The Characteristics of a Sandy Shore at Pallarenda Beach, Townsville,

1584 WordsMay 6, 20007 Pages
The characteristics of a sandy shore at Pallarenda beach, Townsville, North Queensland. Introduction: The sandy shores of beaches can be considered as a very harsh environment to live in (Ted Klenk, 1999). Survival in such a habitat requires an organism to withstand strong wave and current action, tidal rise and fall, unstable substrate, heavy predation and wide variations in salinity and temperature (The Otter Island Project). Any organism found in this type of harsh environment is specialized and highly adapted (The Otter Island Project). Fine, sandy beaches often occur in areas with light wave action (California's Ocean Resources, 1995). While a more coarse sand is found with heavy wave action (California's Ocean Resources,…show more content…
Station Animals and features 1 Vegetation line 2 End of vegetation line 3 Shell line, Ghost crab 4 Shells 5 Wet sand on beach surface, Ghost crab 6 7 8 Fresh water runoff, crab burrows, Ghost crab, Hermit crab. 9 10 11 12 Bivalves, hermit crabs, sand dollars, polychaete worms and gastropods. Table 2: Presence and occurrence of marine organisms in the surf zone of Pallarenda beach. Organism F, frequent species. +, Species present. Sting Ray + Herring + Anchovy + Long Tom + Gar fish + Whiting F Pony fish F Trevally + Mullet + Thread fin fish + Flat fish + Puffer fish + Prawns F Mackerel + Crab F Jew fish + Snub nose dart + Shovel nose shark + Discussion: The profile of Pallarenda beach as shown in figure 1 is very typical of a North Queensland, medium energy beach. The lack of organisms present higher up the beach was due to the harsh conditions at low tide. Ghost Crabs, Ocypode quadrata, can survive these areas as a result of their adaptations (The Otter Island Project). The ghost crab burrows during the day and feeds at night to avoid the heat of the day (The Otter Island Project). These crabs can actively take up moisture from damp sand to wet their gills (The Otter Island Project). The anoxic layer is very deep above the areas with coarse sand. This is in accordance with what was mentioned in the introduction. The coarse grained sand has more water passing though it to increase the
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