The 'systematic or intentional release of liquids, gases' (from MSFD Annex III Table 2) is considered e.g. in relation to produced water from the oil industry. It should, therefore, be considered in parallel with the other chemical contaminants. Other solid debris such as shellfish shells and seaweed debris may also have detrimental effects which are not covered in other pressures.
Benchmark:
Compliance with all Average Annual Environmental Quality Standards, conformance with Probable Effect levels, Environment Assessment Criteria, Effects Range - Low, and any introduction of other solid debris without EQS that may cause changes to species or habitats.
Examples:
Shellfish shell debris and seaweed debris from aquaculture may fall to seabed around longline equipment during rough weather or harvesting