Grafton Lock Meadow

Site of Special Scientific Interest · 51.6887, -1.6059

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Oxfordshire County

Condition (Natural England)

Favourable (1)
UnitFeatureConditionArea (ha)Assessed
SU273989 — Favourable 10.68 2012-07-27

Habitats

Fast flowing river and stream, Hedgerow scrub

Geology & landscape

Landscape processes: Fluvial

Description

Description This is an area of unimproved neutral grassland on damp alluvial soils, adjacent to the Thames and subject to regular floods in winter. Unlike most of the pasture land of this area, Grafton Lock Meadow has not been improved with modern inorganic fertilisers and has long been managed traditionally for hay and autumn pasture. This management has produced a wide and diverse range of wild flowers characteristic of old hay meadows such as meadow rue Thalictrum flavum, yellow rattle Rhinanthus minor, meadowsweet Filipendula ulmaria, pepper saxifrage Silaum silaus, cowslip Primula veris, adder's tongue Ophioglossum vulgatum and at least eighteen species of wild grasses dominated by meadow barley Hordeum secalinum and Yorkshire fog Holcus lanatus. Especially notable is a population of the rare and declining snake's head fritillary Fritillaria meleagris which produces between 50 and 200 flower heads annually in two separate areas. The water table of the meadow varies from the wet sedge dominated sward at the southern side to the relatively dry western side. Moderately calcicolous species such as quaking grass Briza media, goat's beard Tragopogon pratensis and lady's bedstraw Galium verum are frequent, especially in the drier parts of the meadow. Further variety is provided by the river bank vegetation, an old hedge along the southern boundary and lines of crack willow trees.

Species mentioned

English name
search for this in other sites		 Latin name
search with Google		 IUCN / Red List Type Family
adders-tongue fern Ophioglossum vulgatum LC fern ophioglossaceae
quaking grass Briza media VU grass poaceae
Yorkshire fog Holcus lanatus LC grass poaceae
meadow barley Hordeum secalinum LC grass poaceae
meadow sweet Filipendula ulmaria LC herb rosaceae
fritillary Fritillaria meleagris Not listed in GB list herb liliaceae
lady's bedstraw Galium verum LC herb rubiaceae
cowslip Primula veris LC herb primulaceae
yellow-rattle Rhinanthus minor DD herb orobanchaceae
pepper saxifrage Silaum silaus EN herb saxifragaceae
common meadow rue Thalictrum flavum LC herb ranunculaceae
goat's-beard Tragopogon pratensis LC herb asteraceae

Plant communities

A9 — Fast flowing river and stream, Marginal and inundation, Pond ditch and canal, Sluggish river and stream

Potamogeton natans community

Schoenoplectus lacustris, Juncus bulbosus, Sparganium angustifolium, Sparganium erectum, Sparganium minimum, Alisma plantago-aquatica, Lobelia dortmanna, Equisetum fluviatile, Myriophyllum alterniflorum, Elodea canadensis, Lemna minor, Lemna trisulca, Nymphaea alba, Callitriche platycarpa, Callitriche stagnalis, Littorella uniflora, Potamogeton natans, Ranunculus trichophyllus, Glyceria fluitans, Chara subspinosa

A14 — Fast flowing river and stream

Myriophyllum alterniflorum community

Isolepis fluitans, Juncus bulbosus, Fontinalis antipyretica, Lobelia dortmanna, Equisetum fluviatile, Myriophyllum alterniflorum, Lemna minor, Callitriche stagnalis, Littorella uniflora, Potamogeton filiformis, Potamogeton gramineus, Potamogeton natans, Ranunculus peltatus, Chara spp., Nitella hyalina

A17 — Chalk river and stream, Fast flowing river and stream

Ranunculus penicillatus ssp. pseudofluitans community

Berula erecta, Nasturtium officinale, Elodea canadensis, Lemna minor, Callitriche stagnalis, Veronica beccabunga, Polygonum amphibium, Polygonum hydropiper, Potamogeton crispus, Potamogeton pectinatus, Ranunculus penicillatus ssp. pseudofluitans

A18 — Fast flowing river and stream

Ranunculus fluitans community

Fontinalis antipyretica, Fontinalis squamosa var. curnowii, Myriophyllum alterniflorum, Myriophyllum spicatum, Elodea canadensis, Mentha aquatica, Lemna gibba, Lemna minor, Potamogeton perfoliatus, Ranunculus fluitans, Glyceria fluitans, Phalaris arundinacea

W21 — Hedgerow scrub, Mixed scrub

Crataegus monogyna-Hedera helix scrub

Hedera helix, Salix cinerea, Acer pseudoplatanus, Ilex aquifolium, Betula pendula, Corylus avellana, Fagus sylvatica, Quercus robur, Fraxinus excelsior, Malus sylvestris, Sorbus aria, Taxus baccata, Ulmus glabra, Ulmus procera, Sambucus nigra, Viburnum lantana, Euonymus europaeus, Cornus sanguinea, Juniperus communis, Ligustrum vulgare, Clematis vitalba, Rhamnus cathartica, Crataegus laevigata, Crataegus monogyna, Prunus spinosa, Juncus effusus, Plagiomnium undulatum, Brachythecium rutabulum, Kindbergia praelonga, Rhynchostegium confertum, Tamus communis, Heracleum sphondylium, Torilis japonica, Arum maculatum, Arctium minus, Cirsium arvense, Lonicera periclymenum, Moehringia trinervia, Silene dioica, Stellaria graminea, Stellaria holostea, Stellaria media agg., Calystegia sepium, Mercurialis perennis, Geranium robertianum, Iris foetidissima, Glechoma hederacea, Lamium purpureum, Origanum vulgare, Stachys sylvatica, Teucrium scorodonia, Allium ursinum, Hyacinthoides non-scripta, Circaea lutetiana, Rumex sanguineus, Anemone nemorosa, Ranunculus repens, Fragaria vesca, Geum urbanum, Potentilla sterilis, Poterium sanguisorba, Rosa arvensis, Rosa canina, Rubia peregrina, Rubus fruticosus agg., Galium aparine, Urtica dioica, Viola riviniana, Anisantha sterilis, Arrhenatherum elatius, Brachypodium pinnatum, Brachypodium sylvaticum, Bromopsis erecta, Dactylis glomerata, Elytrigia repens, Holcus lanatus, Holcus mollis, Poa trivialis, Asplenium scolopendrium, Pteridium aquilinum, Dryopteris filix-mas

W22 — Hedgerow scrub, Mixed scrub

Prunus spinosa-Rubus fruticosus scrub

Hedera helix, Acer campestre, Corylus avellana, Ulex europaeus, Prunus spinosa, Plagiomnium undulatum, Brachythecium rutabulum, Eurhynchium striatum, Kindbergia praelonga, Thuidium tamariscinum, Atrichum undulatum, Lophocolea bidentata, Achillea millefolium, Cardamine flexuosa, Lonicera periclymenum, Moehringia trinervia, Silene dioica, Silene uniflora, Stellaria media agg., Mercurialis perennis, Geranium robertianum, Stachys sylvatica, Teucrium scorodonia, Hyacinthoides non-scripta, Oxalis acetosella, Digitalis purpurea, Plantago lanceolata, Veronica chamaedrys, Armeria maritima, Rumex acetosa, Filipendula ulmaria, Geum urbanum, Rosa canina, Rubus fruticosus agg., Rubus idaeus, Galium aparine, Urtica dioica, Viola riviniana, Agrostis capillaris, Brachypodium sylvaticum, Dactylis glomerata, Festuca rubra, Holcus lanatus, Holcus mollis, Poa trivialis, Asplenium scolopendrium, Pteridium aquilinum, Dryopteris borreri, Dryopteris filix-mas

W23 — Brownfield, Hedgerow scrub

Ulex europaeus-Rubus fruticosus scrub

Hedera helix, Calluna vulgaris, Cytisus scoparius, Ulex europaeus, Kindbergia praelonga, Pseudoscleropodium purum, Rhytidiadelphus squarrosus, Rhytidiadelphus triquetrus, Achillea millefolium, Crepis capillaris, Hypochaeris radicata, Jacobaea vulgaris, Campanula rotundifolia, Jasione montana, Cerastium fontanum, Silene dioica, Teucrium scorodonia, Digitalis purpurea, Plantago lanceolata, Veronica chamaedrys, Veronica officinalis, Rumex acetosa, Rumex acetosella, Potentilla erecta, Rubus fruticosus agg., Rubus idaeus, Galium saxatile, Viola riviniana, Agrostis capillaris, Aira praecox, Anthoxanthum odoratum, Arrhenatherum elatius, Brachypodium sylvaticum, Dactylis glomerata, Deschampsia flexuosa, Festuca rubra, Holcus lanatus, Holcus mollis, Poa pratensis, Pteridium aquilinum