Lakes and Watercourses

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APPENDIX 2 (6) O/C index (Wiederholm, 1980) is calculated as: the density of oligochaetes divided by the density of oligochaetes and sediment-living chironomids (not including non-sediment-living species such as Procladius sp.), expressed as a percentage. Values are depthcorrected by dividing the ratio obtained above by the sampling depth. References Armitage, P.D., Moss, D., Wright, J.F. & Furse, M.T. (1983): The performance of a new biological water quality score system based on macroinvertebrates over a wide range of unpolluted running-waters. – Water Research 17:333-347. Henrikson, L. & Medin, M. (1986): Biologisk bedömning av försurningspåverkan på Lelångens tillflöden och grundområden 1986 (”Biological assessment of the impact of acidification on tributaries and shallow areas of the river Lelången, 1986”). – Aquaekologerna, Report submitted to Älvsborg County Administrative Board. Shannon, D.E. (1948): A mathematical theory of communication. Bell System Technological Journal 37:379–423. Skriver, J., Friberg, N. & Kirkegaard, J. (to press): Biological assessment of watercourse quality in Denmark: Introduction of the Danish Stream Fauna Index (DSFI) as the official biomonitoring method. – Verhandlung der Internationalen Vereinigung für Theoretische und Angewandte Limnologie 27. Wiederholm, T. (1980): Use of benthos in lake monitoring. – Journal of the Water Pollution Control Federation 52:537-547. 99
APPENDIX 3 List of Swedish freshwater fish species R = reproduces annually CP = commonly present Ex = previously, annual reproduction, but not present since 1850 (i) = introduced * = not present year-round in inland waters –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– Family Scientific name English name Swedish name Petromyzontidae Nejonögon Lampern Flodnejonöga Lampetra fluviatilis (Linnaeus, 1758) R Brook lamprey Bäcknejonöga Lampetra planeri (Linnaeus, 1758) R Lamprey Havsnejonöga Petromyzon marinus (Bloch, 1748) R Acipenseridae Störfiskar Sturgeon Stör Acipenser sturio (Linnaeus, 1758) Ex Anguillidae Ålfiskar Eel Ål Anguilla anguilla (Linnaeus, 1758) CP Clupeidae Sillfiskar Allis shad Majsill Alosa alosa (Linnaeus, 1758) R* Twaite shad Staksill Alosa fallax (La Cépéde, 1800) CP* Cyprinidae Karpfiskar Zope Faren Abramis ballerus (Linnaeus, 1758) R Silver bream Björkna Abramis bjoerkna (Linnaeus, 1758) R Bream Braxen Abramis brama (Linnaeus, 1758) R Baltic vimba Vimma Abramis vimba (Linnaeus, 1758) R Bleak Benlöja Alburnus alburnus (Linnaeus, 1758) R Asp Asp Aspius aspius (Linnaeus, 1758) R Crucian carp Ruda Carassius carassius (Linnaeus, 1758) R Carp Karp Cyprinus carpio (Linnaeus, 1758) R (i) Gudgeon Sandkrypare Gobio gobio (Linnaeus, 1758) R Moderlieschen Groplöja Leucaspius delineatus (Heckel, 1758) R Chub Färna Leuciscus cephalus (Linnaeus, 1758) R Ide Id Leuciscus idus (Linnaeus, 1758) R 100
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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
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industrial pH). The change in acidi
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The pre-industrial concentration of
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very high degree of reliability and
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TABLE 19. CURRENT CONDITIONS: metal
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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 57 and 58: TABLE 32. DEVIATION from reference
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 90 and 91: APPENDIX 2 Table 1b. Indicator gene
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 102 and 103: APPENDIX 3 Dace Stäm Leuciscus leu
Page 106: REPORT 5050 Environmental Quality C
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