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Two species listed as ‘Near Threatened’ in Cheffing & Farrell (2005). The classification of ‘Near Threatened’ relates to species that are close becoming classified as threatened taxa. In the context of the county of Suffolk these taxa are well-distributed and typically occur on disturbed soils. Consequently the cable route is unlikely to have an adverse effect on the species as a whole
• Filago vulgaris (Common Cudweed) is species of disturbed acidic soils and occurs throughout the cable route on waste ground.
• Potentilla argentea (Hoary Cinquefoil) occurs occasionally in the grasslands covered by Target Notes 139, 189b, 194 and 304. It is classified as being locally frequent by Simpson (1982).
4.4.1.2 Nationally Scarce
Three species are listed as ‘Nationally Scarce’ i.e. found in less than 100 ten-kilometre grid-squares nationally in Stewart et al. (1994).
• Crassula tillaea (Mossy Stonecrop) was found in Target Notes 197, 194, 201, 374 and 379. It is concentrated on compacted disturbed soils on sands around Woodbridge.
• Sarcocornia perennis (Perennial Glasswort) occurs in both areas of saltmarsh along the River Deben Target Notes 246 and 315.
• Trifolium suffocatum (Suffocated Clover) was found abundantly at Target Note 191.
Both of these species are typical of disturbed sandy soils. Crassula tillaea (Mossy Stonecrop) was commonly observed in suitable habitat around Woodbridge i.e. most farm tracks and abandoned fields and waste areas. Trifolium suffocatum (Suffocated Clover) was restricted to areas around Target Note 191. It is possible that these species may benefit from the disturbed soils that would result from the cable route however the restricted nature of the population of Trifolium suffocatum (Suffocated Clover) means that should the soils of Target Note 191 be too greatly disturbed this population may be lost.
4.4.1.3 Invasive species
Four non-native invasive species that are listed on the Wildlife and Countryside Act 1981 Schedule 9. These comprise Carpobrotus edulis (Hottentot-fig), Elodea canadensis (Canadian Waterweed), Impatiens glandulifera (Indian Balsam) and Rosa rugosa (Japanese Rose). It is an offence to cause to grow or spread these species in the wild.
• Carpobrotus edulis (Hottentot-fig) was found on the cliff face at the land fall but is on the southerly limit of the survey area behind the M.O.D. site and consequently unlikely to be affected by the Preferred Onshore Cable Corridor route.