BIOL 150 Chapters 4.docx

BIOL 150 Chapters 4.docx - Types of Terrestrial Ecosystems...

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Types of Terrestrial Ecosystems: Biomes – Ex. Broad-leaved ever green forests, deserts, and grass lands - Major groupings of plat and animal communities defined by a dominant vegetation type - Each biome is associated with a distinctive set of abotic conditions - The type of biome present in a terrestrial region depends on climate o Climate – prevailing, long-term weather conditions in an area o Weather – specific short term atmospheric conditions of temp, sunlight, precip, and rain 4 Components of Climate Temperature – important because enzymes that make life work only work at an optimal range of temperature Moisture – important because it is required for life and terrestrial organisms constantly lose water to environment due to evaporation and transpiration Sunlight – important because it is required for photo synthesis Wind – important because it exacerbates effect of temperature and moisture. Wind increases heat loss due to evaporation and convection and increases water loss due to evaporation and transpiration - Also has direct impact on organisms (birds) Nature of the biome that develops in a particular region is governed by: - Average annual temperature and precipitation - Annual variation in temperature and precipitation NPP (Net Primary Production) – total amount of carbon that is fixed per year minus the amount that is oxidized during cellular respiration -
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