List name
WFD UKTAG aquatic alien species impact
Owner
s.ratcliffe@nbn.org.uk
List type
Species characters list
Description
Species listed in the 2015 UKTAG Classification of Alien Species working paper. The United Kingdom Technical Advisory Group (UKTAG) was established to provide coordinated advice on technical aspects of the implementation of the Water Framework Directive (WFD) in the UK. Part of the role of the UKTAG is to help assess the risk of water bodies failing to achieve the WFD's environmental objectives. The UKTAG consider that non-native species are one of the significant pressures that could result in a water body failing to meet environmental objectives (such as failing to achieve good ecological status). The UK TAG Alien Species Group (ASG) is a technical sub-group that provides scientific advice to the Water Framework Directive UK Technical Advisory Group. The ASG uses scientific evidence to decide how an invasive non-native species should be categorised in relation to the potential level of adverse impact and risk it poses to the water environment; economic considerations or other issues are not taken into account at this stage. Species are assessed to be of high, low, or unknown impact and this listing is then incorporated into guidance for the implementation of the Water Framework Directive (WFD).
Date submitted
2018-07-06
Date updated
2019-03-15
Is private
No
Included in species pages
Yes
Authoritative
No
Invasive
No
Threatened
No
Part of the sensitive data service
No
Region
UK
Metadata link
https://registry.nbnatlas.org/public/show/dr1863

152 Number of Taxa

151 Distinct Species

1 Unrecognised Taxa

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Crassula helmsii
Crassula helmsii (Kirk) Cockayne
New Zealand Pigmyweed
 
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Hydrocotyle ranunculoides
Hydrocotyle ranunculoides L. f.
Floating Pennywort
 
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Azolla filiculoides
Azolla filiculoides Lam.
Water Fern
 
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Myriophyllum aquaticum
Myriophyllum aquaticum (Vell.) Verdc.
Parrot's-Feather
 
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Lagarosiphon major
Lagarosiphon major (Ridl.) Moss ex V.A. Wager
Curly Waterweed
 
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Ludwigia grandiflora
Ludwigia grandiflora (Michx.) Greuter & Burdet
Water Primrose
 
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Elodea canadensis
Elodea canadensis Michx.
Canadian Waterweed
 
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Hydrilla verticillata
Hydrilla verticillata (L. f.) Royle
Esthwaite Waterweed
 
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Fallopia japonica
Fallopia japonica (Houtt.) Ronse Decr.
Japanese Knotweed
 
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Fallopia sachalinensis
Fallopia sachalinensis (F. Schmidt) Ronse Decr.
Giant Knotweed
 
Action Supplied Name Scientific Name (matched) Image Author (matched) Common Name (matched) Impact
Crassula helmsii Crassula helmsii (Kirk) Cockayne New Zealand Pigmyweed
High
Hydrocotyle ranunculoides Hydrocotyle ranunculoides L. f. Floating Pennywort
High
Azolla filiculoides Azolla filiculoides Lam. Water Fern
High
Myriophyllum aquaticum Myriophyllum aquaticum (Vell.) Verdc. Parrot's-Feather
High
Lagarosiphon major Lagarosiphon major (Ridl.) Moss ex V.A. Wager Curly Waterweed
High
Ludwigia grandiflora Ludwigia grandiflora (Michx.) Greuter & Burdet Water Primrose
High
Elodea canadensis Elodea canadensis Michx. Canadian Waterweed
High
Elodea nuttallii Hydrilla verticillata (L. f.) Royle Esthwaite Waterweed
High
Fallopia japonica Fallopia japonica (Houtt.) Ronse Decr. Japanese Knotweed
High
Fallopia sachalinensis Fallopia sachalinensis (F. Schmidt) Ronse Decr. Giant Knotweed
High
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