BIS 2B Lecture Notes - Lecture 2: Hadley Cell, Thermal Equator, Isthmus Of Panama

• School: UC-Davis
• Department: Biological Sciences
• Course: BIS 2B
• Professor: Mark Schwartz; Sharon Strauss

Document Summary

Morphological species : individuals that are grouped into species based on their similar physical appearance. Works well when each species" characteristics are consistent and unique (non-overlapping) Linnaeus used morphology to create a classification system based on binomial nomenclature . Organisms are put into hierarchical categories of decreasing similarity. Pros : often evolutionary relationships (shared genes) practical reflects simple, and. Cons : does not work when single species is highly variable in appearance, similar traits may have evolved independently. Biological species concept : groups of actually or potentially interbreeding individuals that are reproductively isolated from other groups. Reproductive barriers may be hard to recognize. Distribution of species~ species are not randomly distributed. Biodiversity hotspots : places with many species that are endemic , or occur in no other regions. Climate: average and annual variation in temp. and precipitation in a given region over long-term period- large effect on vegetation.