BIOL 4253 : Exam3 Chp 13 14
Document Summary
Intraspecific vs. interspecific competition: competition with members of own species, competition between individuals of two species that reduces the fitness of both. Intraspecific competition among herbaceous plants: plant growth rates and weights have been found to increase in low density populations, competition for resources is more intense at higher population densities, usually leads to mortality among competing plants, self-thinning. Grow a sege in soils with different amounts of nitrogen. When you put in high densities there isnt enough nitrogen for anybody. Low nitrogen you get low amount of biomass. High nitrogen you get a lot of biomass. The plants stay small until some of them die; this death process is called self-thinning. This predicts that plants will decrease in pop density, but the total mass increases. While we are self thinning the number of individuals" decreases, but the biomass is going to go up for the total biomass in this area. If you look at the weight per plant.
