Skimming flow induced over a simulated polychaete tube lawn at low population densities

Friedrichs, Michael; Graf, Gerhard; Springer, Barbara

doi:10.3354/meps192219

Cited by 109 publications

(121 citation statements)

References 24 publications

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“…Relationship between the total percentage of Mya arenaria and Gemma gemma eroded into traps and the total weight of sediment eroded (summed over the 4 shear velocities) in the flume experiment for cores from 4 sites in the Navesink River most likely due to armouring of the sediment surface by mats of tubes created by the amphipod Ampelisca abdita. Polychaete worm tubes have often been noted to stabilize sediment (Fager 1964, Luckenbach 1986, Thrush et al 1996, although they can also have destabilizing effects at low densities (Eckman et al 1981, Friedrichs et al 2000. A. abdita tubes are flattened and flexible and may have effects more similar to macroalgae.…”

Section: Sediment Erosionmentioning

confidence: 99%

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Effects of sediment source and flow regime on clam and sediment transport

Hunt¹

2005

Mar. Ecol. Prog. Ser.

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Erosion and transport of juvenile benthic invertebrates, including bivalves, has the potential to alter patterns of distribution and abundance during the early postsettlement period. Field observations indicate that there is often great spatial variability in rates of transport of juvenile bivalves. Differences in transport among sites may arise from both physical and biological causes, including variation in water flow, sediment grain size, and the local biological community. In this study, an experiment was conducted in a laboratory flume to examine the effect of sediment source (4 subtidal sites in the Navesink River estuary, New Jersey, USA) and flow velocity on rates of transport of juvenile Mya arenaria and Gemma gemma. Rates of erosion of M. arenaria were significantly related to sediment volume eroded, suggesting that dispersal at high flow speeds is linked to bedload transport. Sediment erosion and clam transport was lower for sediment cores from the 2 sites where the sediment was covered by a mat of amphipod Ampelisca abdita tubes. Reduction of the tube mat resulted in a small but significant increase in sediment erosion. The results of this study and comparison of shear velocities between the laboratory and the field suggest that both the presence of an amphipod mat and low shear velocities will result in low rates of transport of sediment and juvenile clams in the field.

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Section: Sediment Erosionmentioning

confidence: 99%

“…For example, tubes created by polychaetes can have either a stabilizing (e.g. Luckenbach 1986, Thrush et al 1996 or destabilizing effect (Eckman et al 1981), depending on tube density (Jumars & Nowell 1984a, Friedrichs et al 2000.…”

Section: Introductionmentioning

confidence: 99%

Effects of sediment source and flow regime on clam and sediment transport

Hunt¹

2005

Mar. Ecol. Prog. Ser.

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“…A similar complex is dominated by the paddock Barnea parva and other boring bivalves. Polychaete tubes exert profound effects on near-bed flow, which above a certain threshold abundance lead to sediment stabilization where passive deposition of larvae or juveniles is enhanced (Eckman, 1983;Friedrichs et al, 2000). Piddock burrows increase habitat complexity and provide a variety of microhabitats for other species, thereby increasing local assemblage diversity (Pinn et al, 2008).…”

Section: Communities On Soft Circalittoral Rock (Eunis A423)mentioning

confidence: 99%

Assessment of goods and services, vulnerability, and conservation status of European seabed biotopes: a stepping stone towards ecosystem-based marine spatial management

et al. 2012

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The goal of ecosystem-based marine spatial management is to maintain marine ecosystems in a healthy, productive and resilient condition; hence, they can sustainably provide the needed goods and services for human welfare. However, the increasing pressures upon the marine realm threaten marine ecosystems, especially seabed biotopes, and thus a well-planned approach of managing use of marine space is essential to achieve sustainability. The relative value of seabed biotopes, evaluated on the basis of goods and services, is an important starting point for the spatial management of marine areas. Herein, 56 types of European seabed biotopes and their related goods, services, sensitivity issues, and conservation status were compiled, the latter referring to management and protection tools which currently apply for these biotopes at European or international level. Fishing activities, especially by benthic trawls, and marine pollution are the main threats to European seabed biotopes. Increased seawater turbidity, dredged sediment disposal, coastal constructions, biological invasions, mining, extraction of raw materials, shipping-related activities, tourism, hydrocarbon exploration, and even some practices of scientific research, also exert substantial pressure. Although some first steps have been taken to protect the European sea beds through international agreements and European and national legislation, a finer scale of classification and assessment of marine biotopes is considered crucial in shaping sound priorities and management guidelines towards the effective conservation and sustainability of European marine resources.

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“…The modeled flow deceleration of 56% corresponds well with measured reduction of flow velocity of around 60% (Friedrichs 1997). The second case consists of a more recent flume experiment (Friedrichs et al 2000), with a free stream velocity of 0.05 m s −1 , a variation in the abundance of 490 to 3,836 individuals m −2 and a tube height of 3.5 cm. Due to the fact that the height of the bottom boundary layer (~3 cm) was comparable to the height of the tubes, Friedrichs et al (2000) discuss that the results may vary with different experimental settings, but that the results are qualitatively correct.…”

Section: Tube-building Worm-l Conchilegamentioning

confidence: 99%

“…The second case consists of a more recent flume experiment (Friedrichs et al 2000), with a free stream velocity of 0.05 m s −1 , a variation in the abundance of 490 to 3,836 individuals m −2 and a tube height of 3.5 cm. Due to the fact that the height of the bottom boundary layer (~3 cm) was comparable to the height of the tubes, Friedrichs et al (2000) discuss that the results may vary with different experimental settings, but that the results are qualitatively correct. Nevertheless, the reduction in the near-bottom flow velocity modeled with a tube height of 10 cm and a free stream velocity of 0.05 m s −1 shows comparable results with the measured flow deceleration in the flume (Fig.…”

Section: Tube-building Worm-l Conchilegamentioning

confidence: 99%

On the parameterization of biological influences on offshore sand wave dynamics

et al. 2009

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The bed of the North Sea is covered by sand waves and houses a great number of macrobenthic animals. These bio-engineers are known to have a significant influence on the stability of the bed and thereby on the geomorphology of the seabed. This paper proposes a parameterization of these bio-geomorphological interactions. Given the abundance of three dominant bio-engineers on the Dutch Continental Shelf, the predicted occurrence of sand waves, in which the parameterization is included, shows significantly better results, compared to the prediction for the default case without biology. Therefore, the inclusion of biological activity could be important to predict the occurrence of sand waves.

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Skimming flow induced over a simulated polychaete tube lawn at low population densities

Cited by 109 publications

References 24 publications

Effects of sediment source and flow regime on clam and sediment transport

Effects of sediment source and flow regime on clam and sediment transport

Assessment of goods and services, vulnerability, and conservation status of European seabed biotopes: a stepping stone towards ecosystem-based marine spatial management

On the parameterization of biological influences on offshore sand wave dynamics

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