NSF Graduate Research Fellow (NSF-GRF) via the Graduate Research Intern 
Program (GRIP)
Insect Invasion Biology
 
Our fifteen-member USGS Powell Center working group of Federal and 
academic research ecologists and entomologists is studying the 
theoretical and applied aspects of insect invasion.  The working group’s 
goals are to: 1) develop a quantitative model that informs prediction of 
insect invasions that could be high-impact; and 2) refine our working 
hypothesis so that the relative contributions of the defense-free space 
hypothesis and the enemy release hypothesis are more fully developed and 
the role of evolutionary history more fully specified. 
 
We have developed the structure of a Traits and Factors Database 
(TraFac) for herbivory-specialist insects, and have provided its initial 
population with traits of conifer specialist invading insects.  TraFac 
will be populated with traits of other invading insects specializing on 
other plant groups and of target herbivory specialist insects not yet 
established in North America but with a high likelihood of introduction.  
We will create a statistical model of species impact as predicted by the 
traits and factors coded in TraFac, and will extend our model to 
targeted herbivory-specialist insects that have not yet invaded. 
 
Our working group has an opening for a fully-funded 12 month NSF 
Graduate Research Fellow (NSF-GRF) via the Graduate Research Intern 
Program (GRIP) that will have a lead role in further development of the 
TraFac database, developing and testing statistical models predicting 
insect invasion and host plant defense, and publishing results.  The 
Intern will work in Tucson under the direct mentorship of a USGS 
research ecologist (Dr. Kathryn Thomas) who is one of the Principal 
Investigators, and will have access to USGS computing and modeling 
resources both in Tucson and with the Powell Center in Fort Collins.  
Work will be primarily office-based at USGS offices located on the 
University of Arizona campus.
 
The ideal candidate will have a strong background in entomology, 
management of biological databases, statistical modeling using R.  The 
Intern will be a fully functioning member of the Powell working group 
and will gain experience in the development, management, and 
documentation of a complex biological database; development and 
application of quantitative models predicting the impact of insect 
herbivory; and interaction with a dynamic team of researchers across the 
nation in tackling the theoretical and practical aspects of insect 
invasion.  In addition, the Intern will have exposure to the USGS and 
governmental research environment as well as working collaboratively 
across multiple agency and university venues.  This research issue is of 
national importance and is expected to provide a number of opportunities 
for continuing collaboration.  The USGS Powell Center supported our 
working group with comment on the importance of the problem and 
potential impact that success would have on ecosystems, conservation 
science and applied conservation implementation.
 
Please contact Dr. Kathryn Thomas (kathryn_a_tho...@usgs.gov) directly 
about more details about this position.

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