BIOINDICATORS

4. are considered accurateindicators of environmental stress andthe health of biosphere as a whole
5. SYSTEM the presence or absence of certain plant or other vegetative life in an ecosystem can provide important clues about the health of the environment
9. The ability of an ecosystem to recover from disturbances or stress.
11. have been widely documented as useful indicators of environmental waterquality because of their differentialsensitivity to pollution.
13. occurs through a chemical reaction that produces light energy within an organism's body
14. are algae that live in houses made of glass
16. of Eichornia indicatessewage and heavy metal pollution of water
18. spp. Indicate the presence of gold in the soil
19. insects such as stone flies,mayflies and water pennies require ahigh amount of dissolved oxygen (DO)and they provide important cluesabout the water they are living in.
20. is the gradual accumulation of substances, such as pesticides, or other chemicalsin an organism.

1. If you only find animals like leeches, snails,andaquatic worms, there is a problem with water quality.
2. water shrimp You can determine if the water ispolluted by collecting a sample of suspected water and analyze the type of animals that are in the sample.
3. A community of living organisms and their interactions with the environment.
6. can live in extreme conditions, but they hate pollution
7. The researchers are seeking data on fireflies worldwide, to see whether their populations are increasing or decreasing.
8. have the ability to indicate indirect biotic effects of pollutants when many physical or chemical measurements cannot
10. This type of microorganism can produce stress proteins when exposed to toxins like cadmium or benzene
12. The degree to which an organism responds to environmental changes.
15. SYSTEM An increase or decrease in an animal population mayindicate damage to ecosystem caused by pollution
17. also known as bioamplification or biological magnification, is the increasing concentration of a substance,such as a toxic chemical, in the tissues of tolerant organisms at successively higher levels in a food chain