Essay on Rocky Intertidal Zonation At Lawrencetown Beach

1238 Words Oct 15th, 2016 5 Pages
Rocky intertidal zonation at Lawrencetown Beach

Introduction
Nova Scotia has an extensive coastline with varying degrees of exposure. The intertidal zone (littoral zone) is where the ocean meets land and around Nova Scotia‚Äôs coast this zone is highly diverse, from salt marshes to mudflats and rocky shores. The intertidal zone is the area that is exposed to air at low tide and submerged by water at high tide and the species that are located here need to tolerate various levels of exposure. The factors that affect the abundance of species present in an area vary with spatial scale. Abiotic factors include rockiness, temperature, tidal influences, salinity, while biotic factors impacting an area. Biotic factors such as predation and herbivory also influence where certain species are found in the intertidal zone (Blaxter and Southward, 1987). In the mid-littoral zone the diversity in species increases due to the fact that more species can tolerate the shorter exposure at low-tide (an abiotic factor) (Nova Scotia Museum of Natural History, unknown). The purpose of this study was to investigate species diversity in the various levels present within the intertidal zone (supralittoral, mid-littoral and infralittoral) at Lawrencetown Beach (Fig. 1). The community edges are better defined in this sort of intertidal zone than, for example, communities located in mudflats. Lawrencetown Beach is quite a sheltered area with a steep slope and small to moderate-sized rocks and emergent…

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