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Relevance of UK Biodiversity Action Plain
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Key Habitats - Coastal and Floodplain Grazing Marsh

Home > Relevance > Key Habitats > Coastal and Floodplain Grazing Marsh


 
Key Habitat

Coastal and Floodplain Grazing Marsh

Location

  • Southern England river valleys
  • RSPB priority area

Type of Mineral Extraction

  • Floodplain gravel
  • Coastal gravel
  • River estuary

Species
(s) = short list (m) = middle list (l) = long list
  • Particularly important for breeding waders:
Snipe (l)
Lapwing (l)
Curlew (l)
Redshank (l)
Teal (l)
Shoveler (l)

And over-wintering birds:

Bewick Swan (l)
Whooper Swan (l)

On flooded grasslands:

Wigeon (l)
Teal (l)
Mallard (l)
Golden Plover (l)
  • High diversity of native plant species and invertebrates
Examples of action required when Key Habitat is close
to proposed mineral working site

  • Mineral extraction in vicinity of coastal and floodplain grazing marsh could threaten the habitat if dewatering regime affects seasonal water levels and inundation.
  • Action to isolate the effects of lowering the groundwater is needed.
  • No levels should be raised which would block flood waters or seasonal inundation.

Opportunities during extraction

Creation, for example, of ponds, wader scrapes and ditches could attract wildfowl during extraction, and before final restoration is completed.

Opportunities for action before and after extraction

  • Extraction should only occur on areas downgraded by drainage, flood defence works, neglect, eutrophication, etc.
  • Ensure: restoration to levels that can be seasonally inundated; no blocks in flood plain; traditional water meadow management.
  • Could be difficult restoring soil structure in such conditions. Would possibly need dewatering regime until structure stabilised.
  • Would be difficult also on land backfilled with imported materials – pollution hazard, etc.
  • Most of these sites tend to end up restored to water areas: as a result, aggregates extraction is seen as one of the major threats, and a reason why such meadows have declined.
  • There is potential for extending floodplains from areas previously above flood plain levels. For details of restoration requirements refer FS24 of Reclamation of damaged land for nature conservation, HMSO.
  • The type of grassland that can be created depends on the soil type, climate, and drainage.





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