BIOL2060 - Lecture 29 - Nov 22, 2013

St helens was facilitation inhibition or tolerance

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Unformatted text preview: ession on Mt. St. Helens •  Erupted May 18th,1980 •  Experiment to test whether the mechanism of succession at Mt. St. Helens was facilitation, inhibition or tolerance http://vulcan.wr.usgs.gov/Volcanoes/MSH/Maps/may18_ashmap.html 9 lupine - early succession species How do communities change over time? Testing mechanisms of succession on Mt. St. Helens Treatments: •  Control – no lupines •  Lupines killed with herbicide and removed •  Lupines killed but litter left in place •  Lupines intact Early successional species Late successional species Late successional species Lupinus (N2 fixer) Anaphalis Chamarion aka: pearly everlasting aka: fire weed 10 evidence for inhibition: -lupin inhibits succession of chamarion + anaphalis most important bars: control + LIVE How do communities change over time? Testing mechanisms of succession on Mt. St. Helens -Survival of Anaphalis and Chamarion highest in control treatment black bar - chamarion striped bar - anaphalis -Evidence for...
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