Black Cart

Site of Special Scientific Interest · 55.8777, -4.4400

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Renfrewshire County

Condition (NatureScot)

Unfavourable Declining (1)
UnitFeatureConditionArea (ha)Assessed
F1 Whooper swan (Cygnus cygnus), non-breeding Unfavourable Declining — 2024-07-16

Habitats

Arable

Geology & landscape

Geological Feature: Floodplain

Landscape processes: Fluvial

Birds & fish recorded

Birds

SpeciesSeason
whooper swan Breeding
whooper swan Roosting
whooper swan Wintering

Description

Black Cart The Black Cart, lying directly north of Glasgow Airport, is of international importance as a roosting and foraging area for a population of wintering Icelandic whooper swans, Cygnus cygnus. The site represents the main roost site at the heart of the population’s local range along the tidal length of the Black Cart Water and on the agriculturally improved areas of its floodplain. During the winters of 1993/94 to 1997/98 the site served as the main roost and early feeding area for an average maximum of 207 individuals. This represents almost 4% of the British wintering population of 5,600 whooper swans and just over 1% of the biogeographical population of 16,000 Icelandic whooper swans. During the winter birds disperse from their main roost sites on the Black Cart to feed in neighbouring agricultural areas. However in severe weather the Black Cart acts as a refuge for the swans, where plants and algae growing in the unfrozen, brackish water provide the only available forage. The notified stretch of the Black Cart Water supports abundant submerged aquatic vegetation typical of brackish conditions. The area of surrounding floodplain within the site is mostly improved and semi-improved pasture but includes small creeks, stands of common reed and areas of rush dominated marshy grassland. The wider agricultural land surrounding the site, used as a foraging area by the swans, is mixed arable (mainly winter barley, winter wheat and potatoes) and pasture. Icelandic whooper swans Cygnus cygnus (non-breeding)

Species mentioned

English name
search for this in other sites		 Latin name
search with Google		 IUCN / Red List Type Family
whooper swan Cygnus cygnus LC (NonBreeding), EN (Breeding) bird-swan anatidae

Plant communities

OV3 — Arable, Open habitat arable weed less fertile acid, Pond ditch and canal

Papaver rhoeas-Viola arvensis community

Bryum erythrocarpum, Phascum cuspidatum, Heracleum sphondylium, Achillea millefolium, Anthemis arvensis, Artemisia vulgaris, Cirsium arvense, Eupatorium cannabinum, Matricaria discoidea, Pulicaria dysenterica, Senecio vulgaris, Sonchus asper, Sonchus oleraceus, Taraxacum officianalis, Tripleurospermum inodorum, Anchusa arvensis, Myosotis arvensis, Arabidopsis thaliana, Capsella bursa-pastoris, Descurainia sophia, Sisymbrium officinale, Valerianella locusta, Arenaria leptoclados, Arenaria serpyllifolia, Silene latifolia, Spergula arvensis, Stellaria media agg., Chenopodium album, Convolvulus arvensis, Medicago lupulina, Trifolium repens, Vicia sativa, Geranium dissectum, Epilobium hirsutum, Papaver argemone, Papaver dubium, Veronica arvensis, Veronica persica, Veronica triphyllos, Fallopia convolvulus, Polygonum aviculare, Rumex crispus, Anagallis arvensis, Aphanes microcarpa, Galium aparine, Urtica dioica, Viola arvensis, Agrostis stolonifera, Elytrigia repens, Poa annua, Poa trivialis, Chara vulgaris

OV4 — Arable

Chrysanthemum segetum-Spergula arvensis community

Bryum rubens, Daucus carota, Artemisia vulgaris, Bellis perennis, Cirsium arvense, Cirsium vulgare, Crepis capillaris, Filaginella uliginosa, Glebionis segetum, Matricaria discoidea, Senecio vulgaris, Sonchus asper, Taraxacum officianalis, Tripleurospermum inodorum, Anchusa arvensis, Myosotis arvensis, Brassica rapa, Capsella bursa-pastoris, Lepidium didymum, Raphanus raphanistrum, Cerastium fontanum, Cerastium glomeratum, Spergula arvensis, Stellaria media agg., Euphorbia helioscopia, Trifolium dubium, Trifolium repens, Vicia sativa, Fumaria muralis, Geranium dissectum, Galeopsis tetrahit, Lamium purpureum, Stachys arvensis, Plantago major, Veronica agrestis, Veronica arvensis, Fallopia convolvulus, Persicaria maculosa, Polygonum aviculare, Rumex acetosella, Rumex crispus, Anagallis arvensis, Ranunculus repens, Potentilla anserina, Misopates orontium, Solanum nigrum, Viola arvensis, Agrostis capillaris, Agrostis stolonifera, Dactylis glomerata, Elytrigia repens, Holcus lanatus, Lolium multiflorum, Lolium perenne, Poa annua, Poa trivialis

OV7 — Arable, Open habitat arable weed fertile loam and clay

Veronica persica-Veronica polita community

Aethusa cynapium, Cirsium arvense, Conyza canadensis, Matricaria discoidea, Senecio vulgaris, Sonchus asper, Sonchus oleraceus, Tripleurospermum inodorum, Capsella bursa-pastoris, Diplotaxis muralis, Erucastrum gallicum, Lepidium coronopus, Sisymbrium officinale, Thlaspi arvense, Stellaria media agg., Atriplex patula, Atriplex prostrata, Chenopodium album, Euphorbia helioscopia, Euphorbia peplus, Lamium amplexicaule, Lamium hybridum, Lamium purpureum, Plantago lanceolata, Plantago major, Veronica persica, Veronica polita, Fallopia convolvulus, Polygonum aviculare, Anagallis arvensis, Ranunculus repens, Galium aparine, Solanum nigrum, Urtica urens, Viola arvensis, Agrostis stolonifera, Avena fatua, Elytrigia repens, Poa annua, Aphanes arvensis, Chara vulgaris

OV8 — Arable, Open habitat arable weed fertile loam and clay

Veronica persica-Alopecurus myosuroides community

Aethusa cynapium, Anthemis cotula, Cirsium arvense, Lapsana communis, Matricaria chamomilla, Matricaria discoidea, Senecio vulgaris, Sonchus arvensis, Sonchus asper, Sonchus oleraceus, Tripleurospermum inodorum, Capsella bursa-pastoris, Lepidium coronopus, Sinapis arvensis, Sisymbrium officinale, Stellaria media agg., Atriplex patula, Atriplex prostrata, Chenopodium album, Chenopodium hybridum, Convolvulus arvensis, Euphorbia helioscopia, Euphorbia peplus, Trifolium repens, Geranium dissectum, Lamium purpureum, Plantago major, Veronica persica, Fallopia convolvulus, Persicaria maculosa, Polygonum aviculare, Rumex crispus, Galium aparine, Solanum nigrum, Urtica dioica, Urtica urens, Alopecurus myosuroides, Avena fatua, Elytrigia repens, Poa annua, Chara vulgaris

OV9 — Arable, Open habitat arable weed fertile loam and clay

Matricaria perforata-Stellaria media community

Juncus bufonius, Bryum rubens, Dicranella staphylina, Kindbergia praelonga, Barbula unguiculata, Phascum cuspidatum, Tortula intermedia, Riccia sorocarpa, Artemisia vulgaris, Cirsium arvense, Crepis capillaris, Filaginella uliginosa, Glebionis segetum, Lapsana communis, Matricaria discoidea, Senecio vulgaris, Sonchus arvensis, Sonchus asper, Taraxacum officianalis, Tripleurospermum maritimum, Tussilago farfara, Anchusa arvensis, Myosotis arvensis, Capsella bursa-pastoris, Raphanus raphanistrum, Sisymbrium officinale, Cerastium fontanum, Stellaria media agg., Atriplex patula, Atriplex prostrata, Chenopodium album, Equisetum arvense, Mercurialis annua, Trifolium pratense, Trifolium repens, Fumaria officinalis, Geranium molle, Galeopsis tetrahit, Lamium hybridum, Lamium purpureum, Chamerion angustifolium, Epilobium montanum, Papaver dubium, Plantago lanceolata, Plantago major, Veronica arvensis, Veronica persica, Fallopia convolvulus, Persicaria maculosa, Polygonum arenastrum, Polygonum aviculare, Rumex acetosella, Rumex crispus, Rumex obtusifolius, Anagallis arvensis, Ranunculus arvensis, Potentilla anserina, Sherardia arvensis, Misopates orontium, Solanum nigrum, Urtica dioica, Viola arvensis, Agrostis capillaris, Agrostis stolonifera, Anisantha sterilis, Arrhenatherum elatius, Dactylis glomerata, Elytrigia repens, Holcus lanatus, Holcus mollis, Hordeum vulgare, Lolium perenne, Poa annua, Poa trivialis, Aphanes arvensis, Chara vulgaris

OV10 — Arable, Open habitat arable weed fertile loam and clay

Poa annua-Senecio vulgaris community

Bryum argenteum, Heracleum sphondylium, Achillea millefolium, Anthemis cotula, Arctium minus, Cirsium arvense, Cirsium vulgare, Jacobaea vulgaris, Lapsana communis, Leucanthemum vulgare, Matricaria chamomilla, Matricaria discoidea, Senecio squalidus, Senecio vulgaris, Sonchus asper, Sonchus oleraceus, Taraxacum officianalis, Tripleurospermum inodorum, Tussilago farfara, Myosotis arvensis, Alliaria petiolata, Capsella bursa-pastoris, Erophila verna, Lepidium coronopus, Raphanus raphanistrum, Sinapis arvensis, Cerastium fontanum, Spergula arvensis, Stellaria media agg., Atriplex prostrata, Chenopodium album, Euphorbia exigua, Euphorbia helioscopia, Medicago lupulina, Trifolium pratense, Trifolium repens, Vicia sativa, Fumaria officinalis, Eriodium cicutarium, Lamium hybridum, Lamium purpureum, Chamerion angustifolium, Plantago lanceolata, Plantago major, Plantago media, Veronica arvensis, Veronica chamaedrys, Veronica persica, Veronica polita, Fallopia convolvulus, Persicaria maculosa, Polygonum arenastrum, Polygonum aviculare, Rumex acetosa, Rumex crispus, Rumex obtusifolius, Anagallis arvensis, Ranunculus repens, Galium aparine, Urtica dioica, Urtica urens, Viola arvensis, Agrostis capillaris, Agrostis stolonifera, Anisantha sterilis, Dactylis glomerata, Elytrigia repens, Festuca ovina, Holcus lanatus, Lolium perenne, Poa annua, Poa pratensis, Poa trivialis, Aphanes arvensis

OV11 — Arable, Open habitat arable weed fertile loam and clay

Poa annua-Stachys arvensis community

Bryum erythrocarpum, Dicranella staphylina, Pleuridium subulatum, Brachythecium rutabulum, Kindbergia praelonga, Tortula truncata, Daucus carota, Glebionis segetum, Matricaria discoidea, Scorzoneroides autumnalis, Senecio sylvaticus, Senecio vulgaris, Sonchus arvensis, Sonchus asper, Taraxacum officianalis, Tripleurospermum inodorum, Capsella bursa-pastoris, Lepidium didymum, Sinapis arvensis, Cerastium fontanum, Cerastium glomeratum, Spergula arvensis, Stellaria media agg., Atriplex patula, Chenopodium album, Euphorbia exigua, Euphorbia helioscopia, Trifolium dubium, Trifolium repens, Fumaria bastardii, Fumaria muralis, Geranium dissectum, Lamium purpureum, Stachys arvensis, Kickxia elatine, Plantago lanceolata, Plantago major, Veronica arvensis, Veronica persica, Fallopia convolvulus, Persicaria maculosa, Polygonum aviculare, Polygonum lapathifolium, Rumex crispus, Rumex obtusifolius, Anagallis arvensis, Ranunculus repens, Aphanes microcarpa, Potentilla anserina, Sherardia arvensis, Misopates orontium, Solanum nigrum, Viola arvensis, Agrostis capillaris, Agrostis stolonifera, Elytrigia repens, Holcus lanatus, Lolium perenne, Poa annua, Poa trivialis, Aphanes arvensis

OV13 — Arable, Open habitat arable weed fertile loam and clay

Stellaria media-Capsella bursa-pastoris community

Arctium minus, Cirsium arvense, Cirsium vulgare, Matricaria discoidea, Senecio vulgaris, Sonchus arvensis, Sonchus asper, Sonchus oleraceus, Tripleurospermum inodorum, Tripleurospermum maritimum, Brassica napus, Capsella bursa-pastoris, Lepidium coronopus, Sinapis arvensis, Sisymbrium officinale, Thlaspi arvense, Spergula arvensis, Stellaria media agg., Atriplex patula, Atriplex prostrata, Chenopodium album, Chenopodium bonus-henricus, Chenopodium rubrum, Chenopodium urbicum, Calystegia sepium, Convolvulus arvensis, Euphorbia helioscopia, Euphorbia peplus, Mercurialis annua, Trifolium repens, Fumaria bastardii, Fumaria muralis, Geranium dissectum, Lamium album, Lamium hybridum, Lamium purpureum, Plantago major, Veronica agrestis, Veronica persica, Veronica polita, Fallopia convolvulus, Persicaria maculosa, Polygonum aviculare, Polygonum lapathifolium, Rumex crispus, Rumex obtusifolius, Galium aparine, Solanum nigrum, Urtica dioica, Urtica urens, Agrostis stolonifera, Alopecurus myosuroides, Anisantha sterilis, Avena fatua, Elytrigia repens, Lolium perenne, Poa annua, Poa pratensis, Chara vulgaris