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Abstract Detail


Biogeography

Riley, Lynn [1], Helenurm, Kaius [2], McGlaughlin, Mitchell E [3].

Phylogeography of Eriogonum endemic to California’s Channel Islands.

The California Channel Islands harbor many endemic animals and plants, including several endemic species and subspecies within the genus Eriogonum (Polygonaceae). Although a few Channel Island phylogeographic studies have been published, patterns of colonization and divergence have not been inferred for any Channel Island plant taxon. The current study uses cp DNA sequence divergence to infer colonization and gene flow patterns within Channel Island endemic Eriogonum. Data are presented from the monotypic endemic species Eriogonum arborescens , the three subspecies of the endemic species E. giganteum, and the three endemic subspecies of E. grande. Sampling was comprised of individual collections (N=8 to 32) from twenty-four populations of Eriogonum grande, eleven populations of E. giganteum, and two populations of E. arborescens distributed throughout the archipelago. One to three individuals from each population were sequenced at three chloroplast regions (ca. 2K total aligned basepairs). Distinct patterns of haplotype diversity and divergence were detected between different taxa, and within taxa on different islands. Implications for colonization patterns and inter-island gene flow are discussed.


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1 - University of South Dakota, Biology Department, 414 E. Clark Street, Vermillion, SD, 57069, United States
2 - University of South Dakota, Department of Biology, 414 E. Clark St, Vermillion, SD, 57069, USA
3 - University of Northern Colorado, School of Biology, 501 20th Street, Greeley, CO, 80639, United States

Keywords:
Eriogonum
cpDNA
island biogeography
Channel Islands.

Presentation Type: Oral Paper:Papers for Topics
Session: 21
Location: Cottonwood B/Snowbird Center
Date: Monday, July 27th, 2009
Time: 3:45 PM
Number: 21011
Abstract ID:747


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