Energy and Matter in Ecosystems

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Across
  1. 2. Cycles through an ecosystem
  2. 5. Refers to the role or position an organism occupies in its environment.
  3. 6. Release essential nutrients back into the soil or water, making them available for producers.
  4. 7. … primary productivity is the remaining energy after autotrophs have used some of the energy for respiration.
  5. 9. Bacteria that convert nitrates in the soil into gaseous nitrogen and oxygen .
  6. 10. Acquire energy by consuming other organisms
  7. 11. …. exclusion principle postulates that no two species can occupy the same niche in the same environment for an extended period of time.
  8. 13. Pyramid of …. is a graphical representation that shows the number of organisms at each trophic level.
  9. 16. The process by which organisms convert energy stored in glucose, into a usable form of energy.
  10. 18. are larger organisms that break down large chunks of dead and decaying matter into smaller pieces
  11. 19. Total dry mass of living organisms in a given area
  12. 20. A species that has a large effect on population numbers of other species.
Down
  1. 1. The process by which autotrophs convert light energy into chemical energy
  2. 3. Each position an organism has in a chain is referred to as a …….. level
  3. 4. Pyramid of …. is a graphical representation of the energy flow through each trophic level.
  4. 7. Bacteria that convert ammonia into nitrites
  5. 8. Cannot be recycled through an ecosystem
  6. 9. Break down dead plants, animals, and organic waste into simpler substances
  7. 12. The rate at which plants produce organic compounds
  8. 14. In aquatic ecosystems, the pyramid may be inverted because producers like phytoplankton have less biomass but a faster turnover rate
  9. 15. Self- feeder
  10. 17. … primary productivity is the total amount of chemical energy produced by autotrophs in a given area and time.