Sediment Bioaccumulation Test with Lumbriculus variegatus: Effects of Feeding

Burkhard, Lawrence P.; Hubin-Barrows, Dylan; Billa, Nanditha; Highland, Terry L.; Hockett, J. Russell; Mount, David R.; Norberg‐King, Teresa J.; Hawthorne, Steven B.; Miller, David J.; Grabanski, Carol B.

doi:10.1007/s00244-015-0148-5

Cited by 10 publications

(9 citation statements)

References 16 publications

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“…The behavior of smaller weight losses and/or even weight gains with lower loadings is likely related to the amount of nutrition/food in the sediments because with fewer organisms, more food is available per individual. L. variegatus starved for 28 days, by placement on a substrate of glass beads, had a weight change of -24 % (SD = 2.8 %) (Burkhard et al 2015). For the two sediments with low OC content (MH-9 and HR-85), the weight losses were similar to that observed with the starved organisms.…”

Section: Resultsmentioning

confidence: 64%

Sediment Bioaccumulation Test with Lumbriculus variegatus: Effects of Organism Loading

Burkhard

Hubin-Barrows²,

Billa³

et al. 2016

Arch Environ Contam Toxicol

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At contaminated sediment sites, the bioavailability of contaminants in sediments is assessed using sediment-bioaccumulation tests with Lumbriculus variegates (Lv). The testing protocols recommend that ratio of total organic carbon (TOC) in sediment to L. variegatus (dry weight) (TOC/Lv) should be no less than 50:1. Occasionally, this recommendation is not followed, especially with sediments having low TOC, e.g., <1 %. This study evaluated the impacts and resulting biases in the testing results when the recommendation of "no less than 50:1" is not followed. In the study, seven sediments were tested with a series of TOC/Lv ratios that spanned the recommendation. With increasing loading of organisms, growth of the organisms decreased in six of the seven sediments tested. Residues of polychlorinated biphenyls (PCBs) in the L. variegatus were measured in six of the seven sediments tested, and differences in PCB residues among loading ratios across all sediments were small, i.e., ±50 %, from those measured at the minimum recommended ratio of 50:1 TOC/Lv. In all sediment, PCB residues increased with increasing loading of the organisms for the mono-, di-, and tri-chloro-PCBs. For tetra-chloro and heavier PCBs, residues increased with increasing loading of organisms for only two of the six sediments. PCB residues were not significantly different between TOC/Lv loadings of 50:1 and mid-20:1 ratios indicating that equivalent results can be obtained with TOC/Lv ratios into the mid-20:1 ratios. Overall, the testing results suggest that when testing recommendation of 50:1 TOC/Lv is not followed, potential biases in the biota-sediment accumulations factors from the sediment-bioaccumulation test will be small.

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Section: Resultsmentioning

confidence: 64%

Sediment Bioaccumulation Test with Lumbriculus variegatus: Effects of Organism Loading

Burkhard

Hubin-Barrows²,

Billa³

et al. 2016

Arch Environ Contam Toxicol

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“…Sediment-bioaccumulation tests were performed by comparing treatments with and without supplemental feeding of Lumbriculus variegatus with tropical fish food and also comparing performance food introduced as blended slurry versus fine flakes (Burkhard et al, 2015). Relative weight change during exposure varied across sediments in the absence of food, from very little change to as much as a 40 % decrease from starting weight.…”

Section: Methodsmentioning

confidence: 99%

Contaminated Aquatic Sediments

Jaglal¹

2016

Water Environment Research

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“…ammonia and oxygen levels) will be negatively affected by their degradation products. Also standard sediment-bioaccumulation tests specify that Lv should not be fed during the 28-day exposure [ 20 ] in order to maintain water quality and to avoid any disturbance in contaminant bioavailability.…”

Section: Introductionmentioning

confidence: 99%

Agar Sediment Test for Assessing the Suitability of Organic Waste Streams for Recovering Nutrients by the Aquatic Worm Lumbriculus variegatus

et al. 2016

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An agar sediment test was developed to evaluate the suitability of organic waste streams from the food industry for recovering nutrients by the aquatic worm Lumbriculus variegatus (Lv). The effects of agar gel, sand, and food quantities in the sediment test on worm growth, reproduction, and water quality were studied. Agar gel addition ameliorated growth conditions by reducing food hydrolysis and altering sediment structure. Best results for combined reproduction and growth were obtained with 0.6% agar-gel (20 ml), 10 g. fine sand, 40 g. coarse sand, and 105 mg fish food (Tetramin). With agar gel, ingestion and growth is more the result of addition of food in its original quality. Final tests with secondary potato starch sludge and wheat bran demonstrated that this test is appropriate for the comparison of solid feedstuffs and suspended organic waste streams. This test method is expected to be suitable for organic waste studies using other sediment dwelling invertebrates.

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Sediment Bioaccumulation Test with Lumbriculus variegatus: Effects of Feeding

Cited by 10 publications

References 16 publications

Sediment Bioaccumulation Test with Lumbriculus variegatus: Effects of Organism Loading

Sediment Bioaccumulation Test with Lumbriculus variegatus: Effects of Organism Loading

Contaminated Aquatic Sediments

Agar Sediment Test for Assessing the Suitability of Organic Waste Streams for Recovering Nutrients by the Aquatic Worm Lumbriculus variegatus

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