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Samuel Greaves

eDNA Laboratory Technician

Address: 
800 East Beckwith Avenue
Missoula, MT 59801-5801
Contact Samuel Greaves

Education

  • Carleton College, Bachelor Of Arts, Biology, 2016
  • Publications

    Franklin, Thomas; Wilcox, Taylor M.; McKelvey, Kevin S.; Greaves, Samuel; Dysthe, Joseph; Young, Michael K.; Schwartz, Michael K., 2019. Repurposing environmental DNA samples to verify the distribution of Rocky Mountain tailed frogs in the Warm Springs Creek Basin, Montana
    Franklin, Thomas; McKelvey, Kevin S.; Golding, Jessie; Mason, Daniel H.; Dysthe, Joseph; Pilgrim, Kristine L.; Squires, John R.; Aubry, Keith B.; Long, Robert A.; Greaves, Samuel; Raley, Catherine M.; Jackson, Scott; MacKay, Paula; Lisbon, Joshua; Sauder, Joel D.; Pruss, Michael T.; Heffington, Don; Schwartz, Michael K., 2019. Using environmental DNA methods to improve winter surveys for rare carnivores: DNA from snow and improved noninvasive techniques
    A suspected lynx has triggered this photo from a game camera in Montana (photo credit: Don Heffington).
    A new project showed that animal footprints in snow contain enough DNA for species identification, even when the snow was many months old. The study extracted DNA from snow samples collected within animal tracks as well as areas where the animal had been photographed months earlier. Newly developed genetic assays were applied and positively detected the DNA of each species, performing nearly flawlessly on samples previously considered too poor to provide usable DNA. This method could revolutionize winter surveys of rare species by greatly reducing or eliminating misidentifications and missed detections.
    The website provides: 1) A large list of supporting science behind eDNA sampling. 2) The recommended field protocol for eDNA sampling and the equipment loan program administered by the NGC. 3) A systematically-spaced sampling grid for all flowing waters of the U.S. in a downloadable format that includes unique database identifiers and geographic coordinates for all sampling sites. Available for download in an Geodatabase or available by ArcGIS Online map. This sampling grid can be used to determine your field collection sites to contribute. 4) The lab results of eDNA sampling at those sites where project partners have agreed to share data.

    RMRS Science Program Areas: 
    Wildlife and Terrestrial Ecosystems