Soil Organisms

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Across
  1. 3. ____________ redundancy In health soil ecosystems there are several organisms that carry out similar tasks
  2. 4. Fungus-root association that benefits both plant and fungus
  3. 7. contains chlorophyll
  4. 10. The limiting resource determining microbial growth
  5. 13. ____________ producers form the base of the food web by photosynthesizing
  6. 14. (.1-2 mm) Mites, springtails, worms
  7. 17. predominant bacteria in the soil (40%)
  8. 19. Contribute 30-50% of the organic matter microbes feed on
  9. 20. Millimeter of soil closes to the root surface
  10. 21. Sporulating ________ - Clostridium, C. tetani, C. botulinum, Axotobacter – fixes N
Down
  1. 1. vascular plants, bryophytes (mosses)
  2. 2. Soil organism responsible for breaking down lignin
  3. 5. gophers, mice, ants, beetles, termites, grubs
  4. 6. (.1mm) nematodes, rotifers, amoebae
  5. 8. attack wide variety of organic substrates (pesticides)
  6. 9. Consumers that eat plants
  7. 11. (5-20%) Many produce antibiotics. Responsible for the smell of soil
  8. 12. (<.1mm) Root hairs, Algae, fungi, bacteria, cyanobacteria
  9. 15. Impact soil by burrowing and mixing
  10. 16. Most numerous soil organism
  11. 18. Type of microorganism that decomposes dead tissue