Variations in ocean tides.

Twice each day, the sea level rises at high tide and floods the area with salty water. Waves crash forcefully onto the shore. As the tide falls, living things are exposed to the hot sun, drying winds, fresh water rain, or icy frosts. Added to all of this are also the changes of night and day and the yearly cycle of the seasons. Animals that live in these habitats need and have specialized adaptations, and …

…photosynthesis to base a food chain on how do they get their food? This deep part of the ocean is the abyssal zone, where the water is low on nutritional content. Many chemical eating bacteria live where the tectonic plates meet and feed off of the large amounts of hydrogen sulfide that comes out of the earth. So basically they are making organic matters out of inorganic matters using chemical energy rather than light energy.