Whittlesford - Thriplow Hummocky Fields

Site of Special Scientific Interest · 52.1179, 0.1176

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Cambridgeshire County

Condition (Natural England)

Unfavourable Declining (1) Favourable (3)
UnitFeatureConditionArea (ha)Assessed
TL427463 — Unfavourable Declining 7.88 2015-03-31
TL448487 — Favourable 28.0 2015-03-31
TL452490 — Favourable 1.39 2015-08-25
TL453486 — Favourable 18.0 2015-03-31

Habitats

Arable

Geology & landscape

Landscape processes: Glacial

Birds & fish recorded

Birds

SpeciesSeason
redshank Unknown

Description

Area, 47.74 hectares 117.99 ac Description Fields at Whittlesford and Thriplow have a combination of local topography and agricultural practice which provides a suitable habitat for the nationally rare species grass poly Lythrum hyssopifolia. This species is now confined in mainland Britain to a small area of south Cambridgeshire where it occurs locally in shallow depressions in arable fields, together with a number of scarce bryophytes. The occurrence of the nationally uncommon fairy shrimp Chirocephalus diaphanus, in some of the hollows, adds to the importance of the site. The depressions in which grass poly occurs are a result of the melting of ice lenses after the last glaciation. They support a characteristic assemblage of plant species including grass poly, toad rush Juncus bufonius, greater plantain Plantago major ssp. intermedia, knotgrass Polygonum aviculare, redshank P. persicaria and the very local tasteless water pepper P. mite. The uncommon liverworts Riccia cavernosa, R. warnstorfii and Riccia subbifurca are also present. Both flooding and ploughing are essential in maintaining this specialised community and so the depth of the depressions is a crucial factor. The fairy shrimp is also present. It is an uncommon crustacean which occurs in temporary fresh water pools where predators are absent. The extremely drought resistant eggs of this species enable it to survive during periods when the pools are dry. The fairy shrimp has shown a marked decline infrequency during this century, probably as a result of improved drainage and infilling of seasonal pools.

Species mentioned

English name
search for this in other sites		 Latin name
search with Google		 IUCN / Red List Type Family
redshank Tringa totanus EN (NonBreeding) bird-wader scolopacidae
fairy shrimp Chirocephalus diaphanus Not listed in GB list crustacean chirocephalidae
grass poly Lythrum hyssopifolia LC herb lythraceae
greater plantain Plantago major LC herb plantaginaceae
knotgrass Polygonum aviculare LC herb polygonaceae
cavernous crystalwort Riccia cavernosa LC liverwort marchantiales
least crystalwort Riccia subbifurca DD, LC liverwort marchantiales
toad rush Juncus bufonius LC rush juncaceae

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