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Strangford Lough Ecological Change Investigation Workshop Recent changes in the distribution of some intertidal mollusc

Strangford Lough Ecological Change Investigation Workshop Recent changes in the distribution of some intertidal molluscs. Julia Nunn C entre for E nvironmental D ata a nd R ecording Ulster Museum. History of recording intertidal marine molluscs in Strangford Lough.

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Strangford Lough Ecological Change Investigation Workshop Recent changes in the distribution of some intertidal mollusc

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  1. Strangford Lough Ecological Change Investigation WorkshopRecent changes in the distribution of some intertidal molluscs Julia Nunn Centre for Environmental Data and Recording Ulster Museum

  2. History of recording intertidal marine molluscs in Strangford Lough • early 19th century: Dickie (published 1858) • 1940’s-1950’s: Williams (published 1954) • 1960’s - 1970’s: Queen’s University • 1984-1987: Northern Ireland Littoral Survey • 1989-1992: M.Sc. Nunn (published 1994) • 1999 onwards: Biotope mapping Queen’s University • 2003 SLECI

  3. Trophon truncatus (Strøm, 1768)

  4. Tonicella marmorea (O Fabricius, 1780)

  5. Rissoella globularis (Forbes & Hanley, 1852)

  6. Tectura testudinalis (Müller, 1776)

  7. Ostrea edulis L., 1758 all records pre-1994

  8. Gibbula umbilicalis(da Costa, 1778)

  9. Gibbula umbilicalis1952-1953 Gibbula umbilicalisall records to 2003

  10. Gibbula umbilicalis recording history in Strangford Lough • Dickie (published 1858) • 1940’s-1950’s Williams (published 1954) • Northern Ireland Littoral Survey • 1989-1992 M.Sc.

  11. Gibbula umbilicalisStrangford Lough all records pre-1994

  12. Gibbula umbilicalisStrangford Lough all records to 2003

  13. Gibbula umbilicalisStrangford Loughestimates of maximum density

  14. Osilinus lineatus(da Costa, 1778)

  15. Osilinus lineatus 1952-53 Osilinus lineatusall records to 2003

  16. Osilinus lineatusStrangford Lough all records pre-1994

  17. Osilinus lineatus recording history post 1993 • St John’s Point • Phennick, Ardglass • Benderg Bay

  18. Benderg Bay 2.8.03

  19. Millquarter Bay 15.8.03

  20. Kilclief Bay 15.8.03 near sewage plant 17.8.03

  21. Ballywhite Bank & Marlfield, Strangford Lough 25.9.03

  22. Ballyquintin 27.9.03

  23. Osilinus lineatus Strangford Lough all records to 2003 including negative

  24. Osilinus lineatusStrangford Loughsettlement dates

  25. Summary • The status of some intertidal species recorded from Strangford Lough (known to be at the limits of their range in the north of Ireland), has been discussed • Gibbula umbilicalis is reported for the first time from the main body of Strangford Lough in 1999, where it is now abundant • Osilinus lineatus is reported for the first time from Strangford Lough in 2003 extending its northern limit on the east coast of Ireland by more than 17km. Settlement in the Narrows and main Lough took place progressively during the late 1990's and has continued into the years 2000 & 2001.

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