BIO120H1 Lecture 9: Lecture 9.docx
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BIO120H1 Full Course Notes
Verified Note
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Document Summary
Succession: plants communities" ability to change over time. To someone, he saw this as the development of the super organism. Pioneer species: plants that have seed banks built up. in first, but then replaced by k selected species. Shading, soil building (decay of plant into ground). studied in old field habitat (abandoned farms) in north east. Goes through temporary, non equilibrium seres orseral stages. End at climax stage where trees die and make way for seedlings below it. Lava breaks down plants to contribute organic matter. Secondary succession: already was plant community, soil has been built up but something has disturbed environment. Discreet event which cause large change in community. Fire, wind, farming primary successional sequence: animals come to area with plants. 20 years later grass covers and trees begin. Much later on canopy develops with real forest. Soil development a big deal secondary succession intemperate deciduous forest: trees which grew after crop fields abandoned.
