Quiz8key - 7. (2 pts) What is the effect of turbidity in...

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MNS320 Marine Ecology 2010 Name:____________________________________ Quiz 8, 15 points total Answer all questions 1. (2 pt) The dominant feature of an estuarine environment is (a) Fluctuating salinity (b) fluctuating tide level (c) high temperature (d) fluctuating diversity 2. (1 pt) Name an important regulatory mechanism that organisms rely on. Osmosis 3. (1 pt) Sandy beaches have high productivity (T/F). False 4. (2 pts) Why would Talitrid amphipods have magnetotactic (magnetic) and phototactic (visual) modes of perception? For different environments – subtidal and intertidal habitats. 5. (1 pts) Results of many studies of the rocky intertidal zone suggest that the upper limits of organismal distributions are generally determined by _Desiccation_______________________, which seems to be a similar mechanism in estuarine habitats.
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Unformatted text preview: 7. (2 pts) What is the effect of turbidity in estuaries? Limits photosynthesis Limits filter feeding Often associated with higher nutrient loads in estuaries 8. (1 pt) Estuaries are not important nursery grounds, relative to pelagic waters (T /F). False 9. (1 pt) Stenohaline organisms occur throughout estuarine habitats because they can tolerate wide ranges of salinity (T / F). False 10. (2 pts) What is “bottom-up control” of productivity? (Two sentences max). Productivity is regulated by the basal trophic levels – photosynthetic activity limits biomass production, which in turn affects higher trophic levels. 11. (2 pts) Fiddler crabs have what 2 associations with bacteria? They act as a disturbance force They provide refuge for some bacteria species...
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This note was uploaded on 09/26/2010 for the course MNS 320 taught by Professor Staff during the Spring '08 term at University of Texas.

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