Biomass estimation across the benthic community in polluted freshwater sediment—A promising endpoint in microcosm studies?

Faupel, Michael; Ristau, Kai; Traunspurger, Walter

doi:10.1016/j.ecoenv.2011.06.022

Cited by 12 publications

(5 citation statements)

References 47 publications

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“…In addition, the biomasses of the organisms were compared across different treatments, and the concentration showing a significant effect was as low as 5.2 mg/kg. The order of sensitivities of these 3 endpoints was biomass > diversity > abundance, which was consistent with the findings of Faupel et al (2011), who reported that biomass could be quantified to serve as a promising endpoint when studying ecotoxicology microcosms. Moreover, it is believed that biomass can provide more information than abundance data about a habitat's condition and that functional parameters, such as secondary production estimates, rely on biomass values (Reiss and Schmid‐Araya 2010).…”

Section: Discussionsupporting

confidence: 89%

“…In previous studies, the abundance, biomass, and community structure have been found to show significant differences under different levels of stress; and these indexes have been widely used in microcosms to assess sediment quality (Townsend et al 2009; Faupel et al 2012). Biomass has been recommended as a test endpoint in single‐species toxicity tests (Organisation for Economic Co‐operation and Development 2006, 2007) and provides the baseline data needed to perform energy‐flow and secondary productivity estimations and to assess a system's trophic status (Faupel et al 2011). In the present study, abundance, biodiversity, and biomass were calculated and measured for all field treatments.…”

Section: Discussionmentioning

confidence: 99%

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Comparing the Impacts of Sediment‐Spiked Cadmium on Chironomidae Larvae in Laboratory Bioassays and Field Microcosms and the Implications for Field Validation of Site‐Specific Threshold Concentrations

Liu

Zhang

Xin

et al. 2021

Enviro Toxic and Chemistry

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Information on the effects of pollutants in sediments at an ecosystem level to validate current and proposed risk‐assessment procedures is scarce. The most frequent criticism of these procedures is that responses of surrogate species in the laboratory are not representative of responses of natural populations. A tiered approach using both laboratory and microcosm exposures (96‐h and 21‐d laboratory bioassays and a 3‐mo field microcosm) was conducted to compare the impacts of sediment‐spiked cadmium on the mortality, development, and abundance of Chironomidae larvae. The 96‐h and 21‐d lethal concentrations of sediment‐spiked Cd to 50% of the species Chironomus riparius were estimated to be 201.07 and 172.66 mg/kg, respectively. In the 21‐d laboratory bioassay, the endpoints, including the development rate and emergence ratio, were compared, and the lowest‐observed‐effect concentration (LOEC) values were 325.8 and 10.7 mg/kg, respectively. The abundance, richness, and biomass of field‐collected larvae were compared among the different treatments in the field microcosm, and it was found that the order of sensitivities using different endpoints was biomass (2.6/5.2 mg/kg of no‐observed‐effect concentration/LOEC) > diversity (10.7/21.2 mg/kg) > abundance (41.2/82.7 mg/kg). The toxicity values based on lethal/sublethal changes in the laboratory bioassays might not fully protect field organisms against damage from chemicals, such as Cd, unless an assessment factor of 5 is used. These findings highlight the need to conduct field validation of criteria/guidelines before they are introduced to protect organisms/ecosystems in the field and provide a preliminary template for future field validation of criteria elsewhere. Environ Toxicol Chem 2021;40:2450–2462. © 2021 SETAC

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Comparing the Impacts of Sediment‐Spiked Cadmium on Chironomidae Larvae in Laboratory Bioassays and Field Microcosms and the Implications for Field Validation of Site‐Specific Threshold Concentrations

Liu

Zhang

Xin

et al. 2021

Enviro Toxic and Chemistry

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“…In this research, we confirmed literature data that demonstrated important damages caused by contaminated food on life history, like reproductive parameters (Geffard et al 2008), growth (Knops et al 2001), survival (Wang et al 2010), feeding rates (Rodgher and Espíndola 2008), and secondary production (Faupel et al 2011). These effects were detected in different phases of the organisms' life history, and impaired the viability of the organisms tested in the present study.…”

Section: Discussionsupporting

confidence: 87%

“…Secondary production is rarely included in biological assessments, although biomass accumulation has been recommended as endpoint in single-species toxicity testing (OECD 2006(OECD , 2007. Secondary production rates provide the baseline data needed to assess energy flow and trophic status in aquatic ecosystems, and illustrate aspects related to the ecological fitness of organisms (Faupel et al 2011). Indeed, it is well established that secondary production is one of the major energy flow pathways in most freshwater ecosystems (Faupel et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Effects of dietborne cadmium on life history and secondary production of a tropical freshwater cladoceran

et al. 2014

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The presence of metals in aquatic environments has increased worldwide. Environmental assessments of metals in freshwater ecosystems presume that toxicity is mainly caused by aqueous exposure, but dietborne exposure (contaminated food) in zooplankton may occur because microalgae carry metal ions through adsorption/absorption of dissolved metal species, resulting in toxic effects once ingested by the animals. However, official regulations for ecotoxicological assays in most countries do not consider the toxic effects caused by dietborne exposure. Here, we provide life history parameters and secondary production of Simocephalus serrulatus (Koch 1841) (Cladocera: Daphniidae) fed with cadmium (Cd) contaminated algae during a 21-day bioassay. The microalgae Chlorophyceae Scenedesmus quadricauda was exposed for 96 h to dissolved Cd concentrations of 0.03; 5.87; 12.27 and 22.27 µg Cd l(-1) (equivalent to 1.6 × 10(-10); 3.2 × 10(-8); 6.7 × 10(-8); 1.2 × 10(-7) mol l(-1)) that resulted in algae internal Cd burdens of 0.004; 0.032; 0.270 and 0.280 pg Cd cell(-1), respectively. Significant toxic effects on life history parameters of S. serrulatus were observed. Time of embryonic development, generation time and age at first reproduction (primipara) showed significant delay. Length at first reproduction, number of eggs and clutches produced per female, hatching percentage, body length, survival and feeding rates were significantly reduced. Secondary production, that is, accumulated biomass for growth and reproduction, decreased significantly with dietborne Cd concentrations. Our results emphasize that food can be an important source of metals to zooplankton in aquatic ecosystems. Environmental regulations should consider the diet in ecotoxicological assessments. Furthermore, secondary production may be considered as a suitable endpoint in ecotoxicity tests.

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“…In marine microcosms, Louati et al [35] showed that under nutrient-limited conditions bacterial communities respond more strongly to the presence of meiofauna than to PAH contamination, whereas meiofauna are distinctly disturbed by PAHs. These results agree with those of a freshwater microcosm study in which bacterial biomass was not affected by cadmium treatment whereas both meiofauna and protozoa showed a strong decrease in biomass [36]. The effect of NPs on the structure and function of bacterial and faunal communities in freshwater systems has yet to be investigated.…”

Section: Introductionmentioning

confidence: 99%

Response of bacteria and meiofauna to iron oxide colloids in sediments of freshwater microcosms

Höss¹,

Frank-Fahle

Lueders

et al. 2015

Enviro Toxic and Chemistry

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The use of colloidal iron oxide (FeOx) in the bioremediation of groundwater contamination implies its increasing release into the environment and requires an assessment of its ecotoxicological risk. Therefore, microcosm experiments were carried out to investigate the impact of ferrihydrite colloids on the bacterial and meiofaunal communities of pristine freshwater sediments. The effects of ferrihydrite colloids were compared with those of ferrihydrite macroaggregates to discriminate between colloid-specific and general FeOx impacts. The influence of ferrihydrite colloids on the toxicity of sediment-bound fluoranthene was also considered. At high concentrations (496 mg Fe kg(-1) sediment dry wt), ferrihydrite colloids had a significant, but transient impact on bacterial and meiofaunal communities. Although bacterial community composition specifically responded to ferrihydrite colloids, a more general FeOx effect was observed for meiofauna. Bacterial activity responded most sensitively (already at 55 mg Fe kg(-1) dry wt) without the potential of recovery. Ferrihydrite colloids did not influence the toxicity of sediment-bound fluoranthene. Significant correlations between bacterial activity and meiofaunal abundances were indicative of trophic interactions between bacteria and meiofauna and therefore of the contribution of indirect food web effects to the observed impacts. The results suggest that the application of ferrihydrite colloids for remediation purposes in the field poses no risk for benthic communities, given that, with the exception of generic bacterial activity, any negative effects on communities were reversible.

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Biomass estimation across the benthic community in polluted freshwater sediment—A promising endpoint in microcosm studies?

Cited by 12 publications

References 47 publications

Comparing the Impacts of Sediment‐Spiked Cadmium on Chironomidae Larvae in Laboratory Bioassays and Field Microcosms and the Implications for Field Validation of Site‐Specific Threshold Concentrations

Comparing the Impacts of Sediment‐Spiked Cadmium on Chironomidae Larvae in Laboratory Bioassays and Field Microcosms and the Implications for Field Validation of Site‐Specific Threshold Concentrations

Effects of dietborne cadmium on life history and secondary production of a tropical freshwater cladoceran

Response of bacteria and meiofauna to iron oxide colloids in sediments of freshwater microcosms

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