Collin W. Ahrens

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PREMISE OF THE STUDY Expanded area cultivated with the bioenergy crop Panicum virgatum (switchgrass) could alter the genetics of native populations through gene flow, so understanding current and future species distribution is a first step toward estimating ecological impacts. We surveyed switchgrass distribution in the northeastern United States and(More)
Ecological risk assessments for grass species with novel traits are advisable, or required, in order to identify potential environmental harms prior to large-scale cultivation. Credible risk assessments are built upon knowledge of the communities that could be negatively affected by crop-to-wild gene flow, new weeds, or invasive plants. This study focused(More)
UNLABELLED PREMISE OF THE STUDY Development of microsatellite markers for the vulnerable forb Senecio macrocarpus was performed to begin an assessment of its population structure and breeding method to aid in the conservation of the species in Victoria, Australia. • METHODS AND RESULTS Fifteen microsatellite markers were developed for S. macrocarpus(More)
We isolated 12 new polymorphic microsatellite markers from Comesperma polygaloides, a rare and vulnerable subshrub from southeastern Australia. 454 pyrosequencing was used to identify 81,804 possible primer pairs. Of 96 pairs, 32 amplified a product of expected size in the target species. Subsequently, 12 loci were screened in five populations of C.(More)
Continued alterations to the Australian environment compromise the long-term viability of many plant species. We investigate the population genetics of Ptilotus macrocephalus, a perennial herb that occurs in 2 nationally endangered communities on the Victorian Volcanic Plain Bioregion (VVP), Australia, to answer key questions regarding regional(More)