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Queensland University of Technology

1. Schutze, Mark Kurt. The significance of genetic and ecological diversity in a wide-ranging insect pest, Paropsis atomaria Olivier (Coleoptera: Chrysomelidae).

Degree: 2008, Queensland University of Technology

Paropsis atomaria (Coleoptera; Chrysomelidae) is a eucalypt feeding leaf beetle endemic to southern and east coast Australia, and it is an emergent pest of the eucalypt hardwood industry. Paropsis atomaria was suspected to be a cryptic species complex based on apparent differences in life history characteristics between populations, its wide geographical distribution, and extensive host range within Eucalyptus. In this study genetic and ecological characters of P. atomaria were examined to determine the likelihood of a cryptic complex, and to identify the nature and causes of ecological variation within the taxon. Mitochondrial sequence variation of the gene COI was compared between populations from the east coast of Australia (South Australia to central Queensland) to assess genetic divergence between individuals from different localities and host plant of origin. Individuals from four collection localities used for the molecular analysis were then compared in a morphometric study to determine if observed genetic divergence was reflected by morphology, and common-garden trials using individuals from Lowmead (central Qld) and Canberra (ACT) were conducted to determine if morphological (body size) variation had a genetic component. Host plant utilisation (larval survival, development time, and pupal weight) by individuals from Lowmead and Canberra were then compared to determine whether differential host plant use had occurred between populations of P. atomaria; individuals from each population were reared on an allopatric and sympatric host eucalypt species (E. cloeziana and E. pilularis). Finally, developmental data from each population was compared and incorporated into a phenology modelling program (Dymex(tm)) using temperature as the principle factor explaining and predicting population phenology under field conditions. Molecular results demonstrated relatively low genetic divergence between populations of P. atomaria which is concomitant with the single species hypothesis, however, there is reduced gene flow between northern and southern populations, but no host plant related genetic structuring. Morphometric data revealed insufficient evidence to separate populations into different taxa; however a correlation between latitude and size of adults was discovered, with larger beetles found at lower latitudes (i.e., adhering to a converse Bergmann cline). Common garden experiments revealed body size to be driven by both genetic and environmental components. Host plant utilisation trials showed one host plant, E. cloeziana, to be superior for both northern and southern P. atomaria populations (increased larval survival and reduced larval development time). Eucalyptus pilularis had a negative effect on pupal weight for Lowmead (northern) individuals (to which it is allopatric), but not so for Canberra (southern) individuals. DYMEX(tm) modelling showed voltinism to be a highly plastic trait driven largely by temperature. Results from across all trials suggest that P. atomaria represents a…

Subjects/Keywords: cryptic species; local adaptation; phenotypic plasticity; seasonal plasticity; host specialisation; population genetics; Eucalyptus; forestry; predictive modelling; body size; BergmannÂ’s Rule

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APA (6th Edition):

Schutze, M. K. (2008). The significance of genetic and ecological diversity in a wide-ranging insect pest, Paropsis atomaria Olivier (Coleoptera: Chrysomelidae). (Thesis). Queensland University of Technology. Retrieved from https://eprints.qut.edu.au/16666/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Schutze, Mark Kurt. “The significance of genetic and ecological diversity in a wide-ranging insect pest, Paropsis atomaria Olivier (Coleoptera: Chrysomelidae).” 2008. Thesis, Queensland University of Technology. Accessed January 19, 2020. https://eprints.qut.edu.au/16666/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Schutze, Mark Kurt. “The significance of genetic and ecological diversity in a wide-ranging insect pest, Paropsis atomaria Olivier (Coleoptera: Chrysomelidae).” 2008. Web. 19 Jan 2020.

Vancouver:

Schutze MK. The significance of genetic and ecological diversity in a wide-ranging insect pest, Paropsis atomaria Olivier (Coleoptera: Chrysomelidae). [Internet] [Thesis]. Queensland University of Technology; 2008. [cited 2020 Jan 19]. Available from: https://eprints.qut.edu.au/16666/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Schutze MK. The significance of genetic and ecological diversity in a wide-ranging insect pest, Paropsis atomaria Olivier (Coleoptera: Chrysomelidae). [Thesis]. Queensland University of Technology; 2008. Available from: https://eprints.qut.edu.au/16666/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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