CS
2018_11_30_BIOL2050_lecture12.pptx

# Sample problems answer below 5 a predator that spends

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5. A predator that spends time handling each prey item and only feeds on one type of prey would exhibit which type of functional response curve? prey density predator feeding rate A B C
Carnivore 1 Carnivore 2 Herbivore 1 Herbivore 2 Plant 1 Plant 2 6. In this food web, it is likely that a) removal of herbivore 2 would have a positive effect on herbivore 1 b) removal of herbivore 2 would have a negative effect on plant 1 c) removal of carnivore 2 would have a negative effect on carnivore 1 - - compe- tition

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7. According to the MacArthur and Wilson Theory of Island Biogeography, the rate at which an island is colonized by new species is influenced by the island’s a) degree of isolation from the mainland b) size c) current species richness d) all of the above e) a) and b)
8. In a predator-prey system that follows Lotka- Volterra dynamics, the prey population is stable (neither increasing nor decreasing) when the predator population is 10. The intrinsic rate of increase, r, for the prey is 0.4/yr. What is the predator efficiency constant, c? dN/dt = rN N t = N o e (rt) E = eP C = [mP(1-P)] dN/dt = r max N [(K-N)/K] N t = K / [1 + e (a-rt) ] a = ln [(K-N o )/ N o ] dN 1 /dt = r 1 N 1 [(K 1 - N 1 - N 2 )/K 1 ] dN 2 /dt = r 2 N 2 [(K 2 N 2 - N 1 )/K 2 ] dN prey /dt = rN prey - cN prey N pred dN pred /dt = b(cN prey N pred ) - dN pred N e = cN prey T s N e = cN prey T/(1+ cN prey T h )

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9. In the model of species richness shown below, species richness can be increased by any of the following except n = niche breadth o = niche overlap R = range of resource
10. Countries that transition from undeveloped to developing typically exhibit

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preindustrial ----------developing---- ----------developed---- r
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• Winter '15
• jane smith

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