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- W2270740282 endingPage "e0147534" @default.
- W2270740282 startingPage "e0147534" @default.
- W2270740282 abstract "Rationale and Experimental Approach Aggregate dredging is a growing source of anthropogenic disturbance in coastal UK waters and has the potential to impact marine systems through the smothering of benthic fauna with organically loaded screening discards. This study investigates the tolerance of the blue mussel, Mytilus edulis to such episodic smothering events using a multi-factorial design, including organic matter concentration, temperature, sediment fraction size and duration of burial as important predictor variables. Results and Discussion Mussel mortality was significantly higher in organically loaded burials when compared to control sediments after just 2 days. Particularly, M. edulis specimens under burial in fine sediment with high (1%) concentrations of organic matter experienced a significantly higher mortality rate (p<0.01) than those under coarse control aggregates. Additionally, mussels exposed to the summer maximum temperature treatment (20°C) exhibited significantly increased mortality (p<0.01) compared to those in the ambient treatment group (15°C). Total Oxygen Uptake rates of experimental aggregates were greatest (112.7 mmol m-2 day-1) with 1% organic loadings in coarse sediment at 20°C. Elevated oxygen flux rates in porous coarse sediments are likely to be a function of increased vertical migration of anaerobically liberated sulphides to the sediment-water interface. However, survival of M. edulis under bacterial mats of Beggiatoa spp. indicates the species’ resilience to sulphides and so we propose that the presence of reactive organic matter within the burial medium may facilitate bacterial growth and increase mortality through pathogenic infection. This may be exacerbated under the stable interstitial conditions in fine sediment and increased bacterial metabolism under high temperatures. Furthermore, increased temperature may impose metabolic demands upon the mussel that cannot be met during burial-induced anaerobiosis. Summary Lack of consideration for the role of organic matter and temperature during sedimentation events may lead to an overestimation of the tolerance of benthic species to smothering from dredged material." @default.
- W2270740282 created "2016-06-24" @default.
- W2270740282 creator A5002293813 @default.
- W2270740282 creator A5052648297 @default.
- W2270740282 creator A5059503585 @default.
- W2270740282 date "2016-01-25" @default.
- W2270740282 modified "2023-09-26" @default.
- W2270740282 title "The Influence of Organic Material and Temperature on the Burial Tolerance of the Blue Mussel, Mytilus edulis: Considerations for the Management of Marine Aggregate Dredging" @default.
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- W2270740282 doi "https://doi.org/10.1371/journal.pone.0147534" @default.
- W2270740282 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4726446" @default.
- W2270740282 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26809153" @default.
- W2270740282 hasPublicationYear "2016" @default.
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