| 1,2 |
Collie et al. 1997, 2000 |
Northern edge, eastern Georges
Bank, U.S. and
Canada |
42-90 m |
Pebble-cobble “pavement” with some overlying sand |
S
higher total densities, biomass, and species diversity in undisturbed sites,
but also in deeper water (i.e.,
effects of fishing could not be distinguished from depth effects); 6 species
abundant at U sites, rare or absent at D sites; percent cover of tube-dwelling
polychaetes, hydroids, and bryozoans S higher in deepwater, but no
disturbance effect. |
|
Benthic
sampling, video, and still photos in 2 shallow (42-47 m) and 4 deep (80-90 m) sites disturbed (D) and
undisturbed (U) by trawls and scallop dredges. |