Birds in southern Öresund in relation to the wind farm at ... - Vattenfall

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% of all echoes (flocks) % of all echoes (flocks) 40 35 30 25 20 15 10 5 0 40 35 30 25 20 15 10 5 0 Lillgrund A B C Sector D E Lillgrund A B C D E Sector 62 Day-time 2002 2005 2008 2009 2010 Night-time Fig. 42. Distribution of bird echoes (bird flocks) with north-easterly flight directions recorded by radar over southern Öresund during spring 2002 and 2005 pre- (filled bars) and 2009, 2009, 2010 post-construction (open bars) of the wind farm at Lillgrund for the different 10 km sectors A-E (see Fig. 7 and 40) for day (top) and night (bottom) migration separately. Fördelningen av fågelekon (flockar) med nordostliga flygriktningar registrerade med radar över södra Öresundsområdet under vårarna 2002 och 2005 (före etablering av vindkraftparken på Lillgrund, grå staplar) samt 2008, 2009 och 2010 (efter att parken tagits i drift, vita staplar), fördelat på 10 km-sektorerna A-E (se Fig. 7 och 40) och för dagsträck (ovan) och nattsträck (under) separat. 2002 2005 2008 2009 2010
The spring migration season, and hence the spring radar data set, can be divided in three periods roughly covering different main groups of migrants. The early period (March-April 10) is the peak migration period of Eiders, Common Scoters and some other early migrants; the middle period (April 11-May 15) cover the migration of Barnacle Geese, most ducks and other migrants; the late spring period (last half of May) is the main migration period of Brent Gees and waders breeding in arctic Russia. Analysing these three periods separately yielded the same overall pattern as described above. A lower proportion of the overall migration volume passed over sector C with the wind farm in operation compared to the preconstruction period (Fig. 43, 44, 45). The largest difference was found for the late spring period where the proportion passing over sector C was 36 % lower post- compared to preconstruction (Fig. 45). For the other periods the corresponding decreases in the proportion of the overall migration volume were 23 % (mid-spring) and 15 % (early spring) (Fig. 43, 44). % of all echoes (flocks) 45 40 35 30 25 20 15 10 5 0 Lillgrund A B C Sector D E 63 Early migrants 2002 2005 2008 2009 2010 Fig. 43. Distribution of bird echoes (flocks) with north-easterly flight directions registered by radar over southern Öresund in early spring (March-April 10) during spring 2002 and 2005 pre- (filled bars) and 2008, 2009 and 2010 post-construction (open bars) of the wind farm at Lillgrund for the different 10 km sectors (A-E, see Fig 7 & 40) Fördelningen av fågelekon (flockar) med nordostliga flygriktningar registrerade med radar över södra Öresundsområdet under den tidiga delen (mars-10 april) av vårarna 2002 och 2005 (före etablering av vindkraftparken på Lillgrund, grå staplar) samt 2008, 2009 och 2010 (efter att parken tagits i drift, vita staplar), fördelat på 10 km-sektorerna A-E (se Fig. 7 & 40)
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Birds in southern Öresund in relat
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Contents Summary 4 Svensk sammanfat
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the birds and/or the flocks, the be
Page 7 and 8:
Metoder Inventeringarna av rastande
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Alfågel (Fig. 14-19) Alfågeln öv
Page 11 and 12: Liksom vid andra inventeringar av r
Page 13 and 14: Introduction Southern Öresund is a
Page 15 and 16: Lillgrund is situated in the southe
Page 17 and 18: had to be made with only one observ
Page 19 and 20: Fig. 5. Map of the southern part of
Page 21 and 22: Fig. 6 . Map over the wind farm at
Page 23 and 24: transect was divided into 10 km lon
Page 25 and 26: Results Staging and wintering birds
Page 27 and 28: Table.3 Percentage of the total num
Page 29 and 30: Cormorant Phalacrocorax carbo As is
Page 31 and 32: Fig. 10. Summary distribution maps
Page 33 and 34: Overall Jacob’s index (D) for the
Page 35 and 36: Long-tailed Duck Clangula hyemalis
Page 37 and 38: ehind the large variation is that f
Page 41 and 42: Common Eider Somateria mollissima T
Page 47 and 48: Jacobs Index Jacobs Index 1 0,5 0 -
Page 49 and 50: 2500 2000 1500 1000 500 0 MIN MEAN
Page 51 and 52: Fig. 30. Details of Fig. 29 to show
Page 53 and 54: large-scale changes in abundance ar
Page 55 and 56: 600 500 400 300 200 100 0 MIN MEAN
Page 59 and 60: Jacobs Index Jacobs Index 1 0,5 0 -
Page 61: Lillgrund and the wind farm are sit
Page 65 and 66: % of all echoes (flocks) 45 40 35 3
Page 71 and 72: irds given the assumptions used abo
Page 73 and 74: % of all echoes (flocks) % of all e
Page 75 and 76: % av alla ekon (flockar) 20 15 10 5
Page 77 and 78: species, some species being better
Page 79 and 80: area and from a Dutch farm show tha
Page 81 and 82: distance from the farm, although mo
Page 83 and 84: Literature Alerstam, T. 1972. Noctu
Page 85: Petersen, I. K. & Fox A. D. 2007. C
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Birds in southern Öresund in relation to the wind farm at ... - Vattenfall

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