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Article
Phenotypic Plasticity of Native vs. Invasive Purple Loosestrife: A Two-State Multivariate Approach
Ecology
  • Young Jin Chun, Iowa State University
  • Michael L. Collyer, Iowa State University
  • Kirk A. Moloney, Iowa State University
  • Jason D Nason, Iowa State University
Document Type
Article
Publication Version
Published Version
Publication Date
6-1-2007
Abstract
The differences in phenotypic plasticity between invasive (North American) and native (German) provenances of the invasive plant Lythrum salicaria (purple loosestrife) were examined using a multivariate reaction norm approach testing two important attributes of reaction norms described by multivariate vectors of phenotypic change: the magnitude and direction of mean trait differences between environments. Data were collected for six life history traits from native and invasive plants using a split-plot design with experimentally manipulated water and nutrient levels. We found significant differences between native and invasive plants in multivariate phenotypic plasticity for comparisons between low and high water treatments within low nutrient levels, between low and high nutrient levels within high water treatments, and for comparisons that included both a water and nutrient level change. The significant genotype 3 environment (G 3 E) effects support the argument that invasiveness of purple loosestrife is closely associated with the interaction of high levels of soil nutrient and flooding water regime. Our results indicate that native and invasive plants take different strategies for growth and reproduction; native plants flowered earlier and allocated more to flower production, while invasive plants exhibited an extended period of vegetative growth before flowering to increase height and allocation to clonal reproduction, which may contribute to increased fitness and invasiveness in subsequent years.
Comments

This article is from Ecology 88 (2007): 1499. Posted with permission.

Copyright Owner
Ecological Society of America
Language
en
File Format
application/pdf
Citation Information
Young Jin Chun, Michael L. Collyer, Kirk A. Moloney and Jason D Nason. "Phenotypic Plasticity of Native vs. Invasive Purple Loosestrife: A Two-State Multivariate Approach" Ecology Vol. 88 Iss. 6 (2007) p. 1499 - 1512
Available at: http://works.bepress.com/jason_nason/10/