BIOL 4150 Lecture 7: Lecture 7

• School: University of Guelph
• Department: Biology
• Course: BIOL 4150
• Professor: Andrew Mac Dougall

Document Summary

: those processes by which a species maintains or expands the distribution of a. Potential habitat that could support > 1, but constraints on dispersal. 3: locate more optimal habitat. reduced competition with parents reduced exposure to your parental competitors. Disadvantages: sub-optimal habitat (sink populations, metabolically expensive to produce off-spring. Dispersal strategies: r-type : large numbers, low parental care large failure rate but low cost. poor, k-type : low numbers, high parental care low failure; high cost good competitors competitors but higher odds but higher odds. Modes of dispersal: diffusion: the gradual movement of population across hospitable terrain for multiple generations the model: population grows at the edges by reproduction, slows in the middle by competition. Population front expands outward like a wave (diffusion theory). Ro= reproductive rate (seeds per generation) [ln= natural log] n = number of generations. R0= 500 seeds per generation within the population n = 300.