BSCI 106 Lecture Notes - Lecture 6: Intraspecific Competition, Commensalism, Nutrient Pollution
22 Sep 2015
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Consumption (one is benefitted and one is harmed) Commensalism one benefits and one in unaffected) Ammensalism (one is harmed and one is unaffected) Mutually negative interaction between individuals that results from resource limitation. Intraspecific competition (individuals among a species compete for the same resources) Interspecific competition (individuals from different species compete for the same resources) A +/- interaction in which one organism feeds on another. Sub-lethal predation: prey is not actually killed (caterpillars on a leaf) Consumption is predation (predator preying on prey), herbivory (insect preying on plants), and parasitism (parasite preying on host) Prey and predator affects n and distribution, community organization (species coexistence), and evolution by strengthening natural selection to develop advantageous features. Diverse predator forms and lifestyles have evolved. Parasites typically feed on just one or a few host individuals. Some have multiple hosts in a full life cylce. Ectoparasites live on surface of host (plants, fungi, insects on plant/fungus/insect hosts)
