s A Field Guide to the British Seaweeds - NMBAQC

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Spongonema tomentosum Fine and filamentous and tangled into distinct woolly cords due to curled hooklike branches and generally limp, floppy and hair like. Highly and irregularly branched and consisting of uniseriate filaments but requires microscopic identification to distinguish from Ectocarpus and Pilayella. Commonly found attached to Fucus sp. throughout the littoral, may also be found in turfs and within rockpools. Characteristic hooked ultimate branches can be used to distinguish from other brown filamentous species Filaments form tangled woolly cords and attach to Fucus sp. Filaments uniseriate and numerously and irregularly branched
Aglaothamnion/ Callithamnion The form of these two genera are generally very fine and delicate consisting of numerously branched uniseriate filaments (single row of cells). Plants are often quite bushy and spongy due to the covering of numerous branchlets or ramuli extending from the main axis. Branching patterns can vary from regularly alternate to subdichotomous and dichotomous with both rounded and pointed apices. Cells are longer than broad and are often bone shaped. They tend to be quite small and are often found living amongst turfs in overhangs and attached to mussels, or epiphytically on a variety of algae. Aglaothamnion spp. tend to have a single visible nucleus where as Callithamnion spp. are known to have several nuclei. Cells of Callithamnion sp. clearly showing the numerous nuclei present as light pink spots. Aglaothamnion species only have one nucleus per cells. The variety of forms of Aglaothamnion and Callithamnion and in its natural turf forming habitat and showing its various branching patterns
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A Field Guide to the British Seawee
Page 3 and 4:
INTRODUCTION The EU Water Framework
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- Turfs of mixed species including
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Some species have distinct vertical
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Table 1: Field sampling sheet to re
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Table 2: Species lists for each of
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The varieties of algae forms are br
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Special features that need to be co
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• Reproductive structures - these
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Axial cell • Distal- Towards the
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A FIELD KEY TO THE BRITISH SEAWEEDS
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Rhodophyta The red algae exhibit a
Page 25 and 26:
Group A 1. Plants completely flatte
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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 and 42: Browns Alaria esculenta Ascophyllum
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 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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