Pogil Answers Ecology

Topics: Water, Plant, Photosynthesis Pages: 5 (1593 words) Published: November 18, 2014
Ecology Pyramids
1.
a. Sunlight
b. 3190000kcal per square meter per year
2.
3.
a. .8%
b. Photosynthesis
4. By eating the organisms in the previous level
5. 400o0 kcal
6.
7.
8. 90% of energy is lost as heat as it is transferred through trophic levels 9. .6%
10. .09%
11. Only a tiny fraction of the original energy remains. The biomass would have to increase substantially if this system were to support another trophic level beyond the hawk 12. Since little energy is available for a single hawk, there would not be enough energy in an ecosystem to support a large population of hawks 13. Any photosynthesizing organism such as other trees, flowers grasses and moss 14. Omnivores, carnivores, anything that eats herbivores

15. Both have the same organisms in the same trophic levels. Both have the same number of trophic levels. Pyramid A has 2 Oak trees in the first trophic level while pyramid B has 100, 000 oak leaves in the first trophic level. The shape is different 16. In pyramid B, the number of organisms decreases from one level to the next. In pyramid A , the first level has a small number of organisms and the remaining levels follow the same pattern as in pyramid A 17. The oak tree is the same, but the caterpillars eat only the oak tree leaves 18. The producers in Pyramid A are two oak trees, but the actual trophic source on these two producers is tens of thousands of leaves. Only the leaves are eaten by the caterpillars, so the number of leaves is much more relevant than the number of trees 19. 11,000 g/m

20. 40g/m
21. The biomass decreases steadily
22. No. the mass of the producers is smaller than the mass of primary consumers. After that level, the biomass of each trophic level decreases steadily 23. Photoplankton reproduce rapidly so they can sustain a large number of primary producers 24. Biomass varies drasticalley with different organisms, the important issue is not the number of organisms, but now much of that mass is used as food. Another important issue is the speed with which food sources grow and reproduce

Nutrient Cycles
Water Cycle
1. Water
2. Atmosphere, surface water, groundwater, and oceans
3. In the aquifer
4. Evaporation and transpiration
5. Surface runoff and groundwater flow
6. Precipitation
7. As water vapor condenses, pollutants could be brought down to contaminate rivers, streams, lakes and oceans 8. Precipitation and runoff would be the most responsible processes. Precipitation carries air pollutants into water, while runoff collects any pollutants that are in our ground into the water supply. The action of percolation and transpiration can filter and clean the water. Evaporation and transpiration produce water vapor, which is probably the cleanest water on earth at this point. 9. Absorption and transpiration by plants and percolation

10. If the water on Earth is polluted anywhere in the cycle, it affects the water system in general. Percolation and plant use limited in what they can do to clean the water. If our atmosphere is polluted, it will the pollute the water. If there is pollution ion the ground, runoff will take it to the lakes, rivers and oceans. The water that is on Earth today is the same water that has been there from the beginning and will continue to be the water that is available to us. Carbon cycle

11. Carbon
12. Respiration from animals and plants, and combustion
13.
a. photosynthesis
b. plants and other photosynthetic organisms
14.
a. decomposing fungi, bacteria and worms
b. the carbon would not be recycled into the atmosphere; it would be locked in the waste and dead matter, leaving less and less carbon dioxide for photosynthesis, Meanwhile, the wastes and dead organisms would pile up 15.

a. coal, oil, peat and natural gas
b. fossil fuels
c. we burn them as energy sources
d. combustion
16. Using a gas stove, driving in a car, flying on an airplane, riding the bus to school, using an outdoor...
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