CEFAS24-134 Contract for a geophysical & bathymetric survey of The Wash

Cefas · awarded 22 October 2024 · delivered in East of England

Who

Buyer	Cefas Lowestoft
Supplier	LandScope Engineering
Category	services
Classification	Survey services CPV 79311000
Notice published	28 October 2024

What it is for

The Marine Protected Area (MPA) monitoring programme is funded by the Department for Environment, Food and Rural Affairs (DEFRA) and through this programme, Cefas co-ordinates some of the evidence collection for the monitoring of MPAs in English waters. The Ross Worm Sabellaria spinulosa is a sedentary, epifaunal polychaete worm which builds tubes by consolidating particles of sediment (Limpenny et al, 2010). S. spinulosa is abundant in UK waters, largely existing in solitary form or within small, low-lying aggregations (Hayward and Ryland, 1990). However, under the right environmental conditions they also can establish dense colonies and form biogenic reefs. These biogenic reefs are protected as an Annex I habitat under the EU Habitats Directive (EEC, 1992), and Special Areas of Conservation (SACs) are designated for their protection. Important areas of consistently occurring reef have been found across The Wash where extensive areas of subtidal mixed sediments in the tide-swept approaches provide the right conditions for reefs to form, particularly in deeper waters. These reefs are an important but understudied feature of both The Wash and North Norfolk Coast (WNNC) SAC and Inner Dowsing, Race Bank and North Ridge (IDRBNR) SAC - named as 'The Wash and its approaches' hereafter. Requirement: With the aim of improving our understanding of the extent, distribution, and nature of S. spinulosa biogenic reef (i.e. reefiness) across The Wash and its approaches, Cefas has commissioned this Contract to deliver a geophysical and bathymetric survey of 9 blocks, with varying prioritisation. The primary acquisition will be Side Scan Sonar (SSS), with a desire for Multi Beam Echo Sounder (MBES) bathymetry to be acquired on an opportunistic basis (i.e. concurrent to acquiring SSS…

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