FW2K Zannichellia palustris aquatic community


  • Freshwater habitats (FW)
  • FW2 Ranunculus pencillatus – Fontinalis antipyretica group
  • FW2K Zannichellia palustris aquatic community
Scientific name:
Zannichellia palustris aquatic community
Common name:
Horned Pondweed aquatic community
Community code:
FW2K

FW2K Zannichellia palustris aquatic community

Vegetation

This is a simple, submerged aquatic community characterised by the presence of the perennial Zannichellia palustris. Often it is the sole vascular component, but occasionally one can find some pondweed (Potamogeton berchtoldii, Potamogeton crispus), Elodea canadensis or Myriophyllum spicatum. Ruppia occurs only rarely. Stoneworts recorded from this community include Chara aspera, Chara rudis, Chara virgata and Chara vulgaris.

Ecology

This community has largely been recorded from lagoons and mesotrophic lakes.

Sub-communities

No sub-communities are currently described.

Similar communities

Zannichellia palustris can also occur in the SW1A Ruppia maritima/cirrhosa lagoon community, but there it will be subordinate to the Ruppia.

Conservation value

Samples have been recorded from lagoons which correspondent with the priority EU HD Annex I habitat 1150 Lagoons*. Elodea canadensis is an invasive non-native species found in this community but it is not considered a major ecological threat and has already colonised much of its suitable niche in Ireland. Vascular plant diversity is low.

Management

This community is typically unmanaged but is threatened by impacts which affect lagoons and lakes, including drainage for purposes of agricultural reclamation, natural siltation and eutrophication.

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