GALLERY

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Shore Transect
 
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Shore Transect
 
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Quadrat
 
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Quadrat
 
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Shore Profile
 
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Transect locations and profiles
 

INTERTIDAL SURVEYS

Intertidal surveys may be required for a number of different reasons e.g. offshore cable/pipeline landfall sites, monitoring of conservation sites, baseline data required for EIAs, characterising surveys of conservation sites, marina/pier developments.

AQUAFACT has the capabilities and expertise to plan and design these intertidal surveys, to carry out the sampling, to process the samples and identify the fauna and habitats present and assign biotope classifications.

Sampling can be carried out in a number of ways depending on the area to be surveyed and the state of the tide. Typically, at low water, a transect is surveyed from the high water mark down the shore to the low water mark. Along this transect, the upper shore, middle shore and lower shore are identified. Each zone is surveyed using a quadrat. All floral and faunal life observed within the quadrat is noted along with sediment type. The SACFOR (Superabundant, Abundant, Common, Frequent, Occasional, Rare) abundance scale is used to quantify the species present. Where he sedimentary environment allows, replicate cores are taken from within the quadrat. The returns from these cores are processed and treated in line with current guidelines and methodologies.

Intertidal areas can also be surveyed by divers when the tide is in. The same methodology also applies here.

During an intertidal survey, the slope and distance of the shore line is calculated.

SEDIMENT

Analysis of sediment samples can include sediment grain size, total organic carbon content, heavy metal levels, PAHs, PCBs, TBT, oil identification and dioxins.

FAUNA

One of AQUAFACT’s core fields of expertise is the identification of intertidal and coastal flora and fauna. Our in-house specialists and consultants cover such diverse groups as sponges, coelenterates, polychaetes, crustaceans, molluscs, echinoderms, bryozoans, tunicates, minor invertebrate phyla, fish and birds. All our specialists are experts in their fields and regularly publish reviews and revisions of their specific taxa in international journals.

Once the sedimentary environment and faunal and floral species present have been identified, each intertidal zone is assigned a biotope classification. The classification is intended as a tool to aid management and conservation of marine habitats

SEAWEED BIOMASS ASSESSMENTS

AQUAFACT has been involved in seaweed biomass assessments for a large number of bays predominantly along the west coast of Ireland. The data collected during these assessments has been used in Foreshore Licence applications for seaweed harvesting. AQUAFACT also provide all mapping, consultation services and Appropriate Assessments (Natura Impact Statement) associated with the seaweed harvesting application. 

EXAMPLES OF AREAS WHERE AQUAFACT HAVE UNDERTAKEN INTERTIDAL SURVEYS:

  • Achill Sound, Mayo
  • Baldoyle Bay, Dublin
  • Ballynakill Bay, Galway
  • Ballyness Bay, Donegal
  • Ballyteigue Burrow, Wexford
  • Ballyvaughan Bay, Clare
  • Bannow Bay, Wexford
  • Bellacragher Bay, Mayo
  • Bertraghbui Bay, Galway
  • Blacksod Bay, Mayo
  • Boyne Estuary, Louth
  • Broadhaven Bay, Mayo
  • Cashla Bay, Galway 
  • Clew Bay, Mayo
  • Clifden Bay, Galway
  • Connemara, Galway
  • Cork Harbour
  • Courtown, Wexford
  • Doonbeg Bay, Clare
  • Dublin Bay
  • Dundalk Bay
  • Dungarvan Harbour, Waterford
  • Galway Bay
  • Greatmans Bay, Galway
  • Inishbofin Island, Galway
  • Islandmagee, Antrim
  • Kilkee, Down
  • Kilkieran Bay, Galway
  • Killary Harbour, Mayo/Galway
  • Kilmore Quay, Wexford
  • Kilronan, Inishmore
  • Kingstown Bay, Galway
  • Larne Harbour, Antrim
  • Lough Swilly, Donegal
  • Mannin Bay, Galway
  • Shannon Estuary
  • Sneem, Kerry
  • Sruwaddacon Bay, Mayo
  • Strangford Lough, Down
  • Streamstown Bay, Galway
  • Tullaghan Bay, Mayo