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Scotland's Marine Assessment 2020
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Introduction
Managing the human activities that have an impact on Scotland’s seas
Climate change
Physical characteristics and ocean acidification
Clean and safe
Healthy and biologically diverse
Productive
Natural capital, ecosystem services and the Blue Economy
Pressures from activities
Regional assessments
Key outcomes from the peer review
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Extraction - Sand & gravel
The extraction of sand and gravel sediments from the seabed for the aggregate industry.
Associated productive assessment:
Aggregates
Associated pressures:
Death or injury by collision above water
Death or injury by collision below water
Emergence regime changes - local
Genetic modification and translocation of indigenous species
Introduction of light or shading
Introduction of microbial pathogens (disease), viruses or parasites
Introduction or spread of non-indigenous species and translocations (competition)
Litter
Physical change (to another seabed type)
Physical removal (extraction of substratum)
Reduction in availability or quality of prey
Removal of non-target species (including lethal)
Siltation rate changes (heavy)
Siltation rate changes (light)
Sub-surface abrasion/penetration
Surface abrasion
Underwater noise
Visual disturbance (behaviour)
Water clarity changes
Water flow (tidal current) changes - local
