Biology 2483A Lecture : Competitive Exclusion

46 views1 pages

orchidotter238

26 Dec 2011

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Grew species in jars grew them up alone then but them in competition. Puts 2 species together one species reaches logistic and the other is competitively excluded using resources in the same way therefore they cant coexist. 2 other each reaches k; even though one is higher they are coexistingturbid quality of light is changing; relative amount of red/green light is determining this species abundance. Having a lot of the other species present slows growth rate. N1 = species one n2 = species 2. Ragwort abundane in red switches direction one is common and the other isnt common. The rest of the competition is grass and forbs. If you have a superior competitor (rag) that gets fed on by the herbivore and the herbivore doesn t get fed on then the strength of the competition will switch. Don t compete well with everything else present there. Waves knock everything out and allow them to temporaryily grow.

Related Questions

Which of the following statements supporting the argument that competition is extremely important in ecological systems is FALSE?

-Competitor species show niche differentiation in space, time, and/or diet.

Coexisting species are always engaged in competitive interactions.

Competitors show negatively associated distributions.

Competitive release has been documented in a number of areas.

Coexisting species that utilize the same resources within habitats may coexist by partitioning those resources.

pinkwolf400

1)In the Arroyo Seco, the Western Toad feeds on beetles, bees, and small aquatic insects. The Bull Frog has been introduced and eats the same foods. The based on this information interaction between these two species can best be described as:

2)Introduced species such as the Polyphagous Shot Hole Borer can damage the communities they are introduced to by:

changing communities to have a uniform distribution

providing food for native species

increasing species richness

spreading new parasites and diseases

3)Species that compete for the same resources often switch to either use different resources or find ways to reduce competition. Why is this often true?

introduced (exotic species) are always going to be the best competitors

to avoid parasites

direct competition harms both species, even the superior competitor

competition only benefits one of the species

Consider three different scenarios. In all three scenarios, theenvironment fluctuates between one of two states: state 1, in whicha larger fish species outcompetes a smaller fish species; and state2, in which the smaller species outcompetes the larger species. Inall three scenarios, the time spent in either state, as well as thedegree to which one species outcompetes the other, is roughly thesame. Thus, on average, the larger and the smaller species arecomparable in their competitive abilities. In scenario A,environments switch on average every three years, and competitiveexclusion usually takes four months. In scenario B, environmentsswitch about every five months, and competitive exclusion usuallytakes about four months. In scenario C, the environments switchabout every three weeks, and competitive exclusion usually takesabout two years. Assuming that Hutchinson

plumlouse794

Biology 2483A Lecture : Competitive Exclusion

Document Summary

Get access

Related Documents

Biology 2483A Lecture Notes - Lecture 11: Character Displacement, Natural Selection, Competitive Exclusion Principle

Biology 2483A Lecture Notes - Lecture 18: Species Richness, Diatom, Species Pool

Biology 2483A Final: Final notes from lecture 11 - 24

Related Questions