Sierra Nevada Carnivore Monitoring Program
Background
The Region 5 Sierra Nevada Carnivore Monitoring Program is a long-term broad-scale population monitoring program to detect potential population declines in fisher (Pekania pennanti) and Pacific marten (Martes caurina) throughout National Forest lands in the Sierra Nevada, with a primary focus on the federally endangered southern Sierra Nevada fisher population.
This program systematically surveys monitoring units using remote sensor cameras, track-plate stations and genetic sampling to detect species and identify individuals. While originally designed to detect changes in occupancy, advances in survey methodology and analytical techniques have expanded the scope of the program to also include monitoring for changes in genetic diversity, population connectivity, species interactions and dietary composition over time. Monitoring occurs over time at fixed locations and therefore changes in species presence can be correlated with changes in environmental conditions over time, such as wildfire, drought, and tree mortality.
Accomplishments and Future Directions
Selected Publications
Tucker, J.M., King, C., Lekivetz, R., Murdoch, R., Jewell, Z.C. and Alibhai, S.K., 2024. Development of a non-invasive method for species and sex identification of rare forest carnivores using footprint identification technology. Ecological Informatics, 79, p.102431.
Rich, L.N., Medel, I.D., Bangen, S., Wengert, G.M., Toenies, M., Tucker, J.M., Gabriel, M.W. and Davis, C.L., 2023. Integrating existing data to assess the risk of an expanding land use change on mammals. Landscape Ecology, pp.1-16.
Smith, G.B., Tucker, J.M. and Pauli, J.N., 2022. Habitat and drought influence the diet of an unexpected mycophagist: fishers in the Sierra Nevada, California. Journal of Mammalogy, 103(2), pp.328-338.
Pauli, J.N., Manlick, P.J., Tucker, J.M., Smith, G.B., Jensen, P.G. and Fisher, J.T., 2022. Competitive overlap between martens Martes americana and Martes caurina and fishers Pekania pennanti: a rangewide perspective and synthesis. Mammal Review, 52(3), pp.392-409.
Tucker, J.M., Moriarty, K.M., Ellis, M.M. and Golding, J.D., 2021. Effective sampling area is a major driver of power to detect long term trends in multispecies occupancy monitoring. Ecosphere, 12(5), p.e03519.
Davis, C.L., Rich, L.N., Farris, Z.J., Kelly, M.J., Di Bitetti, M.S., Blanco, Y.D., Albanesi, S., Farhadinia, M.S., Gholikhani, N., Hamel, S. Harmsen, B.J., J.M. Tucker et al., 2018. Ecological correlates of the spatial co‐occurrence of sympatric mammalian carnivores worldwide. Ecology letters.
Tucker, Jody M.; Allendorf, Fred W.; Truex, Richard L.; Schwartz, Michael K. 2017. Sex-biased dispersal and spatial heterogeneity affect landscape resistance to gene flow in fisher. Ecosphere. 8(6): e01839.
Rich, L.N., Davis, C.L., Farris, Z.J., Miller, D.A., Tucker, J.M., Hamel, S., Farhadinia, M.S., Steenweg, R., Di Bitetti, M.S., Thapa, K. and Kane, M.D., 2017. Assessing global patterns in mammalian carnivore occupancy and richness by integrating local camera trap surveys. Global Ecology and Biogeography. Global Ecology and Biogeography, 26(8), pp.918-929.
Zielinski, William J.; Tucker, Jody M.; Rennie, Kerry M. 2017. Niche overlap of competing carnivores across climatic gradients and the conservation implications of climate change at geographic range margins. Biological Conservation. 209: 533-545. https://doi.org/10.1016/j.biocon.2017.03.016.
Ellis, Martha M.; Ivan, Jacob S.; Tucker, Jody M.; Schwartz, Michael K. 2015. rSPACE: Spatially based power analysis for conservation and ecology. Methods in Ecology and Evolution. Methods in Ecology and Evolution. doi: 10.1111/2041-210X.12369.
Tucker, Jody M.; Schwartz, Michael K.; Truex, Richard L.; Wisely, Samantha M.; Allendorf, Fred W. 2014. Sampling affects the detection of genetic subdivision and conservation implications for fisher in the Sierra Nevada. Conservation Genetics. 15(1): 123-136.
Zielinski, William J.; Baldwin, James A.; Truex, Richard L.; Tucker, Jody M.; Flebbe, Patricia A. 2013. Estimating trend in occupancy for the Southern Sierra fisher Martes pennanti population. Journal of Fish and Wildlife Management 4(1); e1944-687X. doi: 10.3996/012012-JFWM-002
Tucker, Jody M.; Schwartz, Michael K.; Truex, Richard L.; Pilgrim, Kristine L.; Allendorf, Fred W. 2012. Historical and contemporary DNA indicate fisher decline and isolation occurred prior to the European settlement of California. PLoS ONE. 7(12): e52803.
Spencer, Wayne; Rustigian-Romsos, Heather; Strittholt, James; Scheller, Robert; Zielinski, William; Truex, Richard. 2011. Using occupancy and population models to assess habitat conservation opportunities for an isolated carnivore population. Biological Conservation 144(2): 788-803
For more Forest Service publications, visit Treesearch.
Contact Information
Stephanie Eyes
Regional Carnivore Monitoring Program Leader
Forest Service, Pacific Southwest Region
stephanie.eyes@usda.gov