BIOL 4280 Study Guide - Final Guide: Herbivore, Northern Pike, Photic Zone
27 Dec 2017
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Compare typical light requirements of phytoplankton versus macrophytes. Macrophytes are both associated with but also contribute to clear water states. Deliberate macrophyte planting might be used as one strategy to help combat eutrophication. What lake characteristics are required to make such activity feasible. In a shallow lake, it would allow macrophyte planting to more successful in combating eutrophication. Scheffer describes an alternative steady state between clear water/macrophyte dominated systems and turbid water/phytoplankton dominated systems (for shallow lakes). Draw a conceptual model describing a theoretical transition from macrophyte green algae cyanobacteria dominance against total p. where are the key hysteresis points: the key hysteresis points are ec and ev. Increasing the amount of grazers will cause a decline in chlorophyll a and increase in water transparency, as well as a shift in algal species. Draw a diagram contrasting the basic trophic cascade model comparing a four food chain versus 3 food chain system.
