CEFAS21-08 RFQ BEEMS Benthic Sampling

Description of the sample collection:

The mudflat monitoring in Bridgwater bay encompass the collection of 6 replicates samples at 11 stations in Bridgwater Bay and Wick St Lawrence twice a year (February and August). The replicate samples are collected with a 0.01m2 core and the sediment is sieved through a 0.5 mm mesh sieve. All benthic organisms are transferred into 0.25L Nalgene bottle and fixed with 4 % formaldehyde. This request for quotation is for the processing of 132 sediment samples, split over 2 batches, to extract and identify all biota retained following sieving on a 0.5 mm mesh, as per the NMBAQC guidelines (http://www.nmbaqcs.org/media/1175/nmbaqc-inv-prp-v10-june2010.pdf) detailing extraction and identification protocols. In addition to this there is a requirement to ensure these data are audited as per the NMBAQC Own Samples protocol prior to submission to Cefas (Milner and Hall, 2016). http://www.nmbaqcs.org/media/1665/ownsampleprotocol_v12_ra.pdf.

Enumeration, identification and biomassing should be carried out following the NMBAQC Processing Requirement Protocol and Taxonomic Discrimination Protocol. Biomass to species level (wet weight in grams to at least 4 d.p.) is required for all countable taxa. Balances must be serviced annually, and a valid service certificate must be supplied with this tender.

A reference collection of all species/taxa identified should be returned to the Cefas laboratories in Lowestoft in an appropriate preservation liquid (i.e. 100% IDA or 70% IMS, 20% water and 10% glycerol). The reference collection should contain as a minimum the species name, name of identifier/ supervisor, station code, cruise code, date of collection and name of species identification verifier. A list of all taxa in the reference collection is also requested; in electronic form, with these details included. Notable taxa should be highlighted here such as non-native species and new or unusual records. Non-native species should be added to the Non-native Species Information Portal (NNSIP) (hosted on the Non-native Species Secretariat website, http://www.nonnativespecies.org/index.cfm?sectionid=81).

Summary of deliverables: