Lakes and Watercourses

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APPENDIX 2 Table 1b. Indicator genera for determining the Danish fauna index. The index is given inversely to the original version (Kirkegaard et al., 1992). ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– No. of diversity groups ≤ –2 –1 – 3 4 – 9 ≥ 10 ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– Group 1 ≥ 2 genera - 5 6 7 1 taxon - 4 5 6 Brachyptera Capnia Leuctra Isogenus Isoperla Isoptena Perlodes Protonemura Siphonoperla Ephemeridae Limnius Glossomatidae Sericomatidae ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– Group 2 4 4 5 5 Amphinemura Taeniopteryx Ametropodidae Ephemerellidae Heptageniidae Leptophlebiidae Siphlonuridae Elmis Elodes Rhyacophilidae Goeridae Ancylus If ≥ 5 individuals of Asellus go to group 3 If ≥ 5 individuals of Chironomus, go to group 4 ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– Group 3 3 4 4 4 ≥ 10 individuals of Gammarus Caenidae If ≥ 5 individuals of other Trichoptera than in group 2 Or ≥ 5 individuals of Chironomus, go to group 4 ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– 89
APPENDIX 2 ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– Group 4 ≥ 2 genera 3 3 4 - 1 taxon 2 3 - - ≥ 10 individuals of Gammarus Asellus Caenidae Sialis Other Trichoptera than in preceding groups ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– Group 5 ≥ 2 genera 2 3 3 - 1 taxon 2 2 3 - < 10 individuals of Gammarus Baetidae ≥ 25 individuals of Simuliidae If ≥ 100 individuals of Oligochaeta, go to group 5, 1 taxon If ≥ 2 individuals of Eristalinae, go to group 6 ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– Group 6 1 1 - - Tubificidae Psychodidae Chironomidae Eristalinae ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– (4) Acidity index (Henrikson & Medin, 1996) is calculated as the sum of the highest scores obtained for each of the criteria I – V below. I. Presence of mayflies (Ephemeroptera), stoneflies (Plecoptera) <strong>and</strong> caddis-flies (Trichoptera) with differing pH tolerance Genera having an indicator value of 3 (pH ≥ 5.4) score 3 points Genera having an indicator value of 2 (pH 4.8 – 5.4) score 2 points Genera having an indicator value of 1 (pH 4.5 – 4.8) score 1 point Genera having an indicator value of 0 (pH ≤ 4.5) score 0 points Genus Indicator value –––––––––––––––––––––––––––––––––––––––– EPHEMEROPTERA 1 Baetis rhodani 1 Baetis niger 1 Baetis digitatus 3 Baetis muticus 3 Heptagenia sulphurea 1 Genus Indicator value –––––––––––––––––––––––––––––––––––––––– Heptagenia fuscogrisea 0 Leptophlebia vespertina 0 Leptophlebia marginata 0 Ephemera danica 3 Ephemera vulgata 2 Ephemera sp. 2 90
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Environmental Quality Criteria - La
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TO ORDER Swedish Environmental Prot
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Reference Group Mats Bengtsson, Swe
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Summary This report on lakes and wa
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included. In addition to a large nu
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ased estimates are used. Given that
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TABLE 1. SUMMARY of parameters incl
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16 The current conditions scale in
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(in Swedish with English summary).
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conditions for watercourse flora an
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show the availability of nitrogen i
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Mean concentration of total phospho
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TABLE 9. DEVIATION from reference v
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Comments Classifications must be ba
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winter/spring, i.e. ice-covered per
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Light conditions Introduction Light
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TABLE 13. CURRENT CONDITIONS: turbi
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Acidity / acidification Introductio
Page 39 and 40: industrial pH). The change in acidi
Page 41 and 42: The pre-industrial concentration of
Page 43 and 44: very high degree of reliability and
Page 45 and 46: TABLE 19. CURRENT CONDITIONS: metal
Page 47 and 48: TABLE 22. DEVIATION from reference
Page 49 and 50: TABLE 24. (continued) Cu Zn Cd Pb C
Page 51 and 52: Swedish EPA (1993): Metals and the
Page 53 and 54: Assessment of current conditions TA
Page 55 and 56: TABLE 29. CURRENT CONDITIONS: poten
Page 59 and 60: References Cronberg, G., Lindmark,
Page 61 and 62: (see Appendix 1). If submerged and
Page 63 and 64: References Andersson, B. (1998): Va
Page 65 and 66: The genera in question and their tr
Page 67 and 68: Benthic fauna Introduction Benthic
Page 69 and 70: TABLE 41. CURRENT CONDITIONS: botto
Page 71 and 72: Comments The assessment must be bas
Page 73 and 74: has yielded better results than did
Page 75 and 76: TABLE 45. CURRENT CONDITIONS: fish,
Page 81 and 82: TABLE 48. (Contd.) Proportion of al
Page 84 and 85: Presentation of data When using the
Page 86 and 87: APPENDIX 1 Ceratophyllum demersum 1
Page 88 and 89: APPENDIX 2 Calculation of index and
Page 92 and 93: Genus Indicator value -------------
Page 94 and 95: APPENDIX 2 45 Planorbis sp. 46 Anis
Page 96 and 97: APPENDIX 2 214 Leuctra hippopus 215
Page 98 and 99: APPENDIX 2 384 Tinodes waeneri 385
Page 100 and 101: APPENDIX 2 (6) O/C index (Wiederhol
Page 102 and 103: APPENDIX 3 Dace Stäm Leuciscus leu
Page 106: REPORT 5050 Environmental Quality C
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