s A Field Guide to the British Seaweeds - NMBAQC

More documents

Recommendations

Info

Cystoclonium purpureum This is a filiform plant often with a distinct main axis which may be up to 2 mm wide. It is highly and irregularly branched, growing up to 60 cm long and can appear quite straggly. This species is often distinguished from similar species such as Rhodomela sp. by its distinct claw-like branched holdfast. Cystocarps can appear as swellings within the smaller branches. It is found in the mid to lower littoral and sublittoral fringe, generally located within rockpools and may be browny red or purple in colour. Delesseria sanguinea Plant with distinct and uninterrupted midrib and side veins. Very thin, foliose, membranous and delicate, plant with limited branching generally occurring at the base and arising from a main thick stipe. Fronds long and broad growing up to 40 com long with edges appearing ruffled often resembling elongated beech leaves. Pinky red in colour it is found in the lower littoral and sublittoral fringe and within deep lower littoral rockpools, may be found attached to kelp stipes. Not to be confused with Phycodrys rubens. Delesseria with distinct leaf like appearance due to thick midrib and veins General appearance of Cystoclonium with claw-like holdfast, cellular structure and presence of cystocarps Branching of Delesseria from main stipe near base only
Dilsea carnosa Plants thick (up to 1 mm), tough and leathery but slightly elastic and may reach up to 30 cm in length and 20 cm in width. Deep red in colour consisting usually of wedge shaped fronds that may be split or worn in older plants. This species is unbranched but several fronds may arise from the base through tapering of the frond which may resemble a short stipe. Found mainly in the lower littoral and sublittoral fringe attached to solid substrate via a disc like holdfast Dumontia contorta Plants tubular and completely hollow throughout sometimes appearing a little gelatinous and membranous. Branching is irregular and may be quite minimal with branches mainly extending from main axis. The point of branching may be slightly constricted but generally width of filaments ranges from 1 to 10 mm broad and can grow up to 50 cm long. The tips of the plant often turn green when rotting but the plant tends to be dark red or brown in colour. Found throughout the littoral often in shallow rockpools on both rocky and sandy substrates. Common throughout the UK and Ireland. Not to be confused with Nemalion helminthoides which is also gelatinous but completely solid. Dilsea in natural habitat and showing split lobe and basal attachment Various microscopic views of Dumontia showing the different cellular structures Dumontia in natural habitat and showing branching pattern
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 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 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 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
show all

s A Field Guide to the British Seaweeds - NMBAQC

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?