This environmental impact assessment for Kriegers flak ... - Vattenfall

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11.6 Animal life 11.6.1. Invertebrate benthic fauna In September 2003 IfAÖ, on behalf of Sweden Offshore, made an inventory of the selected area at Kriegers Flak. With the aid of a video camera the conditions of the seabed were studied in Þ ve transections, see illustration below. Seabed trawling was not possible due to large areas of stones and rocks. The area was researched by side viewing sonar and by multidirectional echo sounder. Register of species for macrophytes at Kriegers Flak (d: only drifting specimens) INVERTEBRATE BENTHIC FAUNA The composition of species of benthic fauna in the Baltic is mainly dependant on the salinity of the water. The higher the salinity, the more marine species are present. In the area around the Arcona basin there are for that reason many species in comparison with the central and eastern parts of the Baltic. But in comparison with number species in the Sea of Bælt in the west, from the Mecklenburger Bay to Kattegat, there are on the other hand smaller numbers present. The benthic fauna in the western Baltic consists mainly of species immigrated from the North Sea and who’s tolerance for the lower salinity varies from species to species. In the western Baltic, 240 different invertebrate benthic fauna species have been discovered, of which the majority are found in waters with a higher salinity. Of the invertebrate benthic species in the Baltic, the ringed worm Anelida with subspecies polycheat, Polychaeta and earth worm, Oligocheata, are the most common. Apart from these there are further species of molluscs Mollusca (mussels and shells) and crustaceans, Crustacea. The table on next page shows the composition of species at Kriegers Flak. In the Arcona basin there are only about 50 different species of invertebrate benthic fauna. The number varies within the basin depending on the hydrographical and sedimentation conditions. In the Arcona basin the composition of benthic fauna is decided by both depth of water (above and below the halocline) and by the substrate (for instance mud, sand and stone). The composition of macrozoobentos in the Arcona PRESENTATION OF THE AREA 77 Classs Taxon Occurance at Kriegers Flak Chlorophyceae Blidingia minima d Phaeophyceae Rhodophyceae Fucus vesiculosus d Laminaria saccharina d Sphacelaria plumigera - 20m Ceramium nodulosum - 25m Phyllophora truncata - 25m Polysiphonia fucoides - 25m Polysiphonia fi brillosa - 25m Rhodomela confervoides - 25m (30m) Spermatophyta Zostera marina d basin shows that few species exist. For over a hundred years the quantitative composition in the area has been documented. Up to 1950 there were only 7 different species. During the last century the number of species in the Arcona basin increased in several different spells. In the 1920’s for instance, the polycheat, Nephtys ciliata immigrated, in the 1950’s the iceland mussel, Arctica islandica and in the 1960’s the polycheat species, Phyllodoce mucosa and Trochochaeta multisetosa. In the 1960’s there were 12-18 different species in the area and after the large supply of salt water in the 1980’s as many as 24 species (HELCOM 1991a and b). Hardly any of the species in the Arcona basin stay permanently in the area. The Baltic fl at mussel Macoma baltica is the species which stays in the area on a more continuos basis. Only during years of a prolonged lack of oxygen it will abscond from the area. In the outer areas of the Arcona basin the, number of species for macrozoobentos is increasing. In a survey east of Rügen at a depth of 20-40 metres, 30 different species were found (Gosselck 1985). In the area of Rønnenbank 15 species were discovered in 1991 (Miljøministeriet Skov-og Naturstyrelsen 1994). In the beginning of the 1990’s Kube (1996) registered 25 different species in the Adlergrund trench. Most species were however discovered in the 1950’s under the auspices of Löwe (1963), when 40 different species were discovered. Of particular interest were the fi ndings of different species of crustaceans which do not normally exist the south-eastern parts of the Baltic, for example Pontoporeia affi nis and Saduria antomon.
78 PRESENTATION OF THE AREA Species and taxonomic index of macrozoobentos at Kriegers Flak (Surveys made by AfAÖ 2002 and 2003). Polychaeta forts. Cnidaria Polydora cornuta Crustacea Cordylophora caspia Polydora quadrilobata Balanus crenatus Gonothyraea loveni Pygospio elegans Balanus improvisus Hydrozoa, Athecata Scoloplos armiger Bathyporeia pelagica Hydrozoa, Thecata Sphaerodoropsis baltica Bathyporeia pilosa Plathelminthes Streblospio shrubsoli Carcinus maenas Turbellaria, indet. Streptosyllis websteri Corophium crassicorne Nemertini Syllides longocirrata Corophium volutator Nemertini, indet. Terebellides stroemi Crangon crangon Priapulida Travisia forbesii Diastylis rathkei Halicryptus spinulosus Oligochaeta Gammarus oceanicus Priapulus caudatus Clitellio arenarius Gammarus salinus Polychaeta Enchytraeidae Gammarus zaddachi Ampharete acutifrons Phallodrilus sp. Gastrosaccus spinifer Ampharete baltica Tubifex costatus Idotea balthica Arenicola marina Tubifi cidae Jaera albifrons Aricidea suecica Tubifi coides benedeni Microdeutopus gryllotalpa Bylgides sarsi Mollusca Monoporeia affi nis Capitella capitata Arctica islandica Mysis mixta Eteone longa Astarte borealis Neomysis integer Eumida sanguinea Astarte elliptica Palaemon elegans Fabricia stellaris Cerastoderma lamarcki Palaemonetes varians Hediste diversicolor Cingula striata Pontoporeia femorata Heteromastus fi liformis Corbula gibba Praunus fl exuosus Lagis koreni Hydrobia ulvae Praunus inermis Marenzelleria viridis Macoma balthica Saduria entomon Neanthes succinea Mya arenaria Insecta Neoamphitrite fi gulus Mytilus edulis Chironomidae-Larven Nephtys caeca Nudibranchia, indet. Bryozoa Nicolea zostericola Retusa truncatula Alcyonidium gelatinosum Ophelia limacina Theodoxus fl uviatilis Callopora lineata Pholoe inornata Zippora membranacea Electra crustulenta Phyllodoce mucosa Chelicerata Walkeria uva Polydora ciliata Nymphon brevirostre 90 arter och högre taxa
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This environmental impact assessmen
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Sweden Offshore Wind AB Hammarby Fa
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CONTENTS 8.3 Comparative discussion
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CONTENTS 12.10 Recreation and outdo
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6 PREAMBLE AND READER NOTES 1. Prea
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8 PREAMBLE AND READER NOTES Here, t
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10 SUMMARY 2. Summary Introduction
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12 SUMMARY any protected values or
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Background
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have less impact on the landscape p
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Consultation Report
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through Ms. Eva-Lena Olsson and Mr.
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Description of the Wind Farm
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5.2. Localisation The designated ar
Page 30 and 31: As examples, the technique behind t
Page 32 and 33: not yet been tested by the wind pow
Page 34 and 35: ) Biological surveys Extensive inve
Page 36 and 37: During the construction phase, the
Page 38 and 39: The wind turbines emit an aerodynam
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Page 42 and 43: Project economics
Page 44 and 45: Time table
Page 46 and 47: Alternative locations
Page 48 and 49: there are technical and economic li
Page 50 and 51: Miscellaneous An application for th
Page 52 and 53: ased on data measured in 2003. Cond
Page 54 and 55: heritage, meaning that any exploita
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Page 58 and 59: Alternative layout/scope
Page 60 and 61: sary. An example that has been stud
Page 62 and 63: The Zero Alternative
Page 64: • The mining of approximately 840
Page 67 and 68: 64 PRESENTATION OF THE AREA 11. Pre
Page 69 and 70: 66 PRESENTATION OF THE AREA 11.1.1
Page 71 and 72: 68 PRESENTATION OF THE AREA varies
Page 73 and 74: 70 PRESENTATION OF THE AREA 1995).
Page 75 and 76: 72 PRESENTATION OF THE AREA cont. f
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Page 85 and 86: 82 PRESENTATION OF THE AREA The cod
Page 87 and 88: 84 PRESENTATION OF THE AREA 11.6.3
Page 89 and 90: 86 PRESENTATION OF THE AREA Distrib
Page 91 and 92: 88 PRESENTATION OF THE AREA to acqu
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Page 97 and 98: 94 PRESENTATION OF THE AREA Night a
Page 99 and 100: 96 PRESENTATION OF THE AREA d) Surv
Page 101 and 102: 98 PRESENTATION OF THE AREA During
Page 103 and 104: 100 PRESENTATION OF THE AREA Indivi
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Page 111 and 112: 108 PRESENTATION OF THE AREA Shippi
Page 113 and 114: 110 PRESENTATION OF THE AREA 11.11.
Page 115 and 116: 112 PRESENTATION OF THE AREA These
Page 117 and 118: 114 PRESENTATION OF THE AREA to pre
Page 119 and 120: 116 CONSEQUENSES OF THE WIND FARM 1
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128 CONSEQUENSES OF THE WIND FARM
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130 CONSEQUENSES OF THE WIND FARM 1
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132 CONSEQUENSES OF THE WIND FARM J
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136 CONSEQUENSES OF THE WIND FARM c
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138 CONSEQUENSES OF THE WIND FARM A
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140 CONSEQUENSES OF THE WIND FARM I
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142 CONSEQUENSES OF THE WIND FARM p
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Cumulative effects
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and the track at low visibility is
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13.3 Current conditions/ saltwater
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Control program
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14.2 Fish The wind farm’s possibl
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Collected judgement
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15.3.2 The operational phase The fa
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164 CABLE LAYING 16. Cable laying I
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166 CABLE LAYING 16.2 Design The tr
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168 CABLE LAYING There will be rest
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170 BIBLIOGRAPHY 17. Bibliography A
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172 BIBLIOGRAPHY ratoriet, Lysekil.
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174 FTABLE OF ATTACHMENTS 19. Table
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1 Wind farm, view from Trelleborg,
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Wind farm, view from Trelleborg, 30
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Wind farm, view from ships bridge,
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7 Wind farm, view from Møn, 30 km,
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9 Wind farm, view from Rügen, 42 k
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