| Category | Impact |
| ||
| Biodiversity | Abundance | Negative impacts | Indirect benefits | |
| Benthic habitats and benthos | Increase | Increase of hard substrate habitats | Partial loss of soft sediment habitats | Habitats not damaged by trawling |
| Epifouling benthos | Increase | Increase | Potential introduction of invasive species | - |
| Fish | Increase | Increase | No indications | Reduced fishing pressure |
| Porpoises | - | Not established | Not established | Reduced bycatch risk |
| Seals | - | Increase | No indications | Reduced bycatch risk |
| Seabirds | Decrease | Decrease of some species, increase of others | Potential habitat loss and collision risk | Not established |
| Migrating birds | - | - | Possible barrier effect | - |