BIOL 3130 Study Guide - Midterm Guide: Inbreeding Depression, Character Displacement, Agropyron Cristatum

• School: University of Guelph
• Department: Biology
• Course: BIOL 3130
• Professor: Andrew Mac Dougall

Document Summary

Explaining the laitudinal gradient of species diversity has long been and sill remains the holy grail" of ecology and evoluionary biology . Problem in the tropics: so much overlap and breadth that species seem to defy cep-compeiion exclusion principle (similarity so great, compeiively indisinguishable) . Intense enemy atack due to hich resources and stable enviro condiions drive character displacement (arms race specializaion). In the absence of predaion, compeiion runs unchecked (density dependence: more abundant, more atacked). Applies ot plancts and animals, evolved trats of atack, tolerace, and acoudance (special adaptaion against predaion tends to be secondary plant chemicals) Distribuion: higher performance growing among strangers (heterospeciics) and family (conspeciics) form of pretecion + rarity advantage. Coexistance: prevents dominant species from excluding sub species . Pressure from this if pop is more dispersed. Evoluion: selecion agent drives trait divergence and specializaion. Adaptaion: arms race greater pop density = greater odds of atack.