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THE SOIL FOOD WEB

THE SOIL FOOD WEB. Soil Biology and the Landscape. The Soil Food Web. Living organisms <5%. Fresh residue <10%. Stabilized organic matter (humus) 33% - 50%. Decomposing organic matter (active fraction) 33% - 50%. Components of Soil Organic Matter. Rhizosphere.

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THE SOIL FOOD WEB

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  1. THE SOIL FOOD WEB

  2. Soil Biology and the Landscape

  3. The Soil Food Web

  4. Living organisms <5% Fresh residue <10% Stabilized organic matter (humus) 33% - 50% Decomposing organic matter (active fraction) 33% - 50% Components of Soil Organic Matter

  5. Rhizosphere

  6. Microbial Biomass with Depth

  7. Seasonal Microbial Activity

  8. FOOD WEB & SOIL HEALTH

  9. Biomass of Soil Organisms in Four Ecosystems

  10. Typical Numbers of Soil Organisms in Healthy Ecosystems

  11. Methods for Measuring the Food Web

  12. Bacteria with fluorescent stain for counting

  13. A Complex Food Web

  14. Complexity of the Soil Food Web in Several Ecosystems

  15. BACTERIA

  16. Bacteria

  17. Nitrogen-fixing Bacteria • Nodules formed where Rhizobium bacteria infected soybean roots.

  18. Actinomycetes Bacterial cells that grow like fungal hyphae

  19. Bacteria vs. fungi

  20. FUNGI

  21. Fungi and Soil Quality • Decompose carbon compounds • Improve OM accumulation • Retain nutrients in the soil • Bind soil particles • Food for the rest of the food web • Mycorrhizal fungi • Compete with plant pathogens

  22. Mycorrhizae Tree root Fungal hyphae Mycorrhizal structure

  23. Ectomycorrhizae

  24. Arbuscular Mycorrhizae (AM)

  25. Mushrooms:The fruiting body of some fungi

  26. Mycorrhizal Fungi

  27. PROTOZOA

  28. First 29 of 58 Slides On Soil Foodweb

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