Effects of exposure and previous exposure to copper on growth of veliger larvae and survivorship of Mytilus edulis juveniles

Hoare, K.; Davenport, John; Beaumont, AR

doi:10.3354/meps120163

Cited by 28 publications

(9 citation statements)

References 18 publications

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“…The present study confirms sensitivity of clam larvae to heavy metals as shown by Manahan and Crisp (1982), and can be easily used for field monitoring of water and sediment quality. Many other works showed that heavy metals caused failure in metamorphosis (Beiras and His, 1994;Hoare et al, 1995); this was not shown in our study, where metamorphosis success was not affected but survival was reduced at the end of this step at the Mahres, Zarat, and Monastir stations. However, the use of larvae for bioassay is problematic because sensitivity is age-dependent (Beiras and His, 1994).…”

Section: Discussioncontrasting

confidence: 90%

Sediment Toxicity Bioassays UsingRuditapes decussatusEmbryos and Larvae to Assess the Contamination in Four Sites on the Coast of Tunisia

Fathallah

Medhioub

et al. 2012

Soil and Sediment Contamination: An International Journal

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Section: Discussioncontrasting

confidence: 90%

Sediment Toxicity Bioassays UsingRuditapes decussatusEmbryos and Larvae to Assess the Contamination in Four Sites on the Coast of Tunisia

Fathallah

Medhioub

et al. 2012

Soil and Sediment Contamination: An International Journal

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“…In our analyses, there was no evidence that pollution influenced mussel population structure. This is perhaps surprising, given evidence of severe effects of some pollutants on mussel larvae (Hoare, Beaumont & Davenport 1995; Hoare, Davenport & Beaumont 1995). Nevertheless, the current evidence suggests that the relationship between SFG and community structure is probably driven by direct effects of pollution on the organisms associated with the mussels rather than by indirect effects mediated by changes in the habitat provided by the mussels.…”

Section: Discussionmentioning

confidence: 99%

Measurements of sublethal effects on individual organisms indicate community‐level impacts of pollution

Crowe

Smith

Донкин

et al. 2004

Journal of Applied Ecology

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Summary1. Due to the cost and complexity of sampling biological communities, surrogate biological measures or concentrations of toxic contaminants are often used to indicate environmental impacts. Such indicators can be powerful tools, but their effectiveness requires evaluation. Mussels are widely used as bioindicators of environmental contamination. For example, physiological measurements on live mussels form the basis of scope for growth (SFG), an integrated indicator of environmental stress. However, the effectiveness of SFG as an indicator of community level effects has rarely been tested in the field. 2. In this study of six sites on the west coast of the UK, the diversity of macrofaunal communities associated with mussels was reduced at sites with low SFG (< 10 J g) compared with those with high SFG (> 15 J g − 1 h − 1 ). At smaller scales, variation in community structure was related to biomass of mussels, mass of coarse sediments and the fractal dimension of the surface of the mussel bed. 3. We measured hydrocarbon contamination as a first step in identifying contaminants that might underpin the relationship between SFG and diversity. Unresolved complex mixtures (UCM) are often the most abundant hydrocarbon contaminants in the environment, but have, until recently, been largely ignored. We found generally good accordance between UCM concentration in mussel tissues, SFG and diversity, but other pollutants are also likely to be involved. 4. Synthesis and applications. Our findings illustrate the complexity of relating changes in diversity to synoptic or sublethal measures of environmental stress in the field. However, the results represent a significant step towards a biotic indicator of environmental quality that integrates impacts across a range of levels of biological organization (from intraindividual to community). Such indicators may be of particular value in the implementation of the European Union Water Framework Directive in Europe and similar environmental legislation elsewhere.

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“…Cu reduced the growth of colonies in both seasons, but more dramatically in winter and only on 2 of 3 panels at 1 site in summer. Hoare et al (1995) suggested that the exposure to Cu could alter the larval physiology, reducing the lipid reserve that is essential for larval metamorphosis and growth. While reduced lipid reserves might account for smaller ancestrulae, it is surprising that such effects persist through several cycles of budding, when budding is fuelled by feeding of many zooids.…”

Section: Discussionmentioning

confidence: 99%

Delayed effects of larval exposure to Cu in the bryozoan Watersipora subtorquata

Ng¹,

Keough²

2003

Mar. Ecol. Prog. Ser.

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Larval experience affects early post-metamorphic performance of a range of marine invertebrates, and even brief events during the larval stage can be important. One of the important larval stresses for organisms living in urban coastal environments is exposure to toxicants. Larvae may pass through patches of toxicants in their dispersal stage with the potential to affect their postmetamorphic performance. However, most studies on embryonic or larval tolerance to pollutants end at, or before, metamorphosis, have little follow-up and almost all are done under laboratory conditions. In this study, we tested whether short-term larval exposure to copper has short-and long-term carry-over effects in the encrusting bryozoan Watersipora subtorquata by following settlement and metamorphosis in the laboratory, then transplanting colonies into the field, in 2 seasons and at 2 sites in SE Australia. Cu at 100 µg l -1 accelerated larval attachment in winter and summer, but inhibited metamorphosis. When transplanted to the field, juveniles survived and grew well, and effects on survival and growth did not appear until several weeks or months after settlement. Larval exposure to Cu reduced survival of colonies to about 2/3 that of control colonies in summer and at 1 site, reduced survival to about 20% that of controls in winter. The fall in survivorship occurred abruptly after 3 to 5 wk in summer and 14 wk in winter. The surviving colonies grew more slowly than the controls. In general, there was little temporal variation in Cu effects, but there was spatial variation in effects on survival and growth of colonies within and between sites.KEY WORDS: Cu · Carry-over effects · Attachment · Metamorphosis · Post-metamorphic survival · Post-metamorphic growth · Spatial variations · Temporal variations · Bryozoan Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 257: [77][78][79][80][81][82][83][84][85] 2003 competitive ability, time to reach reproductive maturity or fecundity. However, so far, laboratory studies on embryonic or larval tolerance to pollutants end at, or before, metamorphosis, have little follow-up and most are done under laboratory conditions. Even when carry-over effects of prolonged swimming or larval nutrition have been examined, they have generally not extended very far beyond the completion of metamorphosis, leaving open the possibility that some effects may only become apparent after a considerable time.In a previous study, we found there were impacts of brief larval exposure to Cu on performance of the arborescent bryozoan Bugula neritina (T. Y.-T. Ng & M. J. Keough unpubl. data). Larval photopositive behaviour was affected and the metamorphosis was delayed or inhibited. Post-metamorphic survival and growth of the colonies were reduced, although the actual combination of effects varied between different sites. Here, we extend this approach to another bryozoan and test whether brief larval stresses have effects on attachment and metamorphosis of larvae ...

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Effects of exposure and previous exposure to copper on growth of veliger larvae and survivorship of Mytilus edulis juveniles

Cited by 28 publications

References 18 publications

Sediment Toxicity Bioassays UsingRuditapes decussatusEmbryos and Larvae to Assess the Contamination in Four Sites on the Coast of Tunisia

Sediment Toxicity Bioassays UsingRuditapes decussatusEmbryos and Larvae to Assess the Contamination in Four Sites on the Coast of Tunisia

Measurements of sublethal effects on individual organisms indicate community‐level impacts of pollution

Delayed effects of larval exposure to Cu in the bryozoan Watersipora subtorquata

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