Colonization Patterns and Densities of Zebra Mussel Dreissena in Muddy Offshore Sediments of Western Lake Erie, Canada

Coakley, John P.; Brown, Glenn R.; Ioannou, S. E.; Charlton, Murray N.

doi:10.1007/978-94-011-5552-6_63

Cited by 18 publications

(18 citation statements)

References 3 publications

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“…The same was observed for another invasive mussel Dreissena polymorpha (zebra mussel) in the Great Lakes region in North America, where large clusters were recorded and distributed unequally under the soft sediments at greater depths (CoaKLey et al, 1997).…”

Section: Discussionsupporting

confidence: 73%

Space-time variation of the relative abundance of Limnoperna fortunei in deep zones of São Gonçalo Channel, Rio Grande do Sul, Brazil

Lopes

Vieira

2012

Iheringia, Sér. Zool.

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ABSTRACT. This work describes the spatial-temporal variation of the relative abundance and size of Limnoperna fortunei (Dunker, 1857) collected in São Gonçalo Channel through bottom trawl with a 0.5 cm mesh, at depths between 3 and 6 m. The estimative of mean relative abundance (CPUE) ranged from 2,425.3 individuals per drag (ind./drag) in the spring to 21,715.0 ind./drag in the fall, with an average of 9,515.3 ind./drag throughout the year. The estimated mean density of L. fortunei for the deep region of São Gonçalo Channel ranged from 1.2 to 10.3 ind./ m 2 , and it was recorded a maximum density of 84.9 ind./m 2 in the fall of 2008. The method of sampling using bottom trawl enabled the capture of L. fortunei under the soft muddy bottom of the channel, in different sizes ranging from 0.4 to 3.2 cm. This shows that the structure of the L. fortunei adult population under the bottom of the São Gonçalo Channel is composed mostly of small individuals (<1.4 cm), which represent up to 74% of the population collected.

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Section: Discussionsupporting

confidence: 73%

Space-time variation of the relative abundance of Limnoperna fortunei in deep zones of São Gonçalo Channel, Rio Grande do Sul, Brazil

Lopes

Vieira

2012

Iheringia, Sér. Zool.

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“…and ponar grabs), but negligible densities were observed on the surrounding soft, muddy sediments off the reef (11 m deep). It is important to note that this study was undertaken before the onset of the colonization of soft sediments by zebra mussels (Coakley et al 1997). All of the mussels were identified as Dreissena polymorpha and were present in three size classes (0.3, 1.7, and 2.5 cm long; Fig.…”

Section: Methodsmentioning

confidence: 99%

Benthic‐Pelagic coupling over a zebra mussel reef in western Lake Erie

Ackerman¹,

Loewen²,

Hamblin³

2001

Limnology & Oceanography

139

120

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We conducted a field study including a series of cruises over an isolated offshore zebra mussel reef (7-11 m deep) in Western Lake Erie to examine the effect of zebra mussels (Dreissena spp.) on the water column. The horizontal currents over the reef were found to be primarily due to the hydraulic flow and surface gravitational seiches. The turbulence generated by these currents was found to be too weak to fully mix the water column. Although seasonal stratification was not observed, solar heating during the day and intrusions of cold central basin water caused stable stratification of the water column 60% of the time. Results from the seston analysis taken at five depths showed a statistically significant mussel-feeding signature in chlorophyll a and organic seston concentrations measured within 2 m above the reef. Estimates of clearance rates based on field data were consistent with rates measured in a flow chamber using water from the site, which indicated that zebra mussels could remove up to 40% of the total seston. The detection of a zebra mussel-induced concentration boundary layer is due to: (1) reduced vertical mixing as a result of semidiurnal periodic stratification, (2) refiltration of bottom water in zebra mussel populations, and (3) in situ clearance rates that are lower than those observed in the laboratory. Thus, offshore zebra mussel colonies may have less of an effect on the water column than had been previously estimated by simple stirred reactor models, and the role of zebra mussels in the clarification of Lake Erie should be investigated further.

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“…Sidescan sonar has been successfully employed for the mapping of biogenic reefs, such as mussel beds (Coakley et al, 1997) and coral reefs (Hovland et al, 2002), but this is the first study to provide evidence for its potential for mapping serpulid reefs. Serpulid reef bands or patches have been shown to produce characteristic patterns on mosaicked sonargrams.…”

Section: Discussionmentioning

confidence: 98%

Mapping serpulid worm reefs (Polychaeta: Serpulidae) for conservation management

Moore

Bates

Mair

et al. 2008

Aquatic Conservation

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ABSTRACT1. This study describes investigations into mapping of the biogenic reefs produced by the polychaete worm, Serpula vermicularis, for the purposes of conservation management.2. Reef distribution throughout Loch Creran, Scotland, was mapped using a diver transect technique and was found to be restricted to a peripheral band, with a mean upper limit of distribution of 2.7 m. The mean lower limit was found to decrease with distance from the mouth of the loch, with a lower limit of 9.3 m in the lower basin rising to 6.6 m in the upper basin; the likely influence of a corresponding decrease in the upper depth distribution of muds is discussed.3. Through determination of the mean width of the reef band and coastline length, the areal extent of the reef band was estimated as 108 ha, revealing Loch Creran to harbour the most extensive known development of S. vermicularis reef habitat in the world.4. The utility of sidescan sonar in mapping serpulid reefs was examined in four of the major embayments. Reef material appeared as characteristic patterning on the sonargrams, with the morphology of individual larger reefs being discernible.5. Sidescan sonar was found to be particularly valuable for the identification and monitoring of threats to the conservation of serpulid reefs. Sidescan sonar surveying was found to facilitate identification of loss of habitat extent resulting from anthropogenic activities such as moorings, aquaculture installations and dredging and can also be used to monitor the potentially damaging activity of otter trawling. Further improvements in the mode of deployment of sidescan sonar are discussed.

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Colonization Patterns and Densities of Zebra Mussel Dreissena in Muddy Offshore Sediments of Western Lake Erie, Canada

Cited by 18 publications

References 3 publications

Space-time variation of the relative abundance of Limnoperna fortunei in deep zones of São Gonçalo Channel, Rio Grande do Sul, Brazil

Space-time variation of the relative abundance of Limnoperna fortunei in deep zones of São Gonçalo Channel, Rio Grande do Sul, Brazil

Benthic‐Pelagic coupling over a zebra mussel reef in western Lake Erie

Mapping serpulid worm reefs (Polychaeta: Serpulidae) for conservation management

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