ENV100Y5 Lecture Notes - Lecture 17: Herbivore, Coevolution, Carrying Capacity
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ENV100Y5 Full Course Notes
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Document Summary
Unregulated population: steady growth rates cause exponential population growth, cannot be sustained indefinitely, small population and ideal conditions. Carrying capacity: maximum population size of a species that its environment can sustain. Density dependent factors- limiting factors whose influence is affected by population density disease parasite etc. Density-independent factors: limiting factors unrelated to population density, natural disasters. Resource partitioning-species divide shared resources in different ways. Mutualists help one another, symbiosis= live in close contact. Parasitism: organism depends on host for food or other benefit. Herbivory: animal feed on tissues of plants. Herbivores exploit plants: may not kill it but affects its growth etc. Defences: chemicals, thorns, hairs, other animals protect it. Coevolution= antagonistic species become locked in a duel of escalating adaptations.
