Community Ecology I-PRS - Georgia Tech School of Biology...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Biology 1510/1511 Georgia Tech School of Biology Fall 2008 Community Ecology
Background image of page 1

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

View Full DocumentRight Arrow Icon
Biology 1510/1511 Georgia Tech School of Biology Fall 2008 Communities -a group of populations of different species living close enough to interact - classify interactions according to their impacts on the participants - positive interactions (+) improve the survival and reproduction while negative (-) interactions have the opposite effect - competition, predation, parasitism, mutualism
Background image of page 2
Biology 1510/1511 Georgia Tech School of Biology Fall 2008 Competition - a -/- ecological interaction - common resource use - resources are in limited quantity - resource use leaves less for self and others - reduces growth and reproduction
Background image of page 3

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

View Full DocumentRight Arrow Icon
Biology 1510/1511 Georgia Tech School of Biology Fall 2008 Types of competition 1 st ask who…. .2 nd ask how intraspecific competition – between conspecifics, implicit in the idea of “K” interspecific competition – between members of different species each individual adversely affects another in the quest for food (nutrients), living space, mates or other common needs
Background image of page 4
Biology 1510/1511 Georgia Tech School of Biology Fall 2008 Types of competition Interference competition: resources are defended direct interaction between species A and B - resource defense entails costs and you might not succeed A B R
Background image of page 5

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

View Full DocumentRight Arrow Icon
Biology 1510/1511 Georgia Tech School of Biology Fall 2008 Interference competition Lycaon pictus – the African wild dog - hunts 3 – 4 hrs. / day - What if they lost 25% of their food to hyenas? - spotted hyenas often steal food from the wild dogs
Background image of page 6
Biology 1510/1511 Georgia Tech School of Biology Fall 2008 Interference competition Crocuta crocuta – the spotted hyena - wild dogs and spotted hyenas cannot stably coexist - the wild dogs are already operating close to their physiological limits, therefore…… - estimated that the dogs would have to hunt 12 hrs. / day to off-set costs
Background image of page 7

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

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/04/2009 for the course BIO 1510 taught by Professor Unknown during the Spring '07 term at Georgia Institute of Technology.

Page1 / 30

Community Ecology I-PRS - Georgia Tech School of Biology...

This preview shows document pages 1 - 8. Sign up to view the full document.

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