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CHAPTER PAGE 1 Introduction
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acid adapted adult amphipods anemone animals and plants Arenicola Ascophyllum Balanus balanoides barnacles Biol bottom brackish brown burrow Carcinus maenas chromatophores coast colour common crabs crustaceans Cystoseira deposit feeder eggs estuaries example factors fauna feed fish forms fresh water fronds fucoids Fucus Fucus spiralis gametophyte gastropods habitat high tide high water hydroid interstitial laminarians larvae less limpets Littorina littorea littorinids living low tide low water low-water lugworm marine marked method mid-tide MLWN molluscs muddy sand muddy shores mussels neap tides Nephthys numbers organic matter oxygen particles Patella Patella vulgata planktonic plants and animals Plate polychaete razor-shell red algae rhythms rock rocky shore salinity salt sample sand or mud sandy and muddy sandy beaches sandy shores sea water sea-shore seaweeds shell sheltered silt species stage stones sublittoral sublittoral zone surface temperature tidal tropical tube usually vesiculosus wave action wave-beaten worms zonation