Ecological Organization Ch. 37

Front

What percentage of energy is passed on to each trophic level?

Back

10%

Front

What is a non-native species to an area that is added accidentally or deliberately by humans?

Back

Invasive Species

Front

All food webs and food chains begin with what?

Back

Producers

Front

What is the term for a species that supports biodiversity in its ecosystem, such as the purple sea star (Pisaster ochraceus)?

Back

Keystone Species

Front

What is the process by which a new community forms where no community lived before?

Back

Primary Succession

Front

What is the term for organisms that produce their own food through photosynthesis or chemosynthesis?

Back

Producers

Front

What is the role of primary consumers in an ecosystem?

Back

They are organisms that eat producers.

Front

What is a food chain?

Back

A linear sequence of organisms through which nutrients and energy pass as one organism eats another.

Front

What is the difference between a food chain and a food web?

Back

A food chain is a linear sequence, while a food web is a complex network of interconnected food chains.

Front

What is an example of a keystone species?

Back

The sea otter, which helps maintain the balance of kelp forest ecosystems.