Ch 5.2 & 3 Environmental Science

The mass of living tissue in a trophic level

• tissue

• biomass

• mass

• weight

Removal of this species can significantly alter a community

• Occurs when there are no traces of the original community remaining, including vegetation and soil

• secondary succession

• primary succession

• trophic level

• pioneer species

• Nonnative organisms that spread widely in a community

• ccurs when a disturbance dramatically alters a community but does not completely destroy it

In general, only about
of the energy available at any trophic level is passed to the next; most of the rest is lost to the environment as heat.

What level do primary producers always occupy in any community.

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recycle nutrients within the ecosystem by breaking down nonliving organic matter

____ eat dead and decaying organic matter

Name an example of an invasive species