INTERACTION SPECIES 1 SPECIES 2COMMENTS NEUTRALISM00NEITHER POP AFFECTS THE OTHER COMPETITION--INHIBITION OF EACH SPECIES BY THE OTHER - PowerPoint PPT Presentation

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Species Interactions. INTERACTION SPECIES 1 SPECIES 2COMMENTS NEUTRALISM00NEITHER POP AFFECTS THE OTHER COMPETITION--INHIBITION OF EACH SPECIES BY THE OTHER AMENSALISM-0SPECIES 1 IS INHIBITED, SPECIES 2 IS NOT AFFECTED PARASITISM

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INTERACTION SPECIES 1 SPECIES 2COMMENTS NEUTRALISM00NEITHER POP AFFECTS THE OTHER COMPETITION--INHIBITION OF EACH SPECIES BY THE OTHER

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Species Interactions

INTERACTION SPECIES 1 SPECIES 2COMMENTS

NEUTRALISM00NEITHER POP AFFECTS THE OTHER

COMPETITION--INHIBITION OF EACH SPECIES BY THE OTHER

AMENSALISM-0SPECIES 1 IS INHIBITED, SPECIES 2 IS NOT AFFECTED

PARASITISM

PREDATION+-SPECIES 1 BENEFITS AT THE EXPENSE OF SPECIES 2

COMMENSALISM+0SPECIES 1, THE COMMENSAL, BENEFITS WHILE SPECIES 2, THE HOST, IS NOT AFFECTED

MUTUALISM++INTERACTION IS FAVORABLE TO BOTH SPECIES


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PREDATION

  • Predation - consumption of live prey by an organism, predators attach several prey individuals over their lives.


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PREDATION

  • Predation - consumption of live prey by an organism, predators attach several prey individuals over their lives.

  • Grazers - attack many prey individuals but only consume parts of the prey, and attacks are rarely lethal.

  • Parasites - consume only parts of prey, rarely lethal, attack only one or a few prey over parasite’s lifetime.


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Predator Effects on Prey


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http://biology.usgs.gov/pierc/PLLindseyPredator1.htm


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http://greateryellowstonescience.org/files/pdf/Laketrout_Almanac_YELL.pdf


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Predators have minor effect on prey populations if:

  • Predators take prey individuals with the lowest fitness. (e.g. muskrat)


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Predators have minor effect on prey populations if:

  • Predators take prey individuals with the lowest fitness. (e.g. muskrat)

  • Prey may compensate for predation by increased survival and reproduction of survivors. (e.g. coyote)


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Predators have minor effect on prey populations if:

  • Predators take prey individuals with the lowest fitness. (e.g. muskrat)

  • Prey may compensate for predation by increased survival and reproduction of survivors. (e.g. coyote)

  • The effects of one species of predator are replaceable by another predator species. (e.g. wolves, bear, moose)


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Prey Effects on Predators

Kills per predator

FUNCTIONAL PREDATOR RESPONSE - Changes in predator consumption rates associated with changes in prey density.


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Prey Effects on Predators

NUMERIC PREDATOR RESPONSE - Changes in predator density in response to prey density.


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Predator and Prey Population Models


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Predator and Prey Population Models


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Predator and Prey Population Models


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Predator and Prey Population Models


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