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Ecosystems and energy transfers Typeit
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Many organisms, called consumers, feed on others to get their energy. These relationships between what eats what can be shown linearly in a , and the energy level at which an organism feeds is called a . These levels begin with a large number of , which do not eat other organisms but instead obtain their food by photosynthesis using energy from the Sun. When the masses of the living organisms at each level are stacked on top of each other, this is called a . It is called this because energy transfer is inefficient between levels and so is lost with each level. This means that each level can support organisms than the level before it.
The abundance and distribution of organisms in an ecosystem can be sampled along a gradient using quadrats placed along a belt at regular intervals.