Q61x Iberoatlantic annual river mud communities

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Description

Ephemeral communities of tall short-lived plants growing on nutrient-rich muds (deposited in their margins by rivers draining a large, densely populated by humans or intensively cultivated watershed) emerged during summertime low water.

Protection

Protected by the EU Habitat Directive under the code 3270 ("Rivers with muddy banks with Chenopodion rubri p.p. and Bidention p.p. vegetation").

Floristic Composition

Frequent species

Persicaria hydropiper 63%, Lythrum salicaria 56%, Bidens frondosus 52%, Phalaroides arundinacea 42%, Cyperus eragrostis 42%, Lycopus europaeus 42%, Helosciadium nodiflorum 35%, Rumex obtusifolius 35%, Echinochloa crus-galli 33%, Calystegia sepium 31%, Persicaria lapathifolia 31%, Dysphania ambrosioides 31%, Paspalum distichum 29%, Mentha pulegium 29%, Agrostis stolonifera 27%, Symphyotrichum squamatum 25%, Calamagrostis pseudophragmites 25%, Xanthium orientale 23%, Mentha aquatica 19%, Equisetum arvense 19%, Mentha longifolia 19%, Solanum dulcamara 19%, Persicaria maculosa 19%, Bidens tripartitus 17%, Solanum chenopodioides 17%, Artemisia verlotiorum 17%, Setaria pumila 17%, Erigeron canadensis 17%, Leersia oryzoides 17%, Cyperus longus 15%, Galium palustre 15%, Cladanthus mixtus 15%, Cuscuta campestris 15%, Digitaria sanguinalis 15%, Plantago major 13%, Polypogon viridis 13%, Mentha suaveolens 13%, Plantago lanceolata 13%, Galinsoga quadriradiata 13%, Lotus pedunculatus 13%, Veronica beccabunga 10%, Veronica anagallis-aquatica 10%, Setaria parviflora 10%, Rumex pulcher 10%, Echium rosulatum 10%, Setaria faberi 8%, Poa annua 8%, Potentilla reptans 8%, Scrophularia auriculata 8%, Holcus lanatus 8%, Corrigiola litoralis 8%, Panicum dichotomiflorum 8%, Eupatorium cannabinum 8%, Gnaphalium uliginosum 8%, Erucastrum nasturtiifolium 6%, Epilobium parviflorum 6%, Elytrigia repens 6%, Elymus caninus 6%, Coleostephus myconis 6%, Paspalum dilatatum 6%, Lysimachia vulgaris 6%, Salix triandra 6%, Lythrum portula 6%, Rorippa sylvestris 6%, Rorippa palustris 6%, Ranunculus repens 6%, Oenanthe crocata 6%, Panicum repens 6%, Chamaemelum nobile 6%

Phytosociology

  • Bidenti tripartitae-Polygonetum lapathifolii
  • Filaginello uliginosae-Bidentetum tripartitae
  • Xanthio italici-Polygonetum persicariae

Relations with other habitat types

These communities may eventually be outcompeted by Q51x, unless the frequency of sufficiently violent floods becomes too high. EUNIS stopping at level III, a regional level IV was created for the sake of consistency.

Regional distribution

Known occurrences and potential area of occupancy of the habitat type in the study region.

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Citation: IBEROATLANTICA – Flora and Habitats of the Cantabrian Mixed Forests ecoregion.
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