based on the filtration by a zooplanktonic population (Daphnia magna) is studied in controlled laboratory and mesocosm experiments for different hydraulic retention times (HRT). The efficiency of the treatment is evaluated in terms of particle removal efficiency. From laboratory experiments, HRT over 12 h and Daphnia concentrations above 50 individuals l -1 guarantee a particle removal efficiency greater than 30 %. However, low HRT of 6 h would require Daphnia concentrations above 70 individuals l -1 in order to obtain a particle removal efficiency of 20 %. The minimum removal efficiency of 2 % was for HRT = 3 h, independent of the Daphnia concentration. In the mesocosm, the growth of Daphnia individuals enhanced Daphnia magna filtering rates and higher removal efficiencies than those in the laboratory for the same HRT range. In the mesocosm experiments E. coli concentrations were reduced to a maximum of 2 logarithmic units. A balance equation model is proposed to predict particle removal efficiencies for varying HRT.

show abstract

“…Clarification is an important stage in the physical-chemical water and wastewater treatment process and has great theoretical and practical importance, including applications for the water industry and water recycling systems, using chemical and/or bioflocculants (Khannous et al, 2011;Ugbenyen and Okoh, 2014;Maceda-Veiga et al, 2015;Mudhiriza et al, 2015;Agunbiade et al, 2016;Ma et al, 2017;Shaikh et al, 2017;Watanabe, 2017). It is fully dependent on the interaction between suspended particles present in fluids, since this interaction promotes floc formation and breakup.…”

Section: Introductionmentioning

confidence: 99%

Mathematical modelling and analysis of the flocculation process in low retention time hydraulic flocculators

Oliveira

Donadel²

2019

WSA

View full text Add to dashboard Cite

This article aims to advance the understanding of particle interactions in low retention time flocculators and proposes a new flocculation model that appropriately considers the influence of retention time in flocculation processes. This consideration is important for units with flocculation time lower than 1 min, as seen in helically coiled tube flocculators (HCTFs), whose retention time is significantly lower than conventional flocculation units (about 30 min). With this, it was possible to obtain a more adherent model, reducing deviations between results obtained by physical modelling (using HCTFs, 48 tests) and those obtained with the proposed model, when compared with results obtained using the flocculation models commonly used for this purpose. The decreasing-rising behaviour presented by experimental data for process efficiency versus retention time, not verified in the benchmark models, was satisfactorily addressed by the proposed model. Furthermore, maximum and average absolute percentage deviations obtained using the model proposed in this study were less than or equal to the results obtained with the benchmark models and less for experimental uncertainty (10%). The results obtained indicate that this model can be a useful tool to support the rational design of low retention time units, including applications for the water industry and water recycling systems.

show abstract

Chronic effects of temperature and nitrate pollution on Daphnia magna: Is this cladoceran suitable for widespread use as a tertiary treatment?

Cited by 28 publications

References 74 publications

Temperature-driven response reversibility and short-term quasi-acclimation of Daphnia magna

Temperature-driven response reversibility and short-term quasi-acclimation of Daphnia magna

The hydraulic retention time on the particle removal efficiency by Daphnia magna filtration on treated wastewater

Mathematical modelling and analysis of the flocculation process in low retention time hydraulic flocculators

Contact Info

Product

Resources

About