BIOL208 Lecture Notes - Nectar Robbing, Red Queen Hypothesis, Coevolution
9 Apr 2014
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*defence may be constitutive or induced: *constitutuve ex cactus spines. *always present (benefit of defence as a cost to opportunity: induced defence is defence only in the presence of danger. *if there is no risk, the maintenance cost dedicated to defence can be allocated elsewhere: plant communication, when a predator is around, *common, ex. Between tobacco plants and between tobacco plants and other species: ecology of fear, *consumptive vs non-consumptive effects of predation. *consumptive effects of predation = eating of prey: *a type of non-consumptive effect of predation is: *the trade-off between foraging and risk of predation: *death is actually rare most prey don"t get eaten, ex. sea cows. Graze on poor-quality seaweed beds in the presence of predators. Graze on high-quality seaweed beds in the absence of predators. *this is an example of non-consumptive effects of predation: *it is likely non-consumptive effects of predation that drive population dynamics.
