Energy comes in many forms. The most common and simplest energy flow model is based on the capture of sunlight energy by primary producers (e.g., algae or grass). The energy passes up a food chain to consumers (algae-eating insect larvae or cows at trophic level 1), then further up the food chain to predatory consumers (fish or humans). In this simplistic model, the transfer of energy up the food chain results in smaller amounts of biomass being present at each successively higher trophic level. This means the that the bio-community will have as components lots of primary producers, fewer consumers, and even fewer predators at the higher trophic levels. But here is another example of energy "flowing through" a living system. Consider the community that lives in the rocky intertidal zone - there are barnacles, mussels, snails, and perhaps starfish. While some primary production goes on in this system, there''s another BIG energy flow at work - the rising and falling of the tides and the constant energy input from the waves. This is not sunlight energy, but kinetic energy that moves water around. The organisms of the biological community take advantage of this. Much of the biological community consists of detritivores and filter feeders. They are attached to rocks and they depend on the kinetic energy in the system to constantly bring them water with a fresh supply of detritus and algae. From the standpoint of energetics, the rocky intertidal zone bio-communiy''s structure is dependent on organic matter imported from other nearby biological communities.

Sargasso Sea

Ocean Primary Productivity of Each Ocean Area- http://www.eorc.jaxa.jp/en/imgdata/topics/2004/tp040405.html

Classification of the Marine EnvironmentClassification of the Marine Environm

But G. sphaerica''s traces are the spitting image of the old, Precambrian fossils; two small ridges line the outside of the trail, and one thin bump runs down the middle. At up to three centimeters (1.2 inches) in diameter, they''re also enormous compared to most of their microscopic cousins