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20 Cards in this Set
- Front
- Back
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What is soil made of? |
1.Inorganic material (40%) 2.Organic matter (5%) 3.Air & H2O(50%) 4.Microorganisms and macroorganisms (5%) |
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Ubiquity |
Existing or being everywhere |
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Surface Soil |
highin organic matter and large #sof microbes |
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The carbon cycle |
Detritivores (soil microbes and others) |
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The Nitrogen Cycle |
- Denitrifying bacteria - Nitrifying bacteria - Nitrogen-fixing bacteria in soil - Nitrogen-fixing bacteria in root nodules of legumes |
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The Sulfur Cycle |
Microorganisms |
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Key player in soil web |
- Fungi - Bacteria - Protozoa |
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Prokaryotes |
Bacteria |
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Eukaryotes |
Filamentous Fungi Protozoans Nematode |
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Bacteria |
1.Chemoautotrophs 2.Decomposers 3.Mutualists 4.Disease suppressors 5.Pathogens |
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ChemoautotrophicBacteria |
oxidizeinorganiccompoundsto yield energy and reduce CO2 |
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Bacterial Decomposers |
species that breakdown organic biomass(e.g. dead plant material) |
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Actinobacteria |
classof bacteria that resemble fungi (branched networks of hyphae) and producenumerous enzymes that help break down organic plant material. Many members belonging to the Actinobacteriagroup of microorganisms also produce antibiotics |
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Bacterial Mutualists |
bacteriathat form "partnerships" with plants |
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Rhizobium |
speciesof bacteria that require a plant host (for nutrients and protection) and inreturn fix nitrogen (N2 gas to ammonium) that can be usedby the plant |
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Disease Suppressors |
bacterial species that can suppress theoccurrence of plant diseaseby secreting anti-fungaloranti-insecticidalcompounds |
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Bacterial Pathogens |
bacterialspecies that can cause diseasein plants and/or animals |
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Fungal Decomposers |
speciesthat breakdown organic biomass(e.g. dead plant material) |
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Fungal Mutualist |
bacteria that form "partnerships" with plantsevent |
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Fungal Pathogens |
fungal species that can cause disease in plants and/or animals |
