Coastal survey
Intertidal survey is often a requirement where coastal development such as new marinas or coastal defences could potentially impact on local marine ecology. An assessment may also be required as part of an Environmental Impact Assessment or for conservation purposes. There are two standard methods for intertidal ecology assessment:
Marine Intertidal Phase 1 Biotope Survey
This method examines the area between the spring high and spring low tide levels using a combination of aerial photograph analysis and field survey. A digitised map of the intertidal zone is produced, showing the distribution of the main biotopes (marine habitat classifications). Target Notes are used to indicate biotopes present only in small patches, as well as noteworthy features such as species of conservation concern. This type of survey can be carried out throughout the year.
Marine Intertidal Phase 2 Biotope Survey
Where more detailed information is required Phase 2 Biotope survey would be undertaken, the methodology depending upon the nature of the biotopes present (sediment, rock or saltmarsh biotope). Outputs would include detailed biotope descriptions, including floral and faunal species lists and abundance information, as well as a map to indicate biotope distribution. This type of survey can be also carried out throughout the year.
Our specialists undertake intertidal mapping of sediment and rocky zones in accordance with the Marine Nature Conservation Review (MNCR) Phase II marine survey guidelines and the Marine Biotope Classification for Britain and Ireland.
These assessments can be used to quantify the direct and indirect impacts of coastal zone development on the inter-tidal zone and can be undertaken alongside terrestrial Phase 1 Habitat mapping if required.