s A Field Guide to the British Seaweeds - NMBAQC

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Laminaria saccharina Cartilaginous, large frond, unbranched with wavy edge, and crinkly centre Found in littoral/subtidal fringe Grows in a variety of habitats but mainly in the mid to lower littoral on rock Fine, filamentous, unbranched and growing Grows mainly on Alaria and Chorda, so in small tufts Cartilaginous, with frond in-rolled forming located in mid to lower littoral distinct channel Grows only in upper shore regions Thin, membranous, foliose, undivided Found throughout the littoral on various frond and ribbon-like substrates Fine and filamentous, branched, may form Found throughout the littoral particularly mass of filaments Crust, black growing on rock surface or on sandy substrate limpets Large and cartilaginous, with warty bulb Found throughout the littoral holdfast and wavy ribbon stipe Grows in the littoral/sublittoral fringe Tubular, hollow, unbranched with regular Found throughout the littoral but common constrictions in wide shallow and sandy rockpools Found growing in turfs in overhangs Filamentous, branched and coarse growing throughout the littoral or attached to as stunted tufts Corallina in pools Filamentous, branched and tangled into Often grows on Fucus so found throughout woolly cords the littoral Leathesia difformis Spherical, gelatinous, bulbous hollow sack Litosiphon laminariae Pelvetia canaliculata Petalonia fascia Pilayella littoralis Ralfsia sp. Saccorhiza polyschides Scytosiphon lomentaria Sphacelaria sp Spongonema tomentosum Reds Aglaothamnion/ Callithamnion Ahnfeltia plicata Audouinella purpurea Audouinella sp Calcareous encrusters Callophyllis laciniata Catenella caespitosa Fine, delicate, densely branched small and Growing in turfs or mats in overhangs and spongy appearing tufted crevices in the mid to lower shore Black, coarse and wiry, branching irregular Growing in sandy bottom rockpools in mid with disc holdfast to lower littoral Fine, filamentous, few branches and turf Growing in turfs or mats in overhangs and forming, mossy crevices throughout the littoral Small filaments, microscopic, few cells Grow epiphytically on a number of species long, epiphytic so found throughout the littoral Calcareous, in various shades of pink and Found growing on hard substrate purple covering rock surfaces; white when throughout the littoral zone and commonly bleached in rockpools Floppy and fleshy, divided broad fan Grows in the lower littoral/sublittoral shaped sections Small, creeping, variable with irregular fringe branching and constrictions Growing on upper shore in crevices Reduced species list identification guide as required by the Water Framework Directive. 42
Ceramium nodulosum Ceramium shuttleworthanium Ceramium sp. Chondrus crispus Corallina officinalis Cryptopleura ramosa Cystoclonium purpureum Delesseria sanguinea Dilsea carnosa Dumontia contorta Erythrotrichia carnea Furcellaria lumbricalis Gastroclonium ovatum Gelidium sp. Gracilaria gracilis Halurus equisetifolius Halurus flosculosus Filamentous, variously branched, dark pink; may appear banded Filamentous, numerously branched, red/dark pink with spines; may appear banded Filamentous, numerously branched, dark pink may appear banded Tough, flat, with wide wedge shape frond, dichotomous branching & stipe; highly variable form and easy to confuse with Mastocarpus Calcareous and jointed with bone like structure, light pink in colour Blade wide, foliose, thin and leafy with veins, and frilly blade edges Firm, cartilaginous, straggly, variously branched, long with claw holdfast Foliose, delicate, resembles thin beech leaf with distinct midrib & veins, ruffled edge Tough and leathery with wedge shaped divisions, branching from base Soft, hollow sometimes gelatinous and slimy, limited branching Fine unbranched filaments, epiphytic and microscopic Tough, cartilaginous, cylindrical frond, dichotomous branching, claw holdfast Fleshy, cylindrical branches with small bundles at tips with base constricted Tough, slightly cartilaginous, irregular branching, broad flattened tips but cylindrical lower section Long, straggly, cartilaginous and firm, irregular branching and pointed tips Filamentous with whorled branching resembling bottle brush Filamentous, fine, hair-like, highly branched, bright pink Found growing throughout the littoral region within a variety of habitats Found growing throughout the littoral region within a variety of habitats, often found on mussels Found growing throughout the littoral region within a variety of habitats Grows throughout the littoral on a variety of surfaces Found growing throughout littoral region within a variety of habitats, particularly rockpools Grows in the lower littoral/sublittoral fringe Found on the mid to lower shore usually within wide shallow rockpools Grows in the lower littoral/sublittoral fringe Grows in the lower littoral/sublittoral fringe More common found in the mid to upper littoral in shallow rockpools Grows epiphytically on variety of Polysiphonia and Ceramium sp. throughout littoral Found in sandy bottom rockpools usually in mid to lower littoral regions More common found in the mid to upper littoral in shallow rockpools Found on mid to lower shore on rock surfaces, crevices and overhangs often forming turfs or mats Found in the mid and lower littoral within pools and on open rock surfaces Grows in the mid to lower littoral particularly in rockpools and damp overhangs Grows in the mid to lower littoral particularly in rockpools and damp overhangs Reduced species list identification guide as required by the Water Framework Directive. 43
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 and 40: 3. Plant generally found attached t
Page 41: Browns Alaria esculenta Ascophyllum
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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