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The emission of organic matter is a key environmental problem. Among the pollutants mentioned are Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), and Total Organic Carbon (TOC). BOD, COD and TOC are key indicators of the oxygen content of water.
This indicator shows:
1. Annual median concentrations in rivers of Biological Oxygen Demand (BOD) and ammonium (NH4).
2. Trends in concentrations of orthophosphate and nitrate in rivers, total phosphorus and nitrate in lakes, and nitrate in groundwater bodies.
Units
The concentration of nitrate is expressed as mg nitrate (NO3)/l for groundwater and mg nitrate-nitrogen (mg NO3-N/l) for rivers and orthophosphate and total phosphorus as mg P/l.
The indicator shows changes in the conservation status of habitats of European interest.
It is based on data collected under the reporting obligations of Article 17 of the EU Habitats Directive (92/43/EEC).
Areas designated under national legislation for the purpose of nature protection including sites such as national parks and nature reserves.
Soil organic carbon is the carbon (C) stored in soil organic matter (SOM). Organic carbon (OC) enters the soil through the decomposition of plant and animal residues, root exudates, living and dead microorganisms, and soil biota. SOM is the organic fraction of soil exclusive of nondecomposed plant and animal residues. Nevertheless, most analytical methods do not distinguish between decomposed and non-decomposed residues. SOM is a heterogeneous, dynamic substance that varies in particle size, C content, decomposition rate, and turnover time.
Species diversity is a measure of the diversity within an ecological community that incorporates both species richness (the number of species in a community) and the evenness of species' abundances. Species diversity is one component of the concept of biodiversity.
The indicator shows changes in the conservation status of habitats by habitat group.
It is based on data collected under the reporting obligations of Article 17 of the EU Habitats Directive (92/43/EEC).
The water exploitation index (WEI) is the mean annual total abstraction of freshwater as percentage of the mean annual total renewable freshwater resource at the country level,.