Scientific name Potamogeton natans – Equisetum fluviatile aquatic community
Common name Broad-leaved Pondweed – Water Horsetail aquatic community
Community code FW3J


FW3J map: Potamogeton natans – Equisetum fluviatile aquatic community

Download full pdf synopsis: FW3J



Potamogeton natans is the only constant of this quite variable aquatic community and is usually a modest dominant. Occasionally found floating beside the pondweed are patches of Lemna minor or pads of Nymphaea alba. In an emergent element, Equisetum fluviatile and Phragmites australis are both frequent while Menyanthes trifoliata, Hippuris vulgaris, Mentha aquatica, Eleocharis palustris and Apium nodiflorum occur less often.



This community occurs in mesotrophic, fairly base-rich waters in lakes, lagoons and turloughs.



No sub-communities are currently described.


Similar communities

This community is closely related to the FW3A Nymphaea alba – Phragmites australis aquatic community, but can be differentiated on the contrasting frequencies and abundancies of Potamogeton natans and Nymphaea alba.


Conservation value

This is species-poor aquatic community. Samples have been recorded from lagoons which correspondent with the priority EU HD Annex I habitat 1150 Lagoons*. Samples from turlough basins correspond to priority habitat 3180 Turloughs*.



This is an unmanaged community. The main threat would appear to be eutrophication.