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Precision of herbivore tolerance experiments with imposed and natural damage
Södertörn University, Avdelning Naturvetenskap.ORCID iD: 0000-0002-0260-3978
2003 (English)In: Evolution, ISSN 0014-3820, E-ISSN 1558-5646, Vol. 57, no 3, 677-680 p.Article in journal (Refereed) Published
Abstract [en]

Tiffin and Inouye (2000) discussed the use of natural and imposed (controlled) damage in experiments of herbivore tolerance. They constructed a statistical model of the effect of herbivory on plant fitness, including damage level and an environmental factor as the independent factors, in which tolerance is defined as a slope of the regression line when damage level is regressed with plant fitness. They claim that while experiments with imposed damage are more accurate (i.e., they give a more correct estimate of tolerance), experiments with natural damage are more precise under a wide range of parameter values (i.e., tolerance estimates explain a larger part of variation in fitness). I show, however, that experiments with imposed damage are less precise only when an experimenter uses an experimental design that has weaker statistical power than in experiments with natural herbivory. The experimenter can nevertheless control the damage levels to optimize the experimental designs. For instance, when half of the experimental plants are left undamaged and the other half treated with maximal relevant damage level, experiments with imposed damage are almost always much more precise than experiments with natural damage.

Place, publisher, year, edition, pages
2003. Vol. 57, no 3, 677-680 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:sh:diva-6049DOI: 10.1111/j.0014-3820.2003.tb01559.xISI: 000182193800023PubMedID: 12703957Scopus ID: 2-s2.0-0037361012OAI: oai:DiVA.org:sh-6049DiVA: diva2:395453
Available from: 2011-02-07 Created: 2011-02-07 Last updated: 2016-09-29Bibliographically approved

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CiteExportLink to record
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Cite
Citation style
  • apa
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  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
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  • de-DE
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  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
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  • asciidoc
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