BIOL 1070 Study Guide - Midterm Guide: Biogeography, Physiognomy, Adaptive Management
3 Apr 2016
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Global biodiversity: number of species; net outcome of diversification and extinction. Endemism: it evolved and can only be found in this region. Range expansion: it evolved elsewhere (relatively nearby) and then expanded its range to also include another area. Range shift: it evolved elsewhere and used to be found elsewhere, but its range shifted to include only the current distribution and not the former distribution. Long-range dispersal/non-native/introduced/invasive: it arrived from somewhere else not nearby. Vicariance: it evolved elsewhere, but then the physical landscape itself changed. If one preyed-on species goes extinct, the niches of other species in the ecosystem will shift. A bunch of trees creates a forest ecosystem, but not a forest. Same alpha diversity = same number of species between habitats. Gamma diversity: total number of species across all habitats. Species evenness: relative abundance of species in an area shannon diversity. Abiotic factors: factors of the environment that are non-living.
