Purdue University Graduate School
Cook_Final_Thesis_04282021.pdf (3.93 MB)
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posted on 2021-04-28, 15:54 authored by Rachel T CookRachel T Cook
In chapter 1, I used spotted lanternfly (Lycorma delicatula) visual survey data provided by USDA Animal and Plant Health Inspection Service (APHIS), along with two anthropogenic variables and six habitat variables. The anthropogenic variables were human population from the U.S. Census and road density calculated by Liebhold et al. 2013 from the ArcGIS World Transportation reference layer and each was considered a proxy for human-aided dispersal. The six habitat variables included forested area and five host availability terms expressed as basal area, host trees per acre, number of host trees per county, tree of heaven occurrence, and canopy cover. Forested land was obtained from the US Forest Service FIA MapMaker online data query system (https://www.nrs.fs.fed.us/fia/data-tools/mapping-tools). Percent forest canopy cover was obtained from the Forest Service’s cartographic tree canopy cover product (USDA Forest Service 2016). Host basal area and numbers of host trees per acre and county were obtained from the Forest Service’s Forest Inventory and Analysis (FIA) program, using a published list of known SLF hosts from Barringer and Ciafre (2020).

In chapter 2, I used US Forest Service (USFS) Insect and Disease Detection Surveys (IDS) to obtain gypsy moth defoliation information. I queried the US Geological Survey National Water Information System (USGS NWIS) for public stream gage data. I also used monthly precipitation data from PRISM Climate Group at Oregon State University and monthly evapotranspiration data from USGS Center for Integrated Data Analytics.


MSB-FRA Modeling Invasion Dynamics Across Scales (MIDAS)

Directorate for Biological Sciences

Find out more...


Degree Type

  • Master of Science


  • Forestry and Natural Resources

Campus location

  • West Lafayette

Advisor/Supervisor/Committee Chair

Songlin Fei

Additional Committee Member 2

Jacob Hosen

Additional Committee Member 3

Andrew Liebhold