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ECOLOGY OF THE SEASHORE
lecture resources Bringing ecology to life ECOLOGY OF THE SEASHORE A complete seashore sampling and quantification course on CD-ROM. PowerPoint presentations showing the species you are likely to find and the techniques you need. LECTURE 6 ECOLOGY OF THE STRANDLINE Photography, text & design by Dr James Merryweather
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THE STRANDLINE At every high tide, the sea casts large
2 At every high tide, the sea casts large quantities of ‘flotsam’ onto the shore THE STRANDLINE
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THE STRANDLINE Besides domestic refuse, ‘jetsam’ from ships,
3 Besides domestic refuse, ‘jetsam’ from ships, leaves, twigs and logs, most is dead seaweed THE STRANDLINE
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THE STRANDLINE High tides vary between high springs and low
4 High tides vary between high springs and low neaps, so a series of strandlines can be deposited THE STRANDLINE
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Different tides bring in different strandline material
5 Leaves Seaweed Different tides bring in different strandline material THE STRANDLINE
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In autumn, cast up leaves can be very diverse and well mixed
6 In autumn, cast up leaves can be very diverse and well mixed THE STRANDLINE Oak, Birch, Willow, Ash, Rowan, Alder, Hawthorn
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When first cast up, seaweeds are plainly recognisable . . .
7 When first cast up, seaweeds are plainly recognisable . . . THE STRANDLINE
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Kelp fragments with egg, bladder & serrated wracks
8 Kelp fragments with egg, bladder & serrated wracks THE STRANDLINE
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Seaweed rots rapidly as micro- organisms use it as a food source
9 Seaweed rots rapidly as micro- organisms use it as a food source THE STRANDLINE
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THE STRANDLINE Orchestia gamarellus
10 Orchestia gamarellus It becomes a thick, smelly soup, the ideal home for sandhoppers and the larvae of seaweed flies THE STRANDLINE
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THE STRANDLINE Above the high tide line, shingle fertilised
11 Above the high tide line, shingle fertilised by dead seaweed is home to a range of plants THE STRANDLINE
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Many strandline plants are seashore specialists
12 Many strandline plants are seashore specialists THE STRANDLINE
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Tripleurospermum maritimum
13 Sea mayweed Tripleurospermum maritimum THE STRANDLINE
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14 Sea campion Silene uniflora THE STRANDLINE
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15 Sea aster Aster tripolium THE STRANDLINE
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Cochlearia officinalis
16 Scurvey grass Cochlearia officinalis THE STRANDLINE
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Atriplex glabriuscula
17 Babbington’s orache Atriplex glabriuscula THE STRANDLINE
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THE STRANDLINE Rumex crispus Others are (or have become) weeds
18 Rumex crispus Others are (or have become) weeds of agricultural land and waste places THE STRANDLINE
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THE STRANDLINE Curled dock Rumex crispus Goosegrass Galium aparine
19 Galium aparine Rumex crispus Curled dock Rumex crispus Goosegrass Galium aparine THE STRANDLINE
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20 Silverweed Potentilla anserina THE STRANDLINE
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21 Chickweed Stellaria media THE STRANDLINE
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22 BEACH COMBING - A strandline searcher may discover many treasures: biological, intriguing, even profitable.
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