Effects of suspended mussel culture (Mytilus spp.) on sedimentation, benthic respiration and sediment nutrient dynamics in a coastal bay

Hatcher, A.; Grant, Jon E.; Schofield, B.

doi:10.3354/meps115219

Cited by 188 publications

(123 citation statements)

References 18 publications

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“…Additional research has indicated that TOC appears to be toxic to benthic fauna at concentrations over 35 mg g -1 due to the deoxygenating effect of organic matter, whereas benthic assemblages do not show any evident alterations at TOC concentrations below 10 mg g -1 (Hyland et al, 2005). Most forms of bivalve shellfish culture contribute to Figures in parentheses are the % significance levels in a permutation test for the absence of seriation Hydrobiologia enhanced sedimentation of organic material in the proximity of the mariculture units (Dahlbäck & Gunnarsson, 1981;Hatcher et al, 1994;Grant et al, 1995), and in one study, suspended scallop culture increased the deposition of organic matter to approximately 2.46 times compared to the rate of a reference site without scallop culture (Zhou et al, 2006). However, in our study, the organic matter did not differ along the distance gradient, with an average of 17.27 ± 6.05 mg g -1 (TOC percentage of weight) lower than the threshold of danger to benthic assemblages.…”

Section: Discussionmentioning

confidence: 99%

Effects of intensive scallop mariculture on macrobenthic assemblages in Sishili Bay, the northern Yellow Sea of China

et al. 2013

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To elucidate the effects of scallop mariculture on the macrobenthic community in a moderate energy system, bimonthly samples from four transects along a distance gradient in Sishili Bay, the northern Yellow Sea of China, were investigated. Differences in macrobenthic community structure along the distance gradient were evaluated using univariate and multivariate analyses. The AZTI's Marine Biotic Index (AMBI) and multivariate-AMBI analyses indicated that the macrobenthic community suffered little disturbance from the scallop culture. Consistently, the results of two-way analysis of similarities demonstrated that macrobenthic communities showed no difference along the distance gradient, but were significantly affected by the sampling months and transects. This conclusion was also confirmed by other univariate and multivariate analyses. The concentration of total organic carbon was 17.27 ± 6.05 mg g -1 , which is below the dangerous threshold of 35 mg g -1 toxic to benthic fauna. Combined results revealed that no detectable effects on the macrobenthic community were caused by intensive and long-term scallop culture in this moderate energy system. This is likely due to the influence of local hydrodynamics and it is recommended that intensive scallop farming be located in areas with strong tidal or current flows.

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Section: Discussionmentioning

confidence: 99%

Effects of intensive scallop mariculture on macrobenthic assemblages in Sishili Bay, the northern Yellow Sea of China

et al. 2013

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“…In several countries, nutrient-laden discharges from aquaculture, agriculture, forestry or sewage have resulted in serious eutrophication-induced oxygen depletion of the water and a high ammonia release from the sediment (Schaubs & Gieskes 1991), both of which have adverse affects on shallow water benthic fauna1 species (Kristensen 1984, Brockmann et al 1988, Parker 1988, Costello et al 1993, Hatcher et al 1994). …”

Section: Introductionmentioning

confidence: 99%

Fluxes of haemolymph ammonia and free amino acids in Mytilus edulis exposed to ammonia

Sadok¹,

Uglow²,

Haswell³

1995

Mar. Ecol. Prog. Ser.

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Survival, weight-specific ammonia fluxes, blood ammonia levels and pH values were measured in individual mussels Mytilus edulls (L.) (n = 6 in each group) sampled after various acute exposures (max. 2 h) in normal or ammonia-enriched seawater Ammonia influxes occurred when external ammonia was 2100 pm01 I-' when, within 5 min, mean blood ammonia levels increased significantly by an amount directly proportional to the medium ammonia concentration. Blood pH showed an initial alkalosls followed by a slow acidosis. Blood ninhydnn-positive substance (NPS) levels showed a less rapid medium-NH4 concentration-dependent elevation and only the 100 inmol l-'-treated mussels showed a signlf~cant increase in blood NPS after 5 min exposure. Wlth~n the 2 h test period, no mortalities occurred in any group, though 50% of the 100 mm01 l-'-treated group subsequently died after 6 h exposure. Apart from those in the most concentrated test medium, all mussels were seen to use apparently normal pumping behaviour, and it was concluded that M. edulis is an ammonia-tolerant species, capable of tolerating very high blood ammonia levels for extended periods of time. The toxic effect may be related more to the rate at which ammonia influx occurs, with the attendant level of disruption to the regulation of blood NPS levels, rather than to the actual blood ammonia concentration attained.

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“…Coen et al, 2007;Hatcher et al, 1994;Newell et al, 2005) by consuming seston from the water column and depositing feces and pseudofeces on the sediment surface, thus causing an organic enrichment of the surrounding sediments Krone et al, 2013) especially by increasing the total dissolved nitrogen (Hatcher et al, 1994). These changes in sediment chemistry can affect benthic communities by increasing or decreasing individual species abundances (Dauer et al, 2000) or by changing entire species compositions (Kaspar et al, 1985).…”

Section: Tablementioning

confidence: 99%

Artificial structures in sediment-dominated estuaries and their possible influences on the ecosystem

Wetzel

Scholle

Teschke

2014

Marine Environmental Research

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a b s t r a c tArtificial substrates are omnipresent today in most estuaries mostly in form of massive rip-rap used for groynes and jetties. In the Weser estuary, Germany, 60% of the shoreline is covered with such artificial substrates while, natural rocky substrate is lacking, as in all Wadden Sea estuaries. This large quantity of artificial substrates may be colonized by a benthic hard-substrate community which differs from the local natural soft-substrate assemblage. In this study we examined species compositions, abundances, biomass, and numbers of species of subtidal benthic communities on groynes and in the natural habitat, the sediment, along the salinity gradient of the Weser estuary. Species composition changed on both substrates significantly with salinity and was also significantly different between the substrates. In a comparison with the sediment, the groynes did not provide any benefit for non-indigenous nor for endangered species in terms of abundance, biomass, and number of species, but represent habitats with higher total abundances and biomass; though some non-indigenous species even occurred exclusively on groynes. In particular, groynes supported filter-feeding organisms which play an important role by linking benthic and pelagic food webs. The dominance of the suspension feeders affects crucial estuarine ecosystem services and may have important implications for the estuarine management by altering the estuarine ecological quality status. Hence, artificial substrates should be considered in future conservation planning and in ecological quality monitoring of the benthic fauna according to the European Water Framework Directive.

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Effects of suspended mussel culture (Mytilus spp.) on sedimentation, benthic respiration and sediment nutrient dynamics in a coastal bay

Cited by 188 publications

References 18 publications

Effects of intensive scallop mariculture on macrobenthic assemblages in Sishili Bay, the northern Yellow Sea of China

Effects of intensive scallop mariculture on macrobenthic assemblages in Sishili Bay, the northern Yellow Sea of China

Fluxes of haemolymph ammonia and free amino acids in Mytilus edulis exposed to ammonia

Artificial structures in sediment-dominated estuaries and their possible influences on the ecosystem

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