All classes

• Pressure classes
  • Abrasion
  • Changes in siltation
  • Inputs of fertilisers and other nitrogen — and phosphorus-rich substances
  • Inputs of organic matter
  • Introduction of microbial pathogens
  • Introduction of non-indigenous species and translocations
  • Introduction of non-synthetic substances and compounds
  • Introduction of other substances
  • Introduction of radio-nuclides
  • Introduction of synthetic compounds
  • Marine litter
  • Sealing
  • Selective extraction
  • Selective extraction of species, including incidental non-target catches
  • Significant changes in currents
  • Significant changes in salinity regime
  • Significant changes in thermal regime
  • Smothering
  • Smothering and sealing
  • Underwater noise

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