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Non Native Species Survey

Ant Valley Non-Native Species Survey

The Norfolk Non-native Species Initiative is funding a survey of the Ant Valley looking for non-native species such as Japanese Knotweed, Himalayan Balsam, Giant Hogweed and American Mink. Non-native plant species such as Japanese Knotweed and Himalayan Balsam spread rapidly, outcompeting native wild plants and flowers. 

Aquatic invasive plants like Floating Pennywort block channels and ponds, reducing light and oxygen and causing harm to native plants, fish and invertebrates. 

American Mink have a devasting impact on native water vole and waterfowl populations.                                                                                                                                                                                                                                                                                               Giant Hogweed

The survey is concentrating on the six priority species listed below -

Himalayan Balsam

The Big Six'

1. Australian swamp stonecrop (Crassula helmsii)
2. Japanese knotweed (Fallopia japonica)
3. Giant hogweed (Heracleum mantegazzianum)
4. Floating pennywort (Hydrocotyle ranunculoides)
5. Himalayan balsam (Impatiens glandulifera)
6. Parrot's feather (Myriophyllum aquaticum)

Update - 9th August 2010

Australian swamp stonecrop (Crassula helmsii)- This has been spotted in Southrepps (See picture)

 

 

 

 

 

 

 

 

Himalayan balsam (Impatiens glandulifera)- This has been identified in Antingham. (See picture)

For more information go to   WWW.NORFOLKBIODIVERSITY.ORG/NONNATIVESPECIES/

Images of Giant Hogweed and Himalayan Balsam thanks to GBNNSS

 

• Help stop the spread of invasive plants and animals in British waters-

 

     

• Find out more abut DEFRA's "Clean, check, dry" campaign here