BIOL 2060 Lecture Notes - Lecture 16: Arceuthobium, Herbivore, Haustorium
Document Summary
Exploitative interactions: one species benefits at the expense of the other (1) predation (2) herbivory (3) parasitism. Types of exploitative interactions (a) categories of heterotrophic organisms: Omnivore consumes producers & consumers (b) functional classifications of predator: Seed predator/planktivore entire plants/plankton (anything that eats seeds) A non-mutual relationship between species, where the parasite (+) benefits at the expense of the host (-). Parasites are usually smaller than hosts, which they live on/in for an extended period, & do not kill them. Parasites show a high degree of specialization, & reproduce at a faster rate than their hosts. Macroparasites (protozoa, helminths, mistletoe) vs. microparasites (viruses & bacteria) Host response: inflammatory response (body tissue responds quickly) &/or immune response (attacks foreign cell proteins can flip coat proteins) Ectoparasites are those that live on the host"s skin within the protectivee cover of feathers & hair. Endoparasites live within the host (beneath skin, bloodstream, mouthparts, gills) Blood parasitism: laying eggs in host"s nest.
