BIOL 127 Lecture Notes - Lecture 11: Scramble Competition, Logistic Function
Document Summary
Increase the density, how many adults do we get: set up a table, severe scramble competition! Cohort of insects can be completely gone due to severe scramble competition: can lead to fluctuations in population size, contest competition, replica cups with of food. Detection of density dependence in nature: this is one of the learning outcomes of the course!!, 4 types of population growth, geometric growth. Inverse density dependence (density induced positive feedback: rapid density dependence (density induced negative feedback, delayed density dependence. Some time lag that is influencing the population growth of these: his theory only focuses on numbers! populations, berryman"s theory examines the dynamics, it does not attempt to identify the biological mechanisms [], other potential mechanisms: Plant-herbivore and predator-prey interactions: often get delayed density dependence, time lag for the interactions between predator and prey. Physiological or genetic polymorphisms: manifested in themselves.
