N133 Coastal dunes: white dunes (sensu stricto)
Description
Grasslands dominated by Ammophila arenaria in somewhat fixed, inner areas of maritime sand dune systems.
Protection
Protected under the code 2120 ("Shifting dunes along the shoreline with Ammophila arenaria ['white dunes']") by the EU Habitat Directive.Floristic Composition
Frequent species
Ammophila arenaria
100%,
Eryngium maritimum
83%,
Calystegia soldanella
71%,
Euphorbia paralias
64%,
Elytrigia juncea
53%,
Thrincia saxatilis aggr.
44%,
Festuca juncifolia
41%,
Pancratium maritimum
20%,
Lagurus ovatus
17%,
Carex arenaria
16%,
Crucianella maritima
14%,
Linaria supina
13%,
Achillea maritima
12%,
Cutandia maritima
10%,
Medicago marina
9%,
Honckenya peploides
9%,
Sonchus oleraceus
8%,
Marcus-kochia littorea
8%,
Helichrysum stoechas
7%,
Koeleria pyramidata
7%,
Linaria polygalifolia
7%,
Sonchus bulbosus
7%,
Hypochaeris radicata
7%,
Medicago littoralis
7%,
Reichardia gaditana
6%,
Cynodon dactylon
6%,
Oenothera biennis
6%,
Polygonum maritimum
6%,
Cakile maritima
5%,
Rumex bucephalophorus
5%,
Matthiola sinuata
5%
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Indicator species
Ammophila arenaria 0.99,
Eryngium maritimum 0.55,
Calystegia soldanella 0.52,
Euphorbia paralias 0.5,
Festuca juncifolia 0.39,
Thrincia saxatilis aggr. 0.37,
Pancratium maritimum 0.15,
Lagurus ovatus 0.13,
Linaria supina 0.12,
Achillea maritima 0.11,
Carex arenaria 0.1,
Crucianella maritima 0.09,
Cutandia maritima 0.09,
Medicago marina 0.08,
Marcus-kochia littorea 0.07,
Linaria polygalifolia 0.07,
Sonchus bulbosus 0.06,
Reichardia gaditana 0.06,
Oenothera biennis 0.05,
Medicago littoralis 0.05,
Sonchus oleraceus 0.05,
Matthiola sinuata 0.05,
Erigeron canadensis 0.04,
Artemisia campestris 0.04,
Helichrysum serotinum 0.04,
Rumex bucephalophorus 0.04,
Hypochaeris radicata 0.04,
Andryala integrifolia 0.04,
Silene littorea 0.03,
Erigeron acris 0.03,
Corynephorus canescens 0.03,
Euphorbia polygonifolia 0.03,
Scrophularia canina 0.02,
Pteridium aquilinum 0.02,
Catapodium marinum 0.02,
Jacobaea vulgaris 0.02,
Iberis procumbens 0.02,
Euphorbia portlandica 0.02,
Blackstonia perfoliata 0.01,
Polycarpon tetraphyllum 0.01,
Erodium cicutarium aggr. 0.01,
Jasione maritima 0.01,
Ononis natrix 0.01,
Silene scabriflora 0.01,
Glaucium flavum 0.01,
Vulpia alopecuros 0.01,
Polypogon maritimus 0.01,
Cyperus capitatus 0.01,
Anagallis arvensis 0.01,
Bellis perennis 0.01
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Phytosociology
- Otantho maritimi-Ammophiletum australis
Relations with other habitat types
These grasslands are taller and denser than those in N131, which they end up replacing after a sufficiently long period without storm disturbances, thus typically occupying a more inland position. The rhizomes and roots of Ammohila contribute to the fixation of sand.
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Regional distribution
Known occurrences and potential area of occupancy of the habitat type in the study region.
