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Division NORTHERN LAKES GEOGRAPHICAL INTERCALIBRATION GROUP RESULTS Biological Quality Element Macrophytes and Phytobenthos Sub-Biological Quality Element Macrophytes

United Kingdom

Original text. Later amendments are not shown.

Description of types that have been intercalibrated

TypeLake characterisationAlkalinity (meq/l)Color(mg Pt/l)
L-N-M 101Low alkalinity, clear0,05 — 0,2< 30
L-N-M 102Low alkalinity, humic0,05 — 0,2> 30
L-N-M 201Moderate alkalinity, clear0,2 — 1,0< 30
L-N-M 202Moderate alkalinity, humic0,2 — 1,0> 30
L-N-M 301aHigh alkalinity, clear, atlantic subtype> 1,0< 30
L-N-M 302aHigh alkalinity, humic, atlantic subtype> 1,0> 30
Types 101, 102, 201 and 202:

  • Ireland, Finland, Norway, Sweden, United Kingdom.

    • Type 301a:

  • Ireland, United Kingdom.

    • Type 302a:

  • Ireland, United Kingdom

    • Will be used in England, Wales and Scotland

    Will be used also in the UK (North Ireland)
    CountryNational classificationmethods intercalibratedEcological Quality Ratios
    High-good boundaryGood-moderate
    FinlandFinnish macrophyte classification system (Finnmac)0,8 (all types)0,6 (all types)
    IrelandFree Macrophyte Index0,9 (all types)0,68 (all types)
    NorwayNational macrophyte index (Trophic Index — TIc)

    Type 101: 0,98

    Type 102: 0,96

    Type 201: 0,95

    Type 202: 0,99

    Type 101: 0,87

    Type 102: 0,87

    Type 201: 0,75

    Type 202: 0,77

    SwedenTrophic Macrophyte Index (TMI)

    Type 101: 0,93

    Type 102: 0,93

    Type 201: 0,89

    Type 202: 0,91

    Type 101: 0,8

    Type 102: 0,83

    Type 201: 0,78

    Type 202: 0,78

    UKLake LEAFPACS 2f1 0,8 (all types)0,66 (all types)
    UKFree Macrophyte Indexf2 0,9 (all types)0,68 (all types)
    1. Results:Division Results:

    Annotations

    Footnotes

    f1

    Will be used in England, Wales and Scotland

    f2

    Will be used also in the UK (North Ireland)