What are 5 ways estuaries are important to the ecosystem? Estuaries cover less than 1%. ....of the Earth's surface area. What happens when you're in the zone?
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- The process whereby oxygen is depleted by the growth of microorganisms due to excess nutrients in aquatic systems is called _________. a. dead zoning b. eutrophication c. retrophication d. depletionA key feature of estuaries is a. low light conditions and high productivity b. salt water and fresh water c. frequent algal blooms d. little or no vegetationThe figure above shows main abiotic and biotic factors influencing the physiology and behavior of fish larvae in estuaries. The more important the factors are for the larvae, the thicker the lines. Suppose changes from question 1 take place. Draw a new figure and redefine the thickness of the lines and new factor interactions. This is from question 1 : A proposal is made to deepen the entrance and main channel of an estuary. What do you suppose will happen to the salt marshes that surround the channel? What do you predict will happen to the productivity of the estuary? Deeper channels would probably change the mixing of the fresh and saltwater and lead to increased salinity and changes in the salt wedges in the channel. This would probably negatively impact the plants on the edges of the channel, as they would have to deal with higher salt levels than they are adapted to. The strain that would be put on the plants (like cordgrasses) in the marshes, would most likely lead to a…
- 9- Which of the following is NOT true about turnover in freshwater lakes? a- Turnover brings up nutrient-rich water from the lake bottom. b- Turnover brings up oxygenated water from the lake bottom. c- Turnover sends oxygenated water from the lake's surface to the lake bottom. d- Turnover usually occurs in the spring and fall seasons. 10- The aquatic biome that represents the transition area between a river and a sea is called a(n) __________. 11- An example of a biotic interaction that could limit a plant's distribution is __________. a- rabbit herbivory b- extreme winters c- acidic soils d- a fire regime 12- Each female herring (a species of fish) produces millions of eggs each year. Which type of survivorship curve do herring probably have? a- Type II b- Type I c- Type IV d- Type III 14- Which of the following is NOT a mechanism of density-dependent population regulation? a- predation b-…you observe that coastal marshes are increasingly becoming flooded and that nearby coral reefs are dyingwhat is the most likely explanation?Pollution is caused mainly through anthropogenic activities. List the contribution you and your community play in making drinking water unwholesomeWhat are the causes of poor solid waste management in your communityHow is waste water managed in your community? Describe it.What environmental effects do you for see on the air quality and water bodies?
- Why are estuaries irreplaceable?The following is a list of abiotic factors that would have a micro-effect on a tidal pool (rocky pockets of water where the ocean meets the land). Select the one that would have larger, long-term effects if changed.(1 point) rising water depth temperature water chemistry (pH, pollution, etc.) weather (wind, rain, etc.)When air is heated, it and can hold water. O rises, less O sinks, less O rises, more sinks, more
- (D) cold winter months4. The oceans affect the biosphere in all of the following waysexcept(A) producing a substantial amount of the biosphere’s oxygen.(B) removing carbon dioxide from the atmosphere.(C) moderating the climate of terrestrial biomes.(D) regulating the pH of freshwater biomes and terrestrialgroundwater.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.Allof the following statements concerning oligotrophic lakes are true, except:a.warm temperatures.b.low nutrients.c.high oxygen content.d.deep and clear waters.e.low biological productivity.
