Development of macrofaunal communities on dredged material used for mudflat enhancement: a comparison of three beneficial use schemes after one year

Bolam, Stefan G.; Whomersley, Paul

doi:10.1016/j.marpolbul.2004.08.006

Cited by 45 publications

(14 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Since even small differences in the median grain size and the fractions of medium sand and fine sand content are reflected in differences in the nematode communities (Vanaverbeke et al, 2002), it seems unlikely that nematode communities would remain unchanged during such a long period in this very dynamic environment. Bolam et al (2006) summarised earlier discussions (see Bolam and Whomersley, 2003;Bolam and Whomersley, 2005;Schratzberger et al, 2006) on reference sites, defined as pre-impact situations or a non-impacted reference site. Although they studied the recolonisation of dredged material deposited in intertidal systems, their remarks are valid for the central depression as well: pre-impact situations are very different from the impacted situations (eg.…”

Section: Recovery Of Nematode Communitiesmentioning

confidence: 99%

Short-term changes in nematode communities from an abandoned intense sand extraction site on the Kwintebank (Belgian Continental Shelf) two years post-cessation

Vanaverbeke

Vincx

2008

Marine Environmental Research

View full text Add to dashboard Cite

We investigated short-term changes (two years) in nematode communities (density, diversity, biomass and community composition) in an area on the Kwintebank (Belgian Continental Shelf) that was closed for sand extraction activities and compared these patterns to nematode community characteristics from another area on the Kwintebank were sand extraction was still ongoing. Six stations were sampled in 2003 and 2004 and nematode community composition and univariate measures of diversity were compared with values obtained during the extraction period and with a "pre-impact situation" sampled in 1978. Although nematode density, diversity and biomass did not change two years after cessation of the exploitation, nematode community composition did and was more stable than in the extracted site. This is attributed to the absence of continuous disturbances associated with the extraction activities such as the creation and filling up of dredge furrows. As a consequence of the typical life history traits of nematodes, recovery seems to follow different pathways when compared to macrobenthic recovery from the same impact. (C) 2008 Elsevier Ltd. All rights reserved

show abstract

Section: Recovery Of Nematode Communitiesmentioning

confidence: 99%

Short-term changes in nematode communities from an abandoned intense sand extraction site on the Kwintebank (Belgian Continental Shelf) two years post-cessation

Vanaverbeke

Vincx

2008

Marine Environmental Research

View full text Add to dashboard Cite

show abstract

“…Besides natural processes, anthropogenic factors influencing sedimentation are prominent in the estuary, among which dredging in the main channels to ensure access to the port of Antwerp and dumping of the dredged material to retain sediment within the estuary are the most important (Jeuken and Wang, 2010;Meire et al, 2005). Most of this dredged sediment is disposed of near shoals and tidal flats and can thus affect the intertidal ecosystem (Bolam and Whomersley, 2005;De Vriend et al, 2011;Zheng, 2015). The effects of sediment deposition on taxonomic diversity (Thrush et al, 2003), behaviour (Hohaia et al, 2014;Townsend et al, 2014), and ecosystem functioning (Larson and Sundbäck, 2012;Montserrat et al, 2011) have recently received considerable attention.…”

Section: Introductionmentioning

confidence: 99%

Functional trait responses to sediment deposition reduce macrofauna-mediated ecosystem functioning in an estuarine mudflat

et al. 2018

View full text Add to dashboard Cite

Abstract. Human activities, among which dredging and land use change in river basins, are altering estuarine ecosystems. These activities may result in changes in sedimentary processes, affecting biodiversity of sediment macrofauna. As macrofauna controls sediment chemistry and fluxes of energy and matter between water column and sediment, changes in the structure of macrobenthic communities could affect the functioning of an entire ecosystem. We assessed the impact of sediment deposition on intertidal macrobenthic communities and on rates of an important ecosystem function, i.e. sediment community oxygen consumption (SCOC). An experiment was performed with undisturbed sediment samples from the Scheldt river estuary (SW Netherlands). The samples were subjected to four sedimentation regimes: one control and three with a deposited sediment layer of 1, 2 or 5 cm. Oxygen consumption was measured during incubation at ambient temperature. Luminophores applied at the surface, and a seawater-bromide mixture, served as tracers for bioturbation and bio-irrigation, respectively. After incubation, the macrofauna was extracted, identified, and counted and then classified into functional groups based on motility and sediment reworking capacity. Total macrofaunal densities dropped already under the thinnest deposits. The most affected fauna were surficial and low-motility animals, occurring at high densities in the control. Their mortality resulted in a drop in SCOC, which decreased steadily with increasing deposit thickness, while bio-irrigation and bioturbation activity showed increases in the lower sediment deposition regimes but decreases in the more extreme treatments. The initial increased activity likely counteracted the effects of the drop in low-motility, surficial fauna densities, resulting in a steady rather than sudden fall in oxygen consumption. We conclude that the functional identity in terms of motility and sediment reworking can be crucial in our understanding of the regulation of ecosystem functioning and the impact of habitat alterations such as sediment deposition.

show abstract

“…The reason for use of these sandy media is their possible application for the establishment of clam fishery area. As for DS, it may be used as an additive to adjust the silt and clay content in practical use, because DS mainly consists of silt and clay (van Dolah et al, 1984;Bolam and Whomersley, 2005).…”

Section: Introductionmentioning

confidence: 99%

Effect of Silt and Clay on the Settlement of Short-necked Clam Ruditapes philippinarum Larvae

Nakai

Ishii

Okuda

et al. 2012

J. of Wat. & Envir. Tech.

View full text Add to dashboard Cite

In this study, we investigated the effect of silt and clay in the sediment on the settlement of Ruditapes philippinarum larvae. Mountain, river and sea sands of which silt and clay (< 0.075 mm) content was adjusted using silt and clay originating from these sands or dredged sediment (DS) were examined for settlement of R. philippinarum larvae. The addition of DS and Otagawa river sand-originated silt and clay did not accelerate the larval settlement, whereas the mountain and Jigozen sea sands-originated silt and clay promoted larval settlement at 5%. The negative impact of Otagawa river sand-originated silt and clay might be due to its high leachability of Mn, while the accelerated larval settlement by Jigozen sea sands-originated silt and clay could be attributed to its organic contents. The provided results indicate that a suitable ratio of the fine particles to coarse particles exists for the acceleration of the larval settlement, though the effect might be dependent on their chemical properties.Keywords: larval settlement, restoration, Ruditapes philippinarum, silt and clay, tidal flat INTRODUCTION Short-necked clam (Ruditapes philippinarum) resources in Japan have been decreasing for decades. To maintain the clam production, cultivated young short-necked clams have been transplanted to clam fishery areas. As for the causes of decrease in short-necked clam resources, deterioration of the sediment environment and decrease in number of their larvae in seawater were reported (Ishii et al., 2001;Sekiguchi and Ishii, 2003). Therefore, restoration of the sediment environment is an important task to reestablish clam habitats for the natural recovery of short-necked clam resources.

show abstract

Development of macrofaunal communities on dredged material used for mudflat enhancement: a comparison of three beneficial use schemes after one year

Cited by 45 publications

References 24 publications

Short-term changes in nematode communities from an abandoned intense sand extraction site on the Kwintebank (Belgian Continental Shelf) two years post-cessation

Short-term changes in nematode communities from an abandoned intense sand extraction site on the Kwintebank (Belgian Continental Shelf) two years post-cessation

Functional trait responses to sediment deposition reduce macrofauna-mediated ecosystem functioning in an estuarine mudflat

Effect of Silt and Clay on the Settlement of Short-necked Clam Ruditapes philippinarum Larvae

Contact Info

Product

Resources

About