Geography 2320A/B Study Guide - Midterm Guide: Interspecific Competition, Ecological Niche, Office Open Xml

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Describe what geographic range is and how it is mapped. Discuss abiotic and biotic factors that limit species to their geographic range. Species may not be found over entire geographic range: clumpy/patchy distribution. The geographic range as a reflection of the ecological niche. Species distributions we need to know where species are to understand what is happening to them now and what could happen in the future. 3 types of range maps: outline (generalized), dot maps (limited inference), contour maps (underlying data, interpolation) Population growth malthusian theory all organisms have the inherent potential to increase their numbers exponentially-however, because resources limit growth, and many environments are unsuitable, no organisms actually increase indefinitely. Fundamental(potential range) vs realized (actually used) niche-of a species. Factors that determine the geographic range of a species: Interspecific competition: a relationship in which the populations of 2 or more species are affected adversely. Macro parasites (flatforms, lice, fleas, ticks, fungi, rusts)

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