616b2722-8318-4266-8b21-cbb76114d96d English series series The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk pointOfContact 2025-04-09 MEDIN 3.1.2 EPSG Geodetic Parameter Registry 2021-01-06 revision WGS 84 2024, Ocean Ecology, Langstone Village Saltmarsh, Saltmarsh Restoration Benthic Survey 2025-04-09 publication MDE-TCE-192-4151 The Langstone Village saltmarsh restoration project is looking into the feasibility of undertaking beneficial use of dredged sediment (BUDS) to restore an area of intertidal saltmarsh habitat. Ocean Ecology Ltd (OEL) has been commissioned by Havant Borough Council to undertake an intertidal benthic characterisation survey to determine the baseline conditions and habitats within the proposed saltmarsh restoration area. Ocean Ecology Limited Data Manager info@ocean-ecology.com owner The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk custodian Ocean Ecology Limited Data Manager info@ocean-ecology.com originator The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk distributor notPlanned Marine Environmental Data and Information Network MEDIN metadata record availability 2025-04-09 revision Habitats and biotopes GEMET - INSPIRE themes, version 1.0 2021-09-28 revision Dissolved total or organic phosphorus concentration in the water column Habitat characterisation Habitat extent Nitrogen concentrations in sediment SeaDataNet Parameter Discovery Vocabulary 2021-09-28 revision otherRestrictions No Limitations when published on the MDE otherRestrictions Data Must be used in accordance to the Marine Data Exchange's Terms of Use: https://www.marinedataexchange.co.uk/content/info/terms-of-use English 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 biota environment geoscientificInformation oceans -0.99808216094971 -0.95104694366455 50.832992109682 50.847030181096 SeaVox salt and freshwater body gazetteer 2021-01-06 creation Solent 2024-09-19 2024-09-20 SeaVoX Vertical Co-ordinate Coverages 2021-01-06 revision bathybenthic Documents Geographic Information System https://www.marinedataexchange.co.uk/details/TCE-4151/summary A link to the web service or dataset. https://www.marinedataexchange.co.uk A link to the general host site. series Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication Not Required in Project or MDE false The survey was undertaken during low spring tide on the 19th and 20th September 2024. Survey operations were carried out utilising OELs 4-man hovercraft Solea and consisted of a Phase I walkover survey and a Phase II survey which included the collection of sediment cores for further sediment and macrobenthic analyses. Five sediment cores were also analysed for sediment chemistry. Sediments were classified as littoral muds with varied gravel and sand components with mean grain size ranging from 18 – 2,910 µm. Across all stations, the concentrations of heavy and trace metals, organotins, nitrate, the 7 ICES PCBs and most PAHs were below the limit of detection or the CEFAS Action Level 1 (AL1). Seven PAHs were above the OSPAR BAC level, notably at station ST006, and for Fluoranthene at most sites where the AL1 was also exceeded. Total organic carbon, phosphate, exchangeable ammonium and total nitrogen levels are provided and discussed in relation to the habitats found. The habitat map produced identified 6 different biotopes. However, the Langstone Village survey area was relatively homogeneous and with 76 % being characterised by EUNIS biotope MA622 Faunal communities of variable salinity Atlantic littoral mud on the mid to upper shore and MA6223 Nephtys hombergii, Macoma balthica and Streblospio shrubsolii in Atlantic littoral sandy mud on the mid to lower shore. The biotope MA225 Atlantic pioneer saltmarshes was primarily mapped in the western extent of the site and comprised of Spartina sp. A total area of 22,840 m2of saltmarsh was recorded, 7% of the survey area. All three habitats are listed as Annex I and OSPAR priority habitats and their species compositions and key physical characteristics are described in this report (along with all biotopes mapped)