Midterm1-Spring2008-key

Midterm1-Spring2008-key - Name: Key Page 1 of 7 Exam...

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Name: Key Page 1 of 7 Exam instructions: --Write your name on all the pages --Make sure that all 7 pages are attached. --You may not use calculators or other electronic aids. The math needed to solve a problem should be relatively simple. If you can't do the math, just show what needs to be calculated (e.g., "answer = 0.5 x .3") --If you get hung up on a problem, skip it; return to it after you’ve answered the “easy” problems. INTRODUCTORY ECOLOGY AND GENERAL ECOLOGY PCB 3034/4044 Spring 2008 EXAM I PAGE POINTS POSSIBLE SCORE 2 20 _____ 3 20 _____ 4 18 _____ 5 20 _____ 6 12 _____ 7 10 _____ TOTAL 100 _____
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Name: Key Page 2 of 7 The following short answer questions are worth 2 points each. 2-1. Large, convective atmospheric circulation patterns at 0-30 N and 0-30 S are called Hadley Cells . 2-2. The spectral quality of solar energy coming into the atmosphere is dominated by shortwave radiation. In contrast, the energy re-radiating out from the planet is dominated by longwave radiation. 2-3. Name the four very common elements that make up most of the life on this planet: Carbon, Hydrogen, Oxygen, Nitrogen . 2-4. About 31 % of solar energy directed at Earth is reflected back into space. 2-5. Tree migration into tundra is expected to decrease /increase (circle one) wintertime albedo, decreasing/ increasing regional (and possibly global) temperatures. 2-6. An ecotone is a boundary between two biomes. 2-7. The biome that stores the most carbon in live plant biomass is tropical forests . 2-8. The Redfield ratio is based on the observation that the growth of algae with an N:P ratio >14:1 responded to phosphorus addition, while the growth of algae with and N:P ratio <14:1 responded to N addition. 2-9. The major source of phosphorus inputs to ecosystems is rocks, lithosphere, weathering or parent material , while the major source of nitrogen inputs is atmosphere, N2, biological N fixation . 2-10. The nitrogen trace gas nitric oxide, NOx is important for O 3 chemistry in the troposphere, while nitrous oxide, N2O is a long-lived greenhouse gas.
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Name: Key Page 3 of 7 Short answer questions; points as indicated. 3-1. An insectivorous lizard occurs on several islands off the coast of Florida, but is absent from the mainland. Spiders are uncommon on the islands (but common on the mainland). a) List one hypothesis to explain the distributional pattern. Your hypothesis can focus on the lizard or the spider or both ( 5 points ). Many options. Here are several (yours just has to clear and potentially testable): Spiders are rare on island due to predation by lizards (note: I’m assuming that an “insectivorous” lizard also eats spiders). Lizards are rare on mainland due to predation by domestic cats that are
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This note was uploaded on 06/04/2011 for the course PCB 4043 taught by Professor Osenberg during the Spring '10 term at University of Florida.

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Midterm1-Spring2008-key - Name: Key Page 1 of 7 Exam...

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