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Dr. Gerald Allen, Dr. Thomas Whitham, Andrew Krohn


Three key hypotheses will be examined: First, landscape genetic connectivity in Fremont cottonwood determines community similarity and connectivity. We will characterize the arthropod and fungal communities of Fremont cottonwood and test whether genetic connectivity in Fremont influences the structure and composition of its dependent communities. Second, genotype x environmental interactions define arthropod and fungal communities associated with Fremont cottonwood. Using a combination of experimental gardens that all contain the same cottonwood source populations and individual genotypes from the species’ range, we will quantify tree genotype x environment interactions on dependent communities. Third, climate change and exotic species invasion will negatively impact Fremont cottonwood connectivity and its associated communities. Using the community data derived from hypotheses 1 & 2, we will develop genetics-based models to better inform conservation management of foundation species, their communities and associated ecosystem processes.


Fremont Cottonwood, Genomics, SEGA, climate change, community genetics

Contributing Institution

Northern Arizona University

Usage Rights

Creative Commons CC-BY-NC-SA