Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

10 Cards in this Set

  • Front
  • Back
Primary Productivity
The rate at which organic material is produced by photosynthetic organisms in an ecosystem.
Organisms that capture energy includes:: plants, some bacteria and algae.
Organisms that consume plants or other organisms to obtain energy necessary to build their molecules.
Trophic Level
Ecologists assign organisms a specific level based on the organism's source of energy.
Food chain
The path of energy through an ecosystem.
Organisms that obtain their energy from organic waste and dead bodies; worms, fungi and bacteria.
Organisms that release energy back into the environment to be recycled by other organisms.
Food web
A complicated interconnecting group of food chains.
Energy Pyramid
Ecologists often illustrate the flow of energy from one trophic level to another in this method.
This is the dry weight of tissue and organic matter found in a specific ecosystem. Average loss is 90% per level.