Excess nitrogen added into the nitrogen cycle by human-produced fertilizers causes: Select one: a. high concentrations of nitrogen only in fertilized areas. b. maintenance of soil pH. c. overpopulation of fish in lakes and rivers. d. poisoning of algae populations in lakes. e. eventual oxygen depletion in nearby water systems.
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Step 1: Excess nitrogen from human-produced fertilizers is added to the nitrogen cycle through runoff from agricultural fields or leaching into groundwater. Show more…
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Excess nitrogen can lead to algal blooms and the death of fish. Which characteristic of nitrogen causes this problem? A. Nitrogen is essential for growth in producers. B. Nitrogen is essential for the salinity of water. C. Nitrogen causes acid to form in water. D. Nitrogen buffers cells from extremes in pH.
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Nitrogen Cycle in a Terrestrial Ecosystem with Major Harmful Human Impacts Process Reservoir Denitrification by bacteria Nitrogen in atmosphere Nitrification by bacteria Pathway affected by humans Natural pathway Nitrogen in animals (consumers) Electrical storms Nitrogen oxides from burning fuel and using inorganic fertilizers Volcanic activity Nitrogen in plants (producers) Decomposition Nitrates from fertilizer runoff and decomposition Uptake by plants Nitrate in soil Nitrogen loss to deep ocean sediments Nitrogen in ocean sediments Bacteria Ammonia in soil
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Nitrogen and phosphorous, used as fertilizers in farming, are present in water run-off and are often deposited into lakes and rivers. Which of the following could be an eventual effect of the excess nutrients when they eventually enter the oceans from the rivers? The excess nutrients would increase the number of primary producers which would undergo more photosynthesis and produce high levels of oxygen. The area around where the rivers enter the ocean would have a much lower amount of primary production since the nutrients would be used up in the freshwater environments. Chemical reactions would occur in which the excess nitrogen and phosphorus would bond with oxygen, making the water hypoxic. The excess nutrients would increase the number of primary producers which would subsequently die and decompose which would remove oxygen and make the ocean water hypoxic.
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