S412 Southern wet heaths
Description
Heaths of Erica tetralix with Genista anglica s.l. and other endemic hygrophilous congeners like G. micrantha on almost permanently waterlogged soils, often fringing bogs (@Q1) or fens (@Q2), or alternating with them in a dynamic mosaic mediated by the enhanced mineralization of peat, and consequent depression, in the hummocks colonised by the heath. EUNIS, in the definition of S411 (“Northern wet heaths), indicates that of such unit replaces the more general S412 in the most humid, central areas of northwestern Iberian wet heaths. Nonetheless, this distinction is hardly operative, and we prefer to admit one sinlge unit, at least at level IV.
Floristic Composition
Frequent species
Erica tetralix
0.87,
Calluna vulgaris
0.87,
Potentilla erecta
0.77,
Genista anglica aggr.
0.48,
Nardus stricta
0.47,
Juncus squarrosus
0.46,
Genista micrantha
0.45,
Molinia caerulea
0.25,
Agrostis capillaris
0.22,
Erica vagans
0.22,
Danthonia decumbens
0.22,
Vaccinium myrtillus
0.22,
Ulex minor aggr.
0.21,
Carex binervis
0.2,
Trocdaris verticillatum
0.18,
Gentiana pneumonanthe
0.17,
Helictochloa marginata
0.15,
Agrostis curtisii
0.14,
Succisa pratensis
0.14,
Euphorbia polygalifolia
0.14,
Carex echinata
0.14,
Agrostis hesperica
0.14,
Daboecia cantabrica
0.14,
Juncus acutiflorus
0.13,
Anthoxanthum odoratum
0.13,
Luzula multiflora
0.12,
Trichophorum cespitosum
0.12,
Dactylorhiza maculata aggr.
0.12,
Halimium alyssoides
0.11,
Serratula tinctoria
0.11,
Festuca rubra
0.1,
Drosera rotundifolia
0.1,
Juniperus communis
0.1,
Lotus corniculatus
0.1,
Avenella flexuosa
0.1,
Pilosella officinarum
0.09,
Parnassia palustris
0.09,
Juncus effusus
0.08,
Deschampsia cespitosa aggr.
0.07,
Erica cinerea
0.07,
Erica arborea
0.07,
Carex nigra
0.07,
Holcus lanatus
0.07,
Briza media
0.07,
Luzula campestris
0.07,
Vaccinium uliginosum
0.06,
Festuca rothmaleri
0.06,
Viola palustris
0.06,
Carex pilulifera
0.06,
Arnica montana
0.06,
Carex flacca
0.06,
Galium saxatile
0.05,
Achillea millefolium
0.05,
Lotus pedunculatus
0.05
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Indicator species
Erica tetralix 0.86
,
Potentilla erecta 0.68
,
Calluna vulgaris 0.66
,
Genista anglica aggr. 0.47
,
Juncus squarrosus 0.46
,
Nardus stricta 0.44
,
Genista micrantha 0.44
,
Molinia caerulea 0.23
,
Carex binervis 0.19
,
Danthonia decumbens 0.18
,
Trocdaris verticillatum 0.17
,
Gentiana pneumonanthe 0.16
,
Carex echinata 0.14
,
Succisa pratensis 0.13
,
Agrostis hesperica 0.13
,
Juncus acutiflorus 0.13
,
Agrostis capillaris 0.13
,
Euphorbia polygalifolia 0.12
,
Luzula multiflora 0.12
,
Trichophorum cespitosum 0.12
,
Dactylorhiza maculata aggr. 0.12
,
Drosera rotundifolia 0.1
,
Anthoxanthum odoratum 0.09
,
Serratula tinctoria 0.09
,
Parnassia palustris 0.09
,
Juncus effusus 0.08
,
Helictochloa marginata 0.08
,
Carex nigra 0.07
,
Luzula campestris 0.07
,
Festuca rubra 0.06
,
Arnica montana 0.06
,
Deschampsia cespitosa aggr. 0.06
,
Festuca rothmaleri 0.05
,
Pilosella officinarum 0.05
,
Briza media 0.05
,
Lotus pedunculatus 0.05
,
Holcus lanatus 0.05
,
Festuca rivularis 0.05
,
Carex lepidocarpa aggr. 0.05
,
Carex panicea 0.05
,
Carex pilulifera 0.04
,
Achillea millefolium 0.04
,
Narthecium ossifragum 0.04
,
Juncus conglomeratus 0.04
,
Viola palustris 0.04
,
Pedicularis sylvatica 0.04
,
Thymus pulegioides aggr. 0.04
,
Carex flacca 0.04
,
Genista pilosa 0.03
,
Meum athamanticum 0.03
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Regional distribution
