Outline 7 - Predation&Mimicry

Outline 7 - Predation&Mimicry - BSCI106 Dr. Sara Via...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
BSCI106 Outline 7 Fall 2008, p. 1 Dr. Sara Via Species interactions II – Consumption (predation and herbivory) Does predation affect prey population size? Could predation regulate prey population size ? Predation is usually density-dependent- good start Predation CAN keep prey pop. well below carrying capacity. Pesticide is counterproductive - predators killed! Predators can drive prey “locally extinct” Mite alone- cycles Efficient predator quickly kills all the prey. Could these two species ever coexist? Predators and prey can coexist if there are places for prey to hide (refugia) Huffaker’s orange experiment complex environment -- trays of oranges and orange rubber balls. some predator time is wasted looking for prey Do prey always go extinct? Predators and prey can coexist if there are places for prey to hide (refugia) Huffaker’s orange experiment Hide and seek - Predator efficiency reduced in complex habitats, Useful in biological control!
Background image of page 1

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

View Full DocumentRight Arrow Icon
BSCI106 Outline 7 Fall 2008, p. 2 Dr. Sara Via Competition and predation can interact Predation releases populations from competition (why) But if prey population gets too big to be controlled by predator– i.e., outbreak and overshoot of K Competition
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 5

Outline 7 - Predation&Mimicry - BSCI106 Dr. Sara Via...

This preview shows document pages 1 - 3. Sign up to view the full document.

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