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Explain why seasonal stratification of temperature and oxygen takes place in deep ponds and lakes.
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- Describe the process of Eutrophication. Make sure to include ALL of the steps involved and what the outcome is for organisms living in the water.Describe how density of the water column changes with depth in BOTH a stable and an unstable water column.Explain what would happen if: There is excessive growth of algae in a waterbody.
- List the two sources of dissolved oxygen in a lakeTo protect oligotrophic lakes from eutrophication, it is important toImagine you are testing water samples from a local pond for pollutants. Your lab instructor sees the results of your dissolved oxygen test and remarks that your water sample has the same dissolved oxygen level as water found near the seafloor of a dead zone. What is the dissolved oxygen level of this water sample? 650-700 ppm 350-360 ppm 80-90 ppm 7-9 ppm 2-3 ppm
- Explain how streams can cleanse themselves andhow these cleansing processes can be overwhelmed.What is wastewater? Describe the state of streampollution in more- and less-developed countries.Give two reasons why lakes cannot cleanse themselves as readily as streams can. Distinguish betweeneutrophication and cultural eutrophication. Listways to prevent or reduce cultural eutrophication.Explain why groundwater cannot cleanse itself verywell. What are the major sources of groundwatercontamination in the United States? List ways to prevent or clean up groundwater contamination. Listsome ways to purify drinking water. Describe the environmental problems caused by the widespread useof bottled water.Define eutrophication.Why is release of sulfide from oxygen minimumzones infrequent, occurring at times of exceptionallyhigh surface water productivity?