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Terms in this set (15)
A series of changes in a community
Occurs in a community where no soil existed. Only bare or volcanic rocks
Must be very hardy ex: algae and fungus, lichens (algae makes food and fungus provides the home)
Stages of primary succession #1
Begins with lichens or some pioneer species on rocks. Acids from lichen erode and breakdown rocks into soil.
Bacteria and decomposers #2 primary
Break down dead lichens. Spill begins to form.
Nutrients #3 primary
Soil begins to form and deposition add nutrients to the soil.
Other plants can now grow in the area (Mosses) and help anchor the soil. Anchored soil allow larger plants like grades and ferns to grow.
As more complex plants grow and die, soil becomes rich and futile and allows more complex plants to move into the area.
Similar changes in animal life occurs. Small plants would support small herbivores, etc
The larger the varietyof plants, the larger the herbivores and other organisms that can live in the area
Progression of #1 succession in Deciduous foray
Rock surface-lichens-decomposers-Mosses-ferns, shrubs - pines - hardwoods
on type of bone ex: tundra will not have trees
The final stage of succession; a stable community with much biodiversity
Occurs following a disaster or some disturbance ex: volcano, tsunami **some soul remains after disaster which them starts secondary succession
Occurs more rapidly because spill exists a well as seeds and roots
Moves from less complex organisms worth quick growth and short life span to more complex organisms with slower growth and longer life spans ex: lichens to eventually hardwoods in Deciduous biome
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