BIO 112 Lecture Notes - Lecture 6: Biome, Climax Community, Primary Succession

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12 Dec 2016
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Succession: succession: communities proceed through a series of predictable changes in structure over time, climate community: long-lasting community in result of succession, caused by weather, soil, water, seed, disturbance, invasion of organisms. Primary succession: lack of organism & bare mineral surfaces or water takes long time ex: volcanic activity, glaciers, lowering sea level. Secondary: destruction or disturbance of already existing ecosystem ex: fire, flood, winds, human activity. Primary succession: factors determining rate and kind of community that develops. Climate determines species, determine how quickly organic matter accumulates. Plants determine species: pioneer stages: littler moisture, drastic temperature changes, few nutrients, few places to attach-windblown spores or other small organisms become established=pioneer community (first to colonize) Biomes: terrestrial climax communities with wide geographic distribution, primary factor of determination is climate. Precipitation: total amount, form rain (rain snow, sleet), seasonal distribution. Temperatures: stable thru year or varies (warmest near equator, closest to ocean is warmer)