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

1580 Words May 18th, 2000 7 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,
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The sediment was put in a vial with water and shaken. The time taken for the sediment to settle was recorded and applied to a resuspension category.
Other physical features: Penetration depth was determined by pushing a wooden rod through the sediment using a reasonable and continuous force at each station.
Biological Survey: Each group carried out a trawl along the surf zone parallel to the beach for 3 to 5 minutes. The different organisms captured from each trawl were recorded.

Results:
Figure 1 shows the profile of Pallarenda beach including the water table and anoxic layer. The lowest point on the profile was a stream of water, which was running perpendicular to the profile. The water line was at the last station on the profile. A projection of the anoxic layer has been included as it was often to deep to be found easily by digging.
Figure 2 shows the percentage of fine sediment at each station along the beach profile. There was a large amount of fine sediment both at the start and finish of the transect. Figure 2 also shows the resuspension categories of the fine sediment. Level one being the lowest and level five being the highest.
Table 1 shows the different organisms found at each station along the transect. It also shows basic characteristics of the beach along the profile. The numbers of organisms found higher up the beach were very minimal.
Table 2 shows the different organisms caught in the three trawls carried out through the surf zone. There was no

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