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    Biogeographical Origins of Hawaiian Diplopterygium pinnatum by Long Distance Wind Dispersal

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    2006_ChristensenK_THS_000703.pdf (2.819Mb)
    Author
    Christensen, Kris
    Advisor
    Jennifer Glowienka; John Addis; Kay Satre
    Date of Issue
    2006-04-01
    Subject Keywords
    Hawaiian fern, Diplopterygium pinnatum
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    URI
    https://scholars.carroll.edu/handle/20.500.12647/2932
    Title
    Biogeographical Origins of Hawaiian Diplopterygium pinnatum by Long Distance Wind Dispersal
    Type
    thesis
    Abstract
    This study was designed to investigate a possible biogeographical origin and mechanism of dispersal ofthe Hawaiian fern Diplopterygium pinnatum. Molecular phylogenetic analyses were conducted on trnL-F and rbcL, cpDNA regions, for seven species of the genus Diplopterygium and three outgroups. Maximum parsimony and maximum likelihood analyses were used for phylogenetic reconstruction. Three hypotheses were tested: that the ancestor ofD. pinnatum originated from 1) an IndoPacific source and traveled to Hawaii via the jet stream, 2) an American source and traveled to Hawaii via the trade winds, or 3) an Austral source and traveled to Hawaii by a combination of an intertropical convergence zone (ITCZ) shift, Hadley cell air movement, and the trade winds. The two methods ofreconstruction, maximum parsimony and maximum likelihood, produced similar trees with similar support. The second hypothesis was rejected and the first and third hypotheses cannot be distinguished.
    Degree Awarded
    Bachelor's
    Semester
    Spring
    Department
    Life & Environmental Sciences
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    • Life and Environmental Sciences Undergraduate Theses

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