ENWC314 Lecture Notes - Lecture 2: Delmarva Peninsula, Water Potential, Xylem
12 Sep 2016
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Document Summary
What limits geographic distributions: types of dispersal. Diffusion-- gradual spread of the population across hospital terrain. Jump dispersal-- movement of individual organisms across large distances, unsuitable terrain, to new area where establish new pop. Ex: gypsy moth example in the book caused loss of trees. Ex: ballast water in ships many regulations for these: both invasive species moved by humans-can be intentional but not always, physical and chem. Factors: biotic factors on a local scale. Factors ecotypic genetic variability in one species: limits biotic factors, predators, diseases, parasites, competitors. Marine regions: based on depth and location, pelagic open ocean. Broken into meso-, bathy-, abysso-, by depth: benthic- on or in seabed. Depth and pressure: water is heavy, every 10 m in depth adds 14. 69 lbs/in2, even shallow water organisms have adapted to high pressure, small body size, no swim bladder, more gelatinous body form. Terrestrial regions: what can be interpreted from this picture? (slide 9)
