BIOB50H3 Lecture Notes - Lecture 8: Ecological Niche, Commensalism, Parasitism
Document Summary
Historical factors: climate, temperature, precipitation, competition, consumption, predation, parasitism, mutualisms, commensalisms, glaciation, dispersion. These two barnacle species can be found in the intertidal zone independently (same fundamental niche), but cannot coexist there (different realized niche). Example of competition removal of neighbours means more survival. The situation can easily change and depends on the context, for example, in a desert, sunlight is probably a physical condition and not a resource because it won"t be depleted. Document created: 2018-09-04: types of competition, species that compete generally do so in four distinct ways, temporal separation: exploitation and interference, species separation: intraspecific and interspecific. One competitor removes resources before the other can get to them (indirect) Two competitors fight over access to resources (direct interaction) Competiton among individuals of the same species for resources. Competition between individuals of different species for resources: can be either interference or exploitation. Interspecific interactions can lead to extinction in extreme cases (in contrast to intraspecific interactions)
