BIOSC 0370 Lecture Notes - Lecture 19: Biological Pest Control, Herbaceous Plant, Detritivore
22 Dec 2015
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Document Summary
Predation, parasitism and herbivory (ch 14: parasites: consume parts of a living prey organism or host: A parasite may negatively affect the host but does not directly remove (kill) it from the population: parasitoids: consume the living tissues of their hosts, eventually killing them or the true aliens: Parasitoids combine traits of parasites and predators. May act as predators (eating whole plants) or as parasites (eating: herbivores, grazers: eat grasses and herbaceous vegetation, browsers: eat woody vegetation, detritivores: consume dead organic material & wastes of other species. Are important in the recycling of nutrients within ecosystems resources but may indirectly influence these populations. parts of plants): Prickly pear cactus & cactus moth: basis for biocontrol. Prickly pear cactus accidentally introduced into australia and spread all. Biocontrol by humans: brought cactus moth in to eat all prickly pear. Biocontrol tells us little about the role that herbivores play in native over the country, outcompeting native species (grasses) cactus communities.
