Vertical migration and mortality of benthos in dredged material—part I: Mollusca

Maurer, Don; Keck, Richard T.; Tinsman, Jeff C.; Leathem, Wayne

doi:10.1016/0141-1136(81)90043-x

Cited by 70 publications

(39 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The % variance explained by each axis is also given well documented that mortality following deposition increases with sediment silt-clay content (e.g. Kranz 1974, Maurer et al 1981a,b, Turk & Risk 1981, Chandrasekara & Frid 1998; and (2) our more recent experiments have demonstrated much higher recolonisation of defaunated marine sediment additions than of terrestrial sediment additions (R. Whitlatch & V. Cummings unpubl. data).…”

Section: Recovery Of Sediments and Macrofaunamentioning

confidence: 59%

Terrestrial deposits on intertidal sandflats: sediment characteristics as indicators of habitat suitability for recolonising macrofauna

Cummings¹,

Thrush²,

Hewitt³

et al. 2003

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Section: Recovery Of Sediments and Macrofaunamentioning

confidence: 59%

Terrestrial deposits on intertidal sandflats: sediment characteristics as indicators of habitat suitability for recolonising macrofauna

Cummings¹,

Thrush²,

Hewitt³

et al. 2003

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

“…The bivalves Nucula nitidosa and Corbula gibba both declined in abundance relative to the reference area (Maurer et al 1981) and are also sensitive to the high rates of sedimentation (Howell & Shelton 1970) Multivariate analysis of the community data showed that the 2 sites became significantly different after only 5 mo of disturbance, remaining so throughout the experiment. An increase in abundance of opportunistic species was mainly responsible for the differences in the communities.…”

Section: Species Rank Species Rankmentioning

confidence: 99%

Effects of physical trawling disturbance in a previously unfished sheltered Scottish sea loch

Tuck¹,

Hall²,

Robertson³

et al. 1998

Mar. Ecol. Prog. Ser.

169

View full text Add to dashboard Cite

The effects of trawling disturbance on a benthic community were investigated with a manipulative field experiment in a fine muddy habitat that has been closed to fishing for over 25 yr. We examined the effects of extensive and repeated experimental trawl disturbance over an 18 mo period on benthic community structure and also followed the subsequent patterns of recovery over a further 18 mo During the penod of trawl disturbance the number of species and individuals increased and measures of diversity (Shannon's exponential H' and S~rnpson's reciprocal D) and evenness decreased in the trawled area relative to the reference site. The cirratulid polychaetes Chaetozone setosa and Caulleriella zetlandica were found to be most resistant to disturbance. whilst the bivalve Nucula nitidosa and polychaetes Scolopolos armiger and Nephtys cirrosa were identified as sensitive species. Multivariate analysis and abundance biomass comparison plots confirmed that community changes occurred following disturbance. with some differences between treatment and reference sites still apparent after 18 mo of recovery. Physical effects, examined with Side-scan and RoxAnn, were identifiable immediately after disturbance, but were almost indistinguishable after 18 mo of recovery. Such long recovery times suggest that even fishing during a restricted period of the year may be sufficient to maintain communities occupying fine muddy sediment habitats in an altered state.

show abstract

“…Another process may rise by formation of hummocks, a sedimentary pattern of undredged material that is commonly found after the passage of suction dredges (McCauley et al, 1977;Grave & Whitaker, 1999), as those used in the dredging operations analyzed here. This sedimentary feature presents high biological significance in the repopulation process due to residual alive organisms on the hummock itself or immigration of individuals from undisturbed areas to dredged ones (McCauley et al, 1977;Maurer et al, 1981). Recolonization by larval establishment could also have been occurred (Lu & Wu, 2000) but at a slower rate given the large area affected (Hall et al, 1994;Guerra-García & García-Gómez, 2006) and the seasonal availability of recruits (Zajac & Whitlatch, 1982), especially in both winter seasons when the dredging operations started.…”

Section: Discussionmentioning

confidence: 99%

Temporal dynamics of deep infralittoral macrobenthic fauna in a subtropical estuarine environment

Pinotti¹,

Colling²,

Bemvenuti³

2011

Braz. J. Aquat. Sci. Technol.

View full text Add to dashboard Cite

). In order to keep the Patos Lagoon main access channel at constant navigable depths, the Rio Grande Harbour Superintendence periodically executes maintenance dredging operations on this infralittoral area, but our multivariate analyses evidenced no significant difference between dredged and non-dredged sites regardless the year. Among the abiotic parameters analyzed here (temperature, percentage of fine sediments and salinity), the later was evidenced to be highly correlated to the biological data. Reductions in density and/or changes in the species composition could both be attributed to a natural macrobenthic response related to environmental variations. Along the year 2000 high salinity values decreased constantly through seasons to almost limnetic condition in spring, reducing diversity and abundance of marine species and densities of the dominant gastropod species Heleobia australis. On the other hand, salinity values along the year 2006 revealed the maintenance of brackish waters throughout seasons, favoring the input and survival of marine species from coastal adjacent areas inside the estuary, raising its macrobenthic diversity mainly by mollusks and polychaete worms.

show abstract

Vertical migration and mortality of benthos in dredged material—part I: Mollusca

Cited by 70 publications

References 8 publications

Terrestrial deposits on intertidal sandflats: sediment characteristics as indicators of habitat suitability for recolonising macrofauna

Terrestrial deposits on intertidal sandflats: sediment characteristics as indicators of habitat suitability for recolonising macrofauna

Effects of physical trawling disturbance in a previously unfished sheltered Scottish sea loch

Temporal dynamics of deep infralittoral macrobenthic fauna in a subtropical estuarine environment

Contact Info

Product

Resources

About