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Elm hedge and associated field margin south east of Seckford Roundabout on slip road towards Martlesham (TM 255481)
The hedge sits above the road on its east side and makes a margin with a grassland area. It is indicated in Figure 24.9.1 (sheet 2) and will be partially lost due to construction works (circa 35m section).
Hedgerows and the transitional zones that they make with grassland, especially neglected grassland, often form significant reservoirs of intrinsic invertebrate interest. In addition, hedges form physical corridors that permit movement of invertebrates across a landscape that may be otherwise inhospitable.
Mitigation for the loss of this hedge is desirable and should take the form of re-instatement of lost habitat in the post-construction period.
Area J: Martlesham Creek Crossing (TM 263476)
On the north side of the creek, tall scrubby ruderal habitat gives way to the narrowest of saltmarsh zones above tidal mud.
Horizontal Direction Drilling (HDD) methods will be used to cross major watercourses and on this basis no loss of invertebrate interest is likely. In particular, we do not consider that there is any risk to habitats likely to be occupied by the Whorl Snail, Vertigo angustior, which has been reported from this section of the route by another party.
Area K: River Deben Crossing
The surrounding fields on both banks are arable, but there is an extremely narrow strip of saltmarsh habitat above the tidal mud. invertebrate interest.
Saltmarsh and other tidal or semi-tidal habitats hold the highest
HDD will be used to insert the cable beneath major watercourses and on this basis no loss of invertebrate interest is likely at the River Deben crossing. Some disruption to parts of the bank are expected; if this is restricted to dry land habitats there ought to be a rapid recovery from temporary habitat losses.
East Anglia Cable - Suffolk Invertebrate Survey July 2012
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Colin Plant Associates (UK) LLP Consultant Entomologists Report number BS/2709/12