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Communities - Coggle Diagram
Communities
Genetic Drift: random loss of alleles
Mutation: Change in one of nucleic acids.
Nonrandom Mating: plants choose their mates.
Gene Flow: movement of alleles into and out of a population.
Species Interaction within a community
Community:a group of actually or potentially interacting species living in the same location.
Growth models:r = intrinsic growth rate
N = population size
K = carrying capacity
dN/dt = population change over time
Lotka-Voltera: explains how predator and prey fluctuate around one another populations
Prey: dN/dt=rN-aNP
Predator: dP/dt=faNP-qp
Population Genetics
Gene Pools
All alleles in every gene in a population make up a gene pool
Allele Frequency: # alleles of one type divided by total # of alleles
Genotype Frequency: # genotypes of one type divided by total # of individuals
Hardy Weinberg Equation:predicts an equilibrium-unchanging allele and genotype frequencies from generation to generation
Assumptions of HW:
No selection
No mutation
No migration
Large population
Random Mating
Microevolution: changes in pop. gene pool from generation to generation
Exponential Growth: dN/dt=rN
Logistic Growth: dN/dt=rN (1-N/K)
Life History: predicting whether a population will grow or shrink
Life tables summarize birth and death rates for organisms at different stages in their life.
x = age
Nx= number of individuals alive at age x
Sx= proportion of individuals of age x that survive to age x+1;
Nx+1/Nx
lx= proportion of individuals that survive from birth (age 0) to age x;Nx/N0
Fx= average number of offspring born to a female while she is age x
lx(Fx) = average number of offspring per capita at age x
lx(Fx)x = average number of offspring per capita at time x, weighted by age x
Population Growth