Marin Habitatkortlægning I De Indre Danske Farvande 2014

Marin Habitatkortlægning I De Indre Danske Farvande 2014

Titel: Marin habitatkortlægning i de indre danske farvande 2014 Udgiver: Faglige forfattere GEUS: Zyad Al-Hamdani Naturstyrelsen Jørn Bo Jensen Haraldsgade 53 Sara Skar 2100 København Ø Niels Nørgaard-Pedersen www.nst.dk Jørgen O. Leth Steen Lomholt År: Ole Bennike 2014 Henrik Granat Mikkel Skovgaard Andersen Lars G. Rödel Bjarni Pjetursson Faglige forfattere DCE: Michael Bo Rasmussen Karsten Dahl Cordula Göke Annette Bruhn Ole Gorm Norden Andersen 2 Indhold 1. Indledning ....................................................................................................... 13 1.1 Formål og opgavedefinition.................................................................................................. 13 2. Metodebeskrivelse ............................................................................................ 15 2.1 Datatæthed i undersøgelsesområderne ............................................................................... 16 2.1.1 Habitatnaturtypekortlægning data ....................................................................... 16 2.2 Opmålingsfartøjer og skibskonfiguration ............................................................................ 16 2.2.1 Maritina (Targa 31) ................................................................................................ 16 2.2.2 GEUS II .................................................................................................................. 17 2.2.3 DCE’s båd Marina .................................................................................................. 17 2.3 Positionering .........................................................................................................................18 2.4 Bathymetri.............................................................................................................................18 2.5 Akustisk kortlægning med sedimentekkolod (Innomar SES-2000) .................................. 19 2.6 Akustisk kortlægning med side scan sonar .......................................................................... 19 2.7 Håndtering af effekter ved seismisk støj på havpattedyr .................................................... 19 2.8 Visuel dokumentation og verifikation med videotransekter .............................................. 20 2.9 Visuel dokumentation af kystnære områder ....................................................................... 21 2.10 Eksisterende kortlægning baseret på multibeam data ........................................................ 21 2.11 Database ............................................................................................................................... 23 2.11.1 Tilgængelighed ...................................................................................................... 25 2.12 Bundtype og biologisk klassificering ................................................................................... 27 3. Generel områdebeskrivelse og -afgrænsning .................................................... 31 3.1 Kattegat ................................................................................................................................ 34 3.1.1 Geologiske forhold ................................................................................................ 34 3.1.2 Biologiske forhold ................................................................................................. 35 3.2 Bælthavet .............................................................................................................................. 36 3.2.1 Geologiske forhold .................................................................................................37 3.2.2 Biologiske forhold ..................................................................................................37 3.3 Den vestlige del af Østersøen & Nakskov Fjord ...................................................................37 3.3.1 Geologiske forhold ................................................................................................ 38 3.3.2 Biologiske forhold ................................................................................................. 38 4. Bearbejdning og tolkning af data ...................................................................... 39 4.1 Klassifikation ....................................................................................................................... 39 4.1.1 Substrattyper ......................................................................................................... 39 4.1.2 Habitatnaturtyper ................................................................................................. 42 4.1.3 Udbredelse af dominerende samfund .................................................................. 48 4.2 Udarbejdelse af kortmateriale ............................................................................................. 48 4.2.1 Oversigtskort med nye data .................................................................................. 48 4.2.2 Dybdeforhold ........................................................................................................ 49 4.2.3 Substrattype- og bundtypekort herunder menneskelige aktiviteter ................... 49 4.2.4 Habitatnaturtypekort ............................................................................................ 50 5. Resultater – substrat- og habitatnaturtype kortlægning .................................... 52 5.1 Habitatområde nr. 176 Havet omkring Nordre Rønner ..................................................... 52 3 Marin habitatkortlægning i de indre danske farvande 2014 5.1.1 Eksisterende data .................................................................................................. 53 5.1.2 Substrattyper ......................................................................................................... 54 5.1.3 EU Habitatdirektivets naturtyper ........................................................................ 54 5.1.4 Klassificering af flora og fauna ..............................................................................55 5.1.5 Kortlægning af dominerende samfund ................................................................ 56 5.1.6 Andre observationer (vrag, trawl, kabler m.m.) ................................................... 57 5.2 Habitatområde nr. 112 Hesselø med omliggende stenrev .................................................. 58 5.2.1 Eksisterende data .................................................................................................. 59 5.2.2 Substrattyper ......................................................................................................... 59 5.2.3 EU Habitatdirektivets naturtyper ........................................................................ 60 5.2.4 Klassificering af flora og fauna .............................................................................. 61 5.2.5 Kortlægning af dominerende samfund ................................................................ 62 5.2.6 Andre observationer (vrag, trawl, kabler m.m.) .................................................. 63 5.3 Habitatområde nr. 51 Stavns Fjord, Samsø Østerflak og Nordby Hede ............................ 64 5.3.1 Eksisterende data .................................................................................................. 65 5.3.2 Substrattyper ......................................................................................................... 65 5.3.3 EU Habitatdirektivets naturtyper ........................................................................ 66 5.3.4 Klassificering af flora og fauna ............................................................................. 67 5.3.5 Kortlægning af dominerende samfund ................................................................ 68 5.3.6 Andre observationer (vrag, trawl, kabler m.m.) .................................................. 69 5.4 Habitatområde nr. 52 Horsens Fjord, havet øst for og Endelave ...................................... 70 5.4.1 Eksisterende data ................................................................................................... 71 5.4.2 Substrattyper .......................................................................................................... 71 5.4.3 EU Habitatdirektivets naturtyper ........................................................................ 72 5.4.4 Klassificering af flora og fauna ..............................................................................73 5.4.5 Kortlægning af dominerende samfund ................................................................ 74 5.4.6 Andre observationer (vrag, trawl, kabler m.m.) ................................................... 75 5.5 Habitatområde nr. 100 Centrale Storebælt og Vresen ....................................................... 76 5.5.1 Eksisterende data ................................................................................................... 77 5.5.2 Substrattyper .......................................................................................................... 77 5.5.3 EU Habitatdirektivets naturtyper ........................................................................ 78 5.5.4 Klassificering af flora og fauna ............................................................................. 79 5.5.5 Kortlægning af dominerende samfund ................................................................ 80 5.5.6 Andre observationer (vrag, trawl, kabler

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