Complex sentence: The Lake is connected to the Atlantic Ocean near Lawrencetown Beach, because of this, the lake varies in salinity from almost completely fresh water at the north end to nearly that of ocean water at the south end.
Split into simpler sentences: The Lake is connected to the Atlantic Ocean near Lawrencetown Beach. Because of this, the lake varies in salinity from almost completely fresh water at the north end to nearly that of ocean water at the south end.