Priority sampling locations in the eastern U.S. for the Integrated Monarch Monitoring Program

Description

The sampling locations provided here were selected as a two-stage Generalized Random Tessellation Stratified (GRTS) sample (Stevens & Olsen 2004). The first stage of the GRTS draw used a master sample developed by the North American Bat Monitoring Program (Loeb et al. 2015) from a 10 x 10 km grid placed over the conterminous U.S., Canada, and Mexico. Each 10 x 10 km grid cell (hereafter, master cell) was assigned a GRTS rank by NABat. The rank represents the priority order in which master cells should ideally be sampled. For the second stage of the draw, sampling points within a master cell were selected. Each point was defined as a 30 x 30 m cell of the GIS raster that defined monarch-relevant habitat. Sampling points within each master cell were assigned to 5 land-use sectors of interest. For the western U.S., 3 categories of estimated milkweed habitat suitability were used instead of land-use sectors.

Resources

Name Format Description Link
55 Landing page for access to the data https://doi.org/10.5066/P9EMA1YI
55 The metadata original format https://data.usgs.gov/datacatalog/metadata/USGS.5b61f872e4b006a11f6f787f.xml

Tags

  • sampling-design
  • canada
  • biota
  • mexico
  • monarch-butterfly
  • united-states
  • long-term-monitoring
  • status-and-trends
  • usgs-5b61f872e4b006a11f6f787f

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