Scientific name Agrostis stolonifera – Potentilla anserina saltmarsh
Common name Creeping Bent – Silverweed saltmarsh
Community code SM6C

 

SM6C map: Agrostis stolonifera – Potentilla anserina saltmarsh

Download full pdf synopsis: SM6C

 

Vegetation

This variable community is typically dominated by a combination of Potentilla anserina, Agrostis stolonifera and Juncus gerardii. Glaux maritima and Leontodon autumnalis are frequently found, while Trifolium repens and Lotus corniculatus are occasional. Less frequently, one will find species indicative of freshwater conditions such as Carex nigra and Hydrocotyle vulgaris.

 

Ecology

This is a transitional community of the landward fringe of upper saltmarshes and marshes next to lagoons. It is seldom inundated and there is often some freshwater influence making conditions brackish.

 

Sub-communities

No sub-communities have been described for this community.

 

Similar communities

This community differs from other saltmarsh types in the abundance of Potentilla anserina. It has some similarities to GL1B Agrostis stolonifera – Filipendula ulmaria marsh-grassland and GL2A Agrostis stoloniferaRanunculus repens marsh-grassland but those communities are distinctly freshwater in nature and lack the halophytes found in this current assemblage.

 

Conservation value

Examples of this vegetation supporting saltmarsh indicators such as Juncus gerardii and Glaux maritima should qualify as EU HD Annex I habitat 1330 Atlantic salt meadows. It is typically a species-poor community. Centaurium pulchellum is a nationally rare species listed on the Floral Protection Order.

 

Management

The main threat to this saltmarsh community is probably grazing by livestock. Sea-level rises as a result of climate change could potentially have an impact, particularly in areas susceptible to coastal squeeze.