Kent Wildlife Trust, as part of the Balanced Seas project, has submitted a 277 sq km area around and including the Goodwin Sands to be designated a Marine Conservation Zone (MCZ) by DEFRA by 2018 (Zone 17 of the national framework of MCZs). One of the features designated for protection within the MCZ is the subtidal sand which is the target aggregate to be dredged. However, DEFRA are way behind in their designation schedule which means that Dover Harbour Board’s dredging licence application does not have to satisfy the criteria of a full MCZ assessment.
The proposed dredging zone includes the spawning and nursery grounds of several varieties of fish and the whole ecosystem of the area is based upon the sandeel which inhabits the seabed. Blue mussels, ross worms, shellfish, and the protected Thornback Ray are also found here. Remove the sand and gravel from the seabed and the natural habitat of all these species is lost.
The sediment plume (suspension of sediment in the water) created by the dredging risks asphyxiating fish eggs and less mobile sealife.
Sandeels inhabit this area of the sands in large numbers. However, a detailed survey would have to be carried out at night when the eels congregate on the seabed but the vessel operators deem it too dangerous, so no survey was actually done. The presence of Sandals is thus under estimated in the Environmental Impact Assessment.
According to the Zoological Survey of London’s most recent survey, a colony of nearly 500 grey and harbour seals live on the sandbanks north of the proposed dredging zone. They will be disturbed in their haul out site by the noise and vibration of the massive dredgers so close to their habitat. Also, their source of food would be reduced.
Conservationists are concerned this disturbance will cause fundamental changes in their behaviour including spontaneous abortions during the breeding season and pups becoming separated from their mother and ending up alone on the beaches of Kent.
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