s A Field Guide to the British Seaweeds - NMBAQC

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SUMMARY OF SPECIES Species List General Morphology General Location on the shore Greens Blidingia sp. Bryopsis plumosa Chaetomorpha linum Chaetomorpha mediterranea Chaetomorpha melagonium Cladophora albida Cladophora rupestris Cladophora sericea Enteromorpha sp. Monostroma grevillei Rhizoclonium tortuosum Spongomorpha arcta Green mat, spongy, foliose but may appear filamentous Fine feather like, very delicate, often quite small Bright green, resembling thin curly garden wire or wire wool Very curly, looks like thin wool, often present in dense patches Consist of a solitary robust strand, with obvious cells appearing beaded Filamentous, highly branched, light green in colour Filamentous, highly branched can be tufted, dark green and slightly coarse Filamentous, highly branched can be tufted, light green Foliose and tubular, often ribbon shaped, may be crinkly, very green Very thin, wide, foliose and membranous, pale green, easily torn Thin, filamentous and branched, forming dense green mats Filamentous, highly branched, light green in colour quite tufted Generally found on the upper shore on rock surface or lower on Fucus fronds Found on the mid shore in rock pools, may be hard to find Found on mid to upper shore on rock surface or in very shallow pools also on mud in estuaries Found on mid to upper shore, often tangled around other species Found in sandy bottomed rock pools on the mid shore Found throughout the intertidal in numerous habitats, often epiphytic Found throughout the intertidal in numerous habitats Found throughout the intertidal in numerous habitats Found throughout the intertidal but very common on upper shore and around freshwater Found most frequently on upper shore (commonest in spring) on rock surface or rock pools Found on upper shore particularly on open rock surfaces and harbour walls Found mid littoral often as part of mat as turf forming species Sykidion moorei Unicellular, single large round cell Found in Blidingia sp. Ulothrix sp Fine, filamentous, green and unbranched Ulva lactuca Foliose, with wide blade looks like lettuce leaf and very green Found mainly on mid and upper shore rocky surfaces, often growing on Fucus sp. Found throughout the littoral down to lower littoral fringe Reduced species list identification guide as required by the Water Framework Directive. 40
Browns Alaria esculenta Ascophyllum nodosum Asperococcus fistulosus Chorda filum Chordaria flagelliformis Cladostephus spongious Desmarestia aculeata Dictyosiphon foeniculaceus Dictyota dichotoma Ectocarpus sp. Elachista fucicola Fucus serratus Fucus spiralis Fucus vesiculosus Halidrys siliquosa Himanthalia elongata Laminaria digitata Laminaria hyperborea Up to 2 m long, with distinct midrib and wide, frilly, easily torn blade Large and cartilaginous with regular air bladders along frond Ribbon-like, foliose, hollow and tubular with rough frond surface Long and rope-like, completely unbranched, cartilaginous Filiform and branched covered with tiny hairs, may be gelatinous Coarse, highly branched and tufted, looks like pipe cleaner Filiform, branched often short and spine like with serrated appearance Found on lower littoral in subtidal fringe on wave exposed areas Found in mid to upper littoral areas but is generally typical of sheltered shores Found in the mid littoral in wide shallow rock pools with sandy bottom; also in sheltered shallow sublittoral Found mainly in mid littoral in wide shallow rock pools with sandy bottom Found mainly in mid littoral in wide shallow rock pools with sandy bottom Found throughout intertidal mainly in overhangs, damp places and turfs/mats; common in sandy areas Found mainly in mid littoral in wide shallow rock pools with sandy bottom Filiform and branched covered with tiny Found mainly in mid littoral in wide hairs not gelatinous shallow rock pools with sandy bottom Thin membranous and foliose, with distinct Frond on mid to lower littoral, mainly in dichotomous branching rockpools of various sizes Fine, filamentous, highly branched and Found growing throughout littoral, often often tangled into loose cords on sandy areas and attached to other algae Small, filamentous, unbranched and tufted, Found throughout the littoral growing brush-like Cartilaginous, with midrib and frond edge epiphytically on Fucus sp. serrated Grows mainly on lower littoral Cartilaginous, with midrib and frond spirally twisted Cartilaginous, with bladders in pairs either side of midrib, no. of bladders varies with Grows mainly in upper littoral degree of exposure Grows mainly in mid littoral Cartilaginous, with pod-shaped air bladders Found in deep rockpools on mid to lower and zig-zag branching littoral Cartilaginous, rope-like but flat, branched Found on open rock platforms mainly on with distinct button holdfast Large, cartilaginous, claw holdfast, wide lower littoral divided frond with smooth flexible stipe Found in littoral/subtidal fringe Large, cartilaginous, claw holdfast, stiff stipe covered in epiphytes with wide divided frond Found in littoral/subtidal fringe Reduced species list identification guide as required by the Water Framework Directive. 41
Page 1 and 2: A Field Guide to the British Seawee
Page 3 and 4: INTRODUCTION The EU Water Framework
Page 5 and 6: - Turfs of mixed species including
Page 7 and 8: Some species have distinct vertical
Page 9 and 10: Table 1: Field sampling sheet to re
Page 11 and 12: Table 2: Species lists for each of
Page 13 and 14: The varieties of algae forms are br
Page 15 and 16: Special features that need to be co
Page 17 and 18: • Reproductive structures - these
Page 19 and 20: Axial cell • Distal- Towards the
Page 21 and 22: A FIELD KEY TO THE BRITISH SEAWEEDS
Page 23 and 24: Rhodophyta The red algae exhibit a
Page 25 and 26: Group A 1. Plants completely flatte
Page 27 and 28: Phaeophyta Species Group A Plants a
Page 29 and 30: 8. Thallus consisting of a large wi
Page 31 and 32: Group D 1. Plant dichotomously bran
Page 33 and 34: Group A 1. Plant calcareous……
Page 35 and 36: 10. Plant completely flattened ofte
Page 37 and 38: 11. Plant black and wiry with disc-
Page 39: 3. Plant generally found attached t
Page 43 and 44: Ceramium nodulosum Ceramium shuttle
Page 45 and 46: Polysiphonia fucoides Polysiphonia
Page 47 and 48: Blidingia sp. This is a tubular and
Page 49 and 50: Chaetomorpha linum This is an unbra
Page 51 and 52: Chaetomorpha melagonium This is an
Page 53 and 54: Enteromorpha sp. A tubular plant wh
Page 55 and 56: Rhizoclonium tortuosum Plant consis
Page 57 and 58: Sykidion moorei Plant consisting of
Page 59: Ulva lactuca A flat foliose plant t
Page 62 and 63: Ascophyllum nodosum Frond very long
Page 64 and 65: Chordaria flagelliformis Plant ofte
Page 66 and 67: Desmarestia aculeata Frond often qu
Page 68 and 69: Ectocarpus sp. Fine filamentous for
Page 70 and 71: Fucus sp. Plants tough, cartilagino
Page 72 and 73: Laminaria sp. Thick leathery, very
Page 74 and 75: Litosiphon laminariae Epiphytic pla
Page 76 and 77: Pilayella littoralis Fine filamento
Page 78 and 79: Scytosiphon lomentaria Plant charac
Page 80 and 81: Spongonema tomentosum Fine and fila
Page 82 and 83: Ahnfeltia plicata Plant completely
Page 84 and 85: Calcareous encrusters Calcareous en
Page 86 and 87: Ceramium nodulosum This is a highly
Page 88 and 89: Chondrus crispus This species is ca
Page 90 and 91:
Cystoclonium purpureum This is a fi
Page 92 and 93:
Erythrotrichia carnea This is a sma
Page 94 and 95:
Gelidium sp. Gracilaria gracilis Sp
Page 96 and 97:
Heterosiphonia plumosa Plant filame
Page 98 and 99:
Lomentaria clavellosa This plant is
Page 100 and 101:
Hypoglossum hypoglossoides This spe
Page 102 and 103:
Melobesia membrancea This is a smal
Page 104 and 105:
Osmundea hybrida and Osmundea pinna
Page 106 and 107:
Phyllophora sp. Plant tough, cartil
Page 108 and 109:
Polysiphonia fucoides Plants are ge
Page 110 and 111:
Porphyra species These plants are f
Page 112:
Rhodothamniella floridula This plan
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s A Field Guide to the British Seaweeds - NMBAQC

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