test 3 review questions

test 3 review questions - Lotka-Volterra competition models...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Lotka-Volterra competition models 1. derive intraspecific competition(-N1 and –N2); must add interspecific competition (-α12N2 and – α21N1) 2. isoclines of zero population growth- where everywhere along the lines, population growth is stopped. N1=K1-a12N2 and N1=k2-a21N1 3. 4. intraspecific competition must be stronger than interspecific competition. All growth trajectories lead to the point where the isoclines of zero population growth cross. , a point where the abundances of both species is greater than zero: k2/a21>K1 and K1a12>K2; each species must be its own worst competitor; each species must be able to recover from low density, when the other is at carrying capacity 5. Gleason: relationship of co-existing species due to the result of similar tolerances, resource requirements, and chance Elton: likened species to a member of a human community; across communities there are similar roles; each species has a role come roles exist across multiple communities- dominant producer, top vertebrate carnivore. Interspecific competition can restrict the niches of populations in nature Chapter 13 niche 1. Grinnell: An organism’s home, or where it lives; coined the term niche; potential distribution in the absence of any interspecific interactions (competition, predation, etc.) Elton: likened species to a member of a human community; across communities there are similar roles; each species has a role come roles exist across multiple communities- dominant producer, top vertebrate carnivore. Gause: competitive exclusion principle- two species with identical niches cannot coexist indefinitely Hutchinson: fundamental niche- a hypervolume which specifies the values of the n environmental factors permitting a species to survive and reproduce. Realized niche- more restricted conditions which is the actual niche of the species whose distribution is limited by biotic interactions such as competition, predation, disease, and parasitism 2.Hutchinson: fundamental niche- a hypervolume which specifies the values of the n environmental
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

test 3 review questions - Lotka-Volterra competition models...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online