Biogeographical Origins of Hawaiian Diplopterygium pinnatum by Long Distance Wind Dispersal

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Authors
Christensen, Kris
Advisor
Jennifer Glowienka
John Addis
Kay Satre
Editor
Date of Issue
2006-04-01
Subject Keywords
Hawaiian fern, Diplopterygium pinnatum
Publisher
Citation
Series/Report No.
item.page.identifier
Title
Biogeographical Origins of Hawaiian Diplopterygium pinnatum by Long Distance Wind Dispersal
Other Titles
Type
thesis
Description
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.
Sponsors
Degree Awarded
Bachelor's
Semester
Spring
Department
Life & Environmental Sciences