Rationale: State of the bottom substrate defines he quality of the benthic community life as well as the levels of pollutants such as heavy metals, oil etc. which are important in the planning of environmental research and security measures to ensure the safety of oil rigs.
Component: Bottom substrate
Type of indicator: E, state of the ecosystem.
Priority of indicator: e, essential.
Environmental quality objective:
• Grain size (gravel, sand, silt and mud) (Rosgeo/Sevmorgeo, MMBI, MAGE)
• Boulder bed (Rosgeo/Sevmorgeo, MAGE)
• Organic matter (Rosgeo/Sevmorgeo, Okeangeologiya)
• Colour of bottom sediment (Rosgeo/Sevmorgeo)
Map of ecosystems vulnerable to the chemical content of the near-bottom water and sediments. Source: Rosgeo/Sevmorgeo