BIOL 180 Lecture 27:02 & 04:03

According to the records of the hudsons bay company

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Unformatted text preview: I Figure 18.2 Population cycles of predators and their prey may be highly synchronized. According to the records of the Hudson’s Bay Company, population cycles of the lynx and the snowshoe hare track each other dosely. After D. A MacLulidi, University of Toronto Studies, Biol. Ser. No.43 (1937). Predation, Grazing, and Disease Chapter 8 tor and the ics of their underlying this estab s, shortage verride this , however, e effects of s of spatial hole story; example to tors with a gure 8.13). sume many f prey thus of predators refore gives numbers of sure off the prey—and erlying tenundance— he response in response abundance .) A simple y the same I Figure 8.13 The underlying tendency for predators and prey to display coupled oscillations in abundance usa result of the time delays in their responses to each other’s abundance. can generate regular cycles in the abundance of both interacting populations, and they can reinforce such cycles if they exist for some other reason; but attributing a cause to 215 HERBIVORY - Herbivore = organism that consumes living plants - Typically remove tissue but rarely kill plants. - Champions are? Adaptations/Defense Of Plants - Plants can’t run away or hide. Types Of Defenses 1. Mechanical defenses - On plant surface - spines, thorns, prickles, sticky gums and resins, tough seed coats etc.. \ * 2. Chemical Defenses - Toxic, noxious, and nutrient-reducing compounds inside plant tissues. Ex lignin tannins - reduces digestibility of tissues - in vacuoles, bind to proteins, inactivate digestive enzymes in herbivore - gets sick secondary metabolites -...
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