BIO205H5 Lecture Notes - Lecture 13: Rodent, Ulna
Document Summary
Lecture 13: competition: particular types of interactions between populations. Competition is everywhere: asterionella fornosa, synedra ulna, housing made out of silicates. Diatoms require silicate: decrease populations means decreasing silicates, other diatoms might compete for silicate, silicate drops quickly when both species are there. Synedra stayed at the same level of populations as when grown by itself; there"s something in them that allows for them to compete better. Ant colonies increased by 71% compared to control plots. Plots with only rodents or ants had about the same seed density as control plot. If we want more realistic population growth models, we need to include competition. The lotka-volterra models predict outcomes for different levels of competition and k: alpha is the competition coefficient and beta for the second species, the competition coefficient alpha quantifies the per capita effect of species 2 on species. How do we best describe species interactions.
