BIOA02H3 Lecture 12: Lec12 - Plant Life on the Edge.doc

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BIOA02H3 Full Course Notes
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Slide one plant life on the edge. Slide two adaptations huge rage of habitats. Slide three conditions of life on the edge. Frost: heat / drought, perpetual inundation, overabundance of freshwater, salty habitats, toxic soils (heavy metals, extreme nutrient limitation. Slide four habitats common in southern ontario: aquatic plants, plants are submerged in the water, some are on the water"s surface. Slide five the freshwater environment: water is never limiting, however, the overabundance of water means that other things in turn become limiting. Example: co2 / o2 is much more abundant in the air than it is in the water. Light attenuates very quickly or decreases in the photosynthetically active spectrum as you go deeper under a water column. If you compare the nutrient content in water and soil, soil contains much more: plants have to adapt to running water currents to prevent damage of the wear and tear of leaf and stem.

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