BISC302 Lecture Notes - Lecture 15: Lamprey, Logistic Function, Allelopathy
8 Nov 2016
School
Department
Course
Professor
Document Summary
Affect the structure of the community and the size, density, dispersion, etc of populations. Within a species -> realm of social behavior/behavioral ecology. Ex: stomach bacteria, pollinators and plants they pollinate, lichens (required mutualism) Predation - one individual benefits while the other is harmed. Commensalism - one individual benefits while the other is unaffected. Amensalism - individual is harmed and the other is unaffected. Not really because not directly taking away from the other individual, just outcompeting it. Reach an unstable equilibrium (eventually one or the other wins) Include a coefficient of competition alpha representing the effect of species 2 on species 1 - multiplying n2 by alpha12 makes it the equibalent of individuals in species 1 dn1/dt = r1n1{(k1-[n1+alpha12n2])/k1} Week 9 page 1 for species 1 including species 2 is. And for species 2 population growth dn2/dt = r2n2 {(k2-[n2+alpha21n1])/k2} Generates graphs with 4 possible arrangements of isoclines (lines with no increase or decrease in population size)
