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Environmental effects of marine fishing
1Some effects of fisheries on the associated biological systems are reviewed and management options and their inherent risks are considered. 2In addition to the effects on target species, other…
Disturbance to Marine Benthic Habitats by Trawling and Dredging: Implications for Marine Biodiversity
▪ Abstract The direct effects of marine habitat disturbance by commercial fishing have been well documented. However, the potential ramifications to the ecological function of seafloor communities…
Muddy waters: elevating sediment input to coastal and estuarine habitats
Changes in land use and the development of coastal regions around the world have markedly increased rates of sediment input into estuarine and coastal habitats. Field studies looking at the…
Bioturbators enhance ecosystem function through complex biogeochemical interactions
Experimental field measurements demonstrate how the abundance of spatangoid urchins—infaunal (in seafloor sediment) grazers / deposit feeders—is positively related to primary production, as their activities change nutrient fluxes and improve conditions for production by microphytobenthos (sedimentatry microbes and unicellular algae).
Fishing impacts and the degradation or loss of habitat structure
The wider effects of fishing on marine ecosystems have become the focus of growing concern among scientists, fisheries managers and the fishing industry. The present review examines the role of…
Habitat change in estuaries: predicting broad-scale responses of intertidal macrofauna to sediment mud content
- S. Thrush, J. Hewitt, A. Norkko, P. Nicholls, G. Funnell, J. Ellis
- Environmental Science
- 28 November 2003
This study details a novel strategy that enabled it to rapidly collect data on macrofaunal densities and sediment characteristics by sampling mud-to-sand transition zones in 19 estuaries.
DISTURBANCE OF THE MARINE BENTHIC HABITAT BY COMMERCIAL FISHING: IMPACTS AT THE SCALE OF THE FISHERY
Commercial fishing is one of the most important human impacts on the marine benthic environment. One such impact is through disturbance to benthic habitats as fishing gear (trawls and dredges) are…
Scale-Dependent Recolonization: The Role of Sediment Stability in a Dynamic Sandflat Habitat
- S. Thrush, R. Whitlatch, R. Pridmore, J. Hewitt, V. Cummings, M. R. Wilkinson
- Environmental Science
- 1 December 1996
The results demonstrate the need for caution in scaling-up from small-scale studies, and indicate that larger scale disturbances that destroy organisms with a role in maintaining habitat stability are likely to result in very slow recovery dynamics, particularly in wave-disturbed soft-sediment habitats.
The impact of habitat disturbance by scallop dredging on marine benthic communities:what can be predicted from the results of experiments?
The density of common macrofaunal populations at each site decreased as a result of dredging, with some populations still significantly different from the adjacent reference plot after 3 mo, which is considered a conservative assessment of bottom disturbance by fishing.
Seagrass patches and landscapes: The influence of wind-wave dynamics and hierarchical arrangements of spatial structure on macrofaunal seagrass communities
The spatial arrangement of seagrass beds varies from scales of centimeters to meters (rhizomes, shoot groups), meters to tens of meters (patches), to tens of meters to kilometers (seagrass…