BIS 2B Lecture Notes - Lecture 3: Thermal Equator, Intertropical Convergence Zone, Allopatric Speciation

• School: UC-Davis
• Department: Biological Sciences
• Course: BIS 2B
• Professor: strauss,gerhart

Document Summary

Evenness number of individuals in a species in comparisons to those of other spec. Morphological species concept: individuals grouped based on similar physical a. Pros: easy to apply in research; reflects basic evolutionary relationships. Cons: sucks when single species vary great in appearance or when differe carry same appearance. Biological species concept: groups that are reproductively isolated from other g. Can potentially interbreed meaning maybe not in natural habitat but brought to laboratory. Cons: hard to apply to asexual organisms who don"t interbreed and repr barriers are hard to discern at times. Biodiversity hotspots where some species only exist there. 1% of earth"s area has 44% of plant diversity and 35% of vertebrates. Climate is average precipitation + temperature over weeks and years. Affects vegetation which affects dispersion of many species. Differential heating of earth"s surface due to the tilt which creates a thermal equator. Solar radiation depending on season and position around the sun (aka hadley cell c.