Benthic-pelagic coupling over a zebra mussel reef in western Lake Erie
TLDR
This article 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.Abstract:
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.read more
Citations
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Journal ArticleDOI
The nearshore phosphorus shunt: a consequence of ecosystem engineering by dreissenids in the Laurentian Great Lakes
Robert E. Hecky,R Eh Smith,David R. Barton,Stephanie J. Guildford,William D. Taylor,Murray N. Charlton,Todd Howell +6 more
TL;DR: In this paper, a conceptual model, the nearshore shunt, seeks to describe a fundamental redirection of nutrient and energy flow consequent to dreissenid establishment.
Journal ArticleDOI
Small-scale hydrodynamics in lakes
Alfred Wüest,Andreas Lorke +1 more
TL;DR: In this article, small-scale turbulence observations allow the mixing regimes in lakes, reservoirs, and other enclosed basins to be categorized into the turbulent surface and bottom boundary layers as well as the comparably quiet interior.
Journal ArticleDOI
Spatial flow and sedimentation patterns within patches of epibenthic structures: Combining field, flume and modelling experiments
Tjeerd J. Bouma,L.A. van Duren,Stijn Temmerman,Thomas Claverie,A. Blanco-Garcia,T.J. Ysebaert,Peter M. J. Herman +6 more
TL;DR: In this article, the authors used a 3D hydrodynamic model to simulate the long-term sediment dynamics in the field and found that sedimentation was much larger in the high-density patches than the low-density ones.
Journal ArticleDOI
Dreissena and the disappearance of the spring phytoplankton bloom in Lake Michigan
Henry A. Vanderploeg,James R. Liebig,Thomas F. Nalepa,Thomas F. Nalepa,Gary L. Fahnenstiel,Gary L. Fahnenstiel,Steven A. Pothoven,Steven A. Pothoven +7 more
TL;DR: The hypothesis of a mid- depth carbon (C) and phosphorous (P) sink caused by mussel uptake of seston-associated C and P that affected not only the mid-depth region, but also the offshore region “downstream” of theMid-depth zone is proposed.
Journal ArticleDOI
Context-dependent effects of freshwater mussels on stream benthic communities
TL;DR: Differences between living and sham mussel treatments indicate that biological activities of mussels provide ecosystem services to the benthic community beyond the physical habitat provided by shells alone, and demonstrates that freshwater mussels can strongly influence the co-occurring benthics community, but that effects of mussel are context-dependent and may vary among species.
References
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