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9 Cards in this Set
- Front
- Back
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Succession
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the change in species composition in communities over time
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Primary Succession
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starts with no mineral substrate (NO SOIL)
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Secondary Succession
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starts with mineral substrate (SOIL) and a seed bank
"Reestablishment of a community after nearly all organisms are destroyed |
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Process of Primary Succession
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1. moss, lichen, and bacteria
2. vascular plants 3. herbivores and predators |
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Where does Primary Succession occur?
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Bare rock, volcanic eruptions, glacial retreats, land slides, man made structures, flooding....etc
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Where does Secondary Succession occur?
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Fire, Hurricane, Logging, herbivory, parts of volcanic eruptions
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Pioneer Species
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The first species to colonize an area
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Traits of pioneer species
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shade intolerant
small rapid growth rate early maturity high dispersal rates -symbiotic associations to fix soil with N |
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OLD FIELD SUCCESSION
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1. low annual grasses
2. perrenial grasses 3. woody shrubs 4. pioneer saplings 5. short lived pioneer saplings 6. hardwoods and shade tolerant undergrowth 7. gaps from dying trees lead to an eneven age canopy |
