MIT1_018JF09_Lec13_Slides

MIT1_018JF09_Lec13_Slides - Lecture 13, 14 Population...

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Unformatted text preview: Lecture 13, 14 Population Ecology 1.018J 2009 The next three lectures Growth under unlimited conditions Resource limited growth Age- structured populations – “life tables” Human Population Growth How do you measure the size of a population? QUADRATS UNIFORM DISTRIBUTION RANDOM DISTRIBUTION CLUMPS quadrat size has to be very large for clumped distrubutions Mark and recapture method Mark Question: what is the population size, N? Step 1: Capture and mark M individuals Step 2: Release and wait Step 3: Capture S individuals in second sampling and count # that are marked (R) S o… . N (number in population) = S x M/R i.e. N = number in second sampling X originally marked recovered marked So how do we model population growth? Growth Rate Examples Organism Organism r (day -1) Doubling Time Doubling Time Bacteria 58.7 17 min Beetle 0.101 6.9 days Rat 0.0148 46.8 days Cow 0.001 1.9 years Birch Tree 0.00075 25 years MIT OpenCourseWare http://ocw.mit.edu 1.018J / 7.30J Ecology I: The Earth Fall 2009 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms. ...
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This note was uploaded on 11/11/2011 for the course BIO 7.344 taught by Professor Bobsauer during the Spring '08 term at MIT.

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MIT1_018JF09_Lec13_Slides - Lecture 13, 14 Population...

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