Unique utilisation pattern responses of five sympatric ungulates to local phenological gradients
Hila Shamon
A * , Andy J. Boyce A , Kyran Kunkle B and William J. McShea A
+ Author Affiliations
- Author Affiliations
A Smithsonian Conservation Biology Institute, National Zoological Park, 1500 Remount Road, Front Royal, VA 22630, USA.
B American Prairie, 2048 Analysis Drive, Bozeman, MT 59718, USA.
Wildlife Research 49(7) 610-623 https://doi.org/10.1071/WR20185
Submitted: 30 October 2020 Accepted: 3 February 2022 Published: 31 March 2022
© 2022 The Author(s) (or their employer(s)). Published by CSIRO Publishing.
Abstract
Context: Ungulate life-history strategies and behaviour are driven by two dominant factors, namely, acquisition of nutrients and avoidance of predation. Although many studies have investigated single species resource/habitat selection, there are still gaps in our understanding of multi-species systems and resource partitioning.
Aim: We explored the habitat selection of five sympatric resident ungulates in relation to seasonal phenological gradients in a temperate grassland (Northern Great Plains) system. We identified and compared habitat-utilisation strategies across the vegetation-growing season and related to established forage acquisition hypotheses.
Methods: We collected ungulate detection data during two field seasons (July–October 2018, May–September 2019) across 202 sites and deployed 1202 cameras (29 284 camera-nights). We modelled ungulate detections in relation to normalised difference vegetation index (NDVI) and NDVI slope (rate and direction of change) to learn about ungulate resource selection in four habitat types (grass, prairie dog colonies, forest and riparian).
Results: We found unique foraging strategies for each of the focal species throughout the growing season (spring, summer, early autumn), which resulted in seasonal partitioning of resources among sympatric ungulate species.
Conclusions: The temporal and spatial patterns observed emphasise that multiple species can experience the same vegetation phenology and respond differently in their movements and foraging behaviour. At local scales, some ungulates selected for higher forage quantity (selection of higher NDVI) and some for higher forage quality (selection of positive NDVI slope or greening up).
Implications: The unique foraging strategies presented here indicated that generalisations are problematic when managing wildlife resources and emphasise the need to conduct multi-species studies to understand resource utilisation at local scales. Furthermore, understanding variation in foraging strategies of resident sympatric species can direct management planning where decreased connectivity or loss of migration pathways alters traditional behaviours.
Keywords: habitat selection, elk, mule deer, NDVI, Northern Great Plains, plains bison, pronghorn, white-tailed deer.
References
Archer, S, Garrett, MG, and Detling, JK (1987). Rates of vegetation change associated with prairie dog (Cynomys ludovicianus) grazing in North American mixed-grass prairie. Vegetatio 72, 159–166.| Rates of vegetation change associated with prairie dog (Cynomys ludovicianus) grazing in North American mixed-grass prairie.Crossref | GoogleScholarGoogle Scholar |
Arsenault, R, and Owen-Smith, N (2008). Resource partitioning by grass height among grazing ungulates does not follow body size relation. Oikos 117, 1711–1717.
| Resource partitioning by grass height among grazing ungulates does not follow body size relation.Crossref | GoogleScholarGoogle Scholar |
Bergmann, GT, Craine, JM, Robeson, MS, and Fierer, N (2015). Seasonal shifts in diet and gut microbiota of the American bison (Bison bison). PLoS One 10, 1–14.
| Seasonal shifts in diet and gut microbiota of the American bison (Bison bison).Crossref | GoogleScholarGoogle Scholar |
Bischof, R, Loe, LE, Meisingset, EL, Zimmermann, B, Van Moorter, B, and Mysterud, A (2012). A migratory northern ungulate in the pursuit of spring: jumping or surfing the green wave? The American Naturalist 180, 407–424.
| A migratory northern ungulate in the pursuit of spring: jumping or surfing the green wave?Crossref | GoogleScholarGoogle Scholar | 22976006PubMed |
Boone, RB, Thirgood, SJ, Hopcraft, JGC, Boone, B, Thirgood, J, Grant, J, and Hopcraft, C (2010). Serengeti wildebeest migratory patterns modeled from rainfall and new vegetation growth. Ecology 87, 1987–1994.
| Serengeti wildebeest migratory patterns modeled from rainfall and new vegetation growth.Crossref | GoogleScholarGoogle Scholar |
Borowik, T, Pettorelli, N, Sönnichsen, L, and Jędrzejewska, B (2013). Normalized difference vegetation index (NDVI) as a predictor of forage availability for ungulates in forest and field habitats. European Journal of Wildlife Research 59, 675–682.
| Normalized difference vegetation index (NDVI) as a predictor of forage availability for ungulates in forest and field habitats.Crossref | GoogleScholarGoogle Scholar |
Chaikina, NA, and Ruckstuhl, KE (2006). The effect of cattle grazing on native ungulates: the good, the bad, and the ugly. Rangelands 13, 5188–5192.
| The effect of cattle grazing on native ungulates: the good, the bad, and the ugly.Crossref | GoogleScholarGoogle Scholar |
Charboneau JLM (2013) A floristic inventory of Phillips and Valley counties, Montana, USA. MSc thesis, The University of Wyoming, WY, USA.
Codron, D, and Clauss, M (2010). Rumen physiology constrains diet niche: linking digestive physiology and food selection across wild ruminant species. Canadian Journal of Zoology 88, 1129–1138.
| Rumen physiology constrains diet niche: linking digestive physiology and food selection across wild ruminant species.Crossref | GoogleScholarGoogle Scholar |
Codron, D, Brink, JS, Rossouw, L, Clauss, M, Codron, J, Lee-Thorp, JA, and Sponheimer, M (2008). Functional differentiation of African grazing ruminants: an example of specialized adaptations to very small changes in diet. Biological Journal of the Linnean Society 94, 755–764.
| Functional differentiation of African grazing ruminants: an example of specialized adaptations to very small changes in diet.Crossref | GoogleScholarGoogle Scholar |
Coe PK, Johnson BK, Stewart KM, Kie JG (2004) Spatial and temporal interactions of elk, mule deer, and cattle. In Transactions of the 69th North American Wildlife and Natural Resources Conference. pp. 656–669. Available at http://treesearch.fs.fed.us/pubs/24694
Courtemanch, AB, Kauffman, MJ, Kilpatrick, S, and Dewey, SR (2017). Alternative foraging strategies enable a mountain ungulate to persist after migration loss. Ecosphere 8, e01855.
| Alternative foraging strategies enable a mountain ungulate to persist after migration loss.Crossref | GoogleScholarGoogle Scholar |
Creech, TG, Epps, CW, Monello, RJ, and Wehausen, JD (2016). Predicting diet quality and genetic diversity of a desert-adapted ungulate with NDVI. Journal of Arid Environments 127, 160–170.
| Predicting diet quality and genetic diversity of a desert-adapted ungulate with NDVI.Crossref | GoogleScholarGoogle Scholar |
Debeffe, L, Maren Rivrud, I, Brekkum, Ø, Meisingset, EL, and Mysterud, A (2017). Implications of the forage maturation hypothesis for activity of partially migratory male and female deer. Ecosphere 8, e02050.
| Implications of the forage maturation hypothesis for activity of partially migratory male and female deer.Crossref | GoogleScholarGoogle Scholar |
Eggeman, SL, Hebblewhite, M, Bohm, H, Whittington, J, and Merrill, EH (2016). Behavioural flexibility in migratory behaviour in a long-lived large herbivore. Journal of Animal Ecology 85, 785–797.
| Behavioural flexibility in migratory behaviour in a long-lived large herbivore.Crossref | GoogleScholarGoogle Scholar |
Fahnestock, JT, and Detling, JK (2002). Bison-prairie dog-plant interactions in a North American mixed-grass prairie. Oecologia 132, 86–95.
| Bison-prairie dog-plant interactions in a North American mixed-grass prairie.Crossref | GoogleScholarGoogle Scholar | 28547282PubMed |
Frisina, MR (1992). Elk habitat use within a rest-rotation grazing system. Ranglenads 14, 93–96.
Fryxell, JM, Greever, J, and Sinclair, ARE (1988). Why are migratory ungulates so abundant? American Naturalist 131, 781–798.
| Why are migratory ungulates so abundant?Crossref | GoogleScholarGoogle Scholar |
George MR, Rice K (2016) Plant growth and development. In ‘Ecology and Management of Annual Rangelands’. (Ed. MR George) pp. 73–95. (Department of Plant Science: Davis, CA, USA)
Geremia, C, Merkle, JA, Eacker, DR, Wallen, RL, White, PJ, Hebblewhite, M, and Kauffman, MJ (2019). Migrating bison engineer the green wave. Proceedings of the National Academy of Sciences of the United States of America 116, 25707–25713.
| Migrating bison engineer the green wave.Crossref | GoogleScholarGoogle Scholar | 31754040PubMed |
Guan, TP, Ge, BM, McShea, WJ, Li, S, Song, YL, and Stewart, CM (2013). Seasonal migration by a large forest ungulate: a study on takin (Budorcas taxicolor) in Sichuan Province, China. European Journal of Wildlife Research 59, 81–91.
| Seasonal migration by a large forest ungulate: a study on takin (Budorcas taxicolor) in Sichuan Province, China.Crossref | GoogleScholarGoogle Scholar |
Hamel, S, Garel, M, Festa-Bianchet, M, Gaillard, J-M, and Côté, SD (2009). Spring normalized difference vegetation index (NDVI) predicts annual variation in timing of peak faecal crude protein in mountain ungulates. Journal of Applied Ecology 46, 582–589.
| Spring normalized difference vegetation index (NDVI) predicts annual variation in timing of peak faecal crude protein in mountain ungulates.Crossref | GoogleScholarGoogle Scholar |
Hebblewhite, M, and Merrill, EH (2009). Trade-offs between predation risk and forage differ between migrant strategies in a migratory ungulate. Ecology 90, 3445–3454.
| Trade-offs between predation risk and forage differ between migrant strategies in a migratory ungulate.Crossref | GoogleScholarGoogle Scholar | 20120812PubMed |
Hebblewhite, M, Merrill, E, and McDermid, G (2008). A multi-scale test of the forage maturation hypothesis in a partially migratory ungulate population. Ecological Monographs 78, 141–166.
| A multi-scale test of the forage maturation hypothesis in a partially migratory ungulate population.Crossref | GoogleScholarGoogle Scholar |
Hofmann, ARR (1989). Evolutionary steps of ecophysiological adaptation and diversification of ruminants: a comparative view of their digestive system. Oecologia 78, 443–457.
| Evolutionary steps of ecophysiological adaptation and diversification of ruminants: a comparative view of their digestive system.Crossref | GoogleScholarGoogle Scholar |
Hogrefe, KR, Patil, VP, Ruthrauff, DR, Meixell, BW, Budde, ME, Hupp, JW, and Ward, DH (2017). Normalized difference vegetation index as an estimator for abundance and quality of avian herbivore forage in Arctic Alaska. Remote Sensing 9, 1–21.
| Normalized difference vegetation index as an estimator for abundance and quality of avian herbivore forage in Arctic Alaska.Crossref | GoogleScholarGoogle Scholar |
Hopcraft, JGC, Olff, H, and Sinclair, ARE (2010). Herbivores, resources and risks: alternating regulation along primary environmental gradients in savannas. Trends in Ecology & Evolution 25, 119–128.
| Herbivores, resources and risks: alternating regulation along primary environmental gradients in savannas.Crossref | GoogleScholarGoogle Scholar |
Illius, AW (1997). Physiological adaptation in savanna ungulates. Proceedings of the Nutrition Society 56, 1041–1048.
| Physiological adaptation in savanna ungulates.Crossref | GoogleScholarGoogle Scholar |
Innes R (2013) Odocoileus virginianus. In ‘Fire Effects Information System’. (U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer)) Available at www.fs.fed.us/database/feis/animals/mammal/odvi/all.html [Accessed 8 May 2020]
Jakes A (2015) Factors influencing seasonal migrations of pronghorn across the Northern Sagebrush Steppe. Thesis, University of Calgary, Canada.
Jarman, PJ (1974). The social organisation of antelope in relation to their ecology. Behaviour 48, 215–267.
Jenks, J, Jacques, C, Sievers, J, Klaver, R, Bowyer, R, and Roddy, D (2006). Evaluating genetic viability of pronghorn in Wind Cave National Park. The Prairie Naturalist 38, 155–165.
Johnson-nistler, A, Carolyn, M, Bok, F, Carl, L, Johnson-nistler, CM, Sowell, BF, Sherwood, HW, and Wambolt, CL (2020). Black-tailed prairie dog effects on Montana’s mixed-grass prairie. Rangeland Ecology and Management 57, 641–648.
| Black-tailed prairie dog effects on Montana’s mixed-grass prairie.Crossref | GoogleScholarGoogle Scholar |
Jones, JD, Kauffman, MJ, Monteith, KL, Scurlock, BM, Albeke, SE, and Cross, PC (2014). Supplemental feeding alters migration of a temperate ungulate. Ecological Applications 24, 1769–1779.
| Supplemental feeding alters migration of a temperate ungulate.Crossref | GoogleScholarGoogle Scholar | 29210236PubMed |
Joseph, LN, Elkin, C, Martin, TG, and Possingham, HP (2009). Modeling abundance using N-mixture models: the importance of considering ecological mechanisms. Ecological Applications 19, 631–642.
| Modeling abundance using N-mixture models: the importance of considering ecological mechanisms.Crossref | GoogleScholarGoogle Scholar | 19425427PubMed |
Knechtel, MM, and Patterson, SH (1962). Bentonite deposits of the northern Black Hills district, Wyoming, Montana, and South Dakota. US Geological Survey Bulletin 1082–M, 893–1030.
Lendrum, PE, Anderson, CR, Monteith, KL, Jenks, JA, and Bowyer, RT (2014). Relating the movement of a rapidly migrating ungulate to spatiotemporal patterns of forage quality. Mammalian Biology 79, 369–375.
| Relating the movement of a rapidly migrating ungulate to spatiotemporal patterns of forage quality.Crossref | GoogleScholarGoogle Scholar |
Leuthold W (2012) ‘African ungulates: a comparative review of their ethology and behavioral ecology.’ (Springer Science & Business Media)
Macandza, VA, Owen-Smith, N, and Cain, IW (2012). Habitat and resource partitioning between abundant and relatively rare grazing ungulates. Journal of Zoology 287, 175–185.
| Habitat and resource partitioning between abundant and relatively rare grazing ungulates.Crossref | GoogleScholarGoogle Scholar |
Mackie, RJ (1970). Range ecology and relations of mule deer, elk, and cattle in the Missouri River Breaks, Montana. Wildlife Monographs 46, 3–79.
| Range ecology and relations of mule deer, elk, and cattle in the Missouri River Breaks, Montana.Crossref | GoogleScholarGoogle Scholar |
Maor Cohen, M, Shamon, H, Dolev, A, Reichman, A, David, SB, and Saltz, D (2020). Long-term reevaluation of spatially explicit models as a means for adaptive wildlife management. Ecological Applications 30, e02088.
| Long-term reevaluation of spatially explicit models as a means for adaptive wildlife management.Crossref | GoogleScholarGoogle Scholar | 32017327PubMed |
Merkle, JA, Monteith, KL, Aikens, EO, Hayes, MM, Hersey, KR, Middleton, AD, Oates, BA, Sawyer, H, Scurlock, BM, and Kauffman, MJ (2016). Large herbivores surf waves of green-up during spring. Proceedings of the Royal Society B: Biological Sciences 283, 20160456.
| Large herbivores surf waves of green-up during spring.Crossref | GoogleScholarGoogle Scholar | 27335416PubMed |
Middleton, AD, Merkle, JA, McWhirter, DE, Cook, JG, Cook, RC, White, PJ, and Kauffman, MJ (2018). Green-wave surfing increases fat gain in a migratory ungulate. Oikos 127, 1060–1068.
| Green-wave surfing increases fat gain in a migratory ungulate.Crossref | GoogleScholarGoogle Scholar |
Morrison, TA, and Bolger, DT (2014). Connectivity and bottlenecks in a migratory wildebeest Connochaetes taurinus population. Oryx 48, 613–621.
| Connectivity and bottlenecks in a migratory wildebeest Connochaetes taurinus population.Crossref | GoogleScholarGoogle Scholar |
Murray, MG, and Illius, AW (2000). Vegetation modification and resource competition in grazing ungulates. Oikos 89, 501–508.
| Vegetation modification and resource competition in grazing ungulates.Crossref | GoogleScholarGoogle Scholar |
Naples, VL (2000). Evolution of tertiary mammals of North America. Vol. 1: terrestrial carnivores, ungulates, and ungulatelike mammals Journal of Mammalogy 81, 914–916.
| Evolution of tertiary mammals of North America. Vol. 1: terrestrial carnivores, ungulates, and ungulatelike mammalsCrossref | GoogleScholarGoogle Scholar |
Olson, AKC, and Cochran, RC (2003). Vegetation indices, CO2 flux, and biomass for Northern Plains Grasslands. Journal of Range Management 56, 382–387.
Parker, KL, Barboza, PS, and Gillingham, MP (2009). Nutrition integrates environmental responses of ungulates. Functional Ecology 23, 57–69.
| Nutrition integrates environmental responses of ungulates.Crossref | GoogleScholarGoogle Scholar |
Pettorelli, N, Pelletier, F, von Hardenberg, A, Festa-Bianchet, M, and Côté, SD (2007). Early onset of vegetation growth vs. rapid green-up: impacts on juvenile mountain ungulates. Ecology 88, 381–390.
| Early onset of vegetation growth vs. rapid green-up: impacts on juvenile mountain ungulates.Crossref | GoogleScholarGoogle Scholar | 17479756PubMed |
Prins H (1996) ‘Ecology and behaviour of the African buffalo: social inequality and decision making.’ (Springer Science & Business Media)
Proffitt, KM, Gude, JA, Hamlin, KL, and Messer, MA (2013). Effects of hunter access and habitat security on elk habitat selection in landscapes with a public and private land matrix. The Journal of Wildlife Management 77, 514–524.
| Effects of hunter access and habitat security on elk habitat selection in landscapes with a public and private land matrix.Crossref | GoogleScholarGoogle Scholar |
Proffitt, KM, Hebblewhite, M, Peters, W, Hupp, N, and Shamhart, J (2016a). Linking landscape-scale differences in forage to ungulate nutritional ecology. Ecological Applications 26, 2156–2174.
| Linking landscape-scale differences in forage to ungulate nutritional ecology.Crossref | GoogleScholarGoogle Scholar | 27755722PubMed |
Proffitt, KM, Thompson, S, Henry, D, Jimenez, B, and Gude, JA (2016b). Hunter access affects elk resource selection in the Missouri breaks, Montana. The Journal of Wildlife Management 80, 1167–1176.
| Hunter access affects elk resource selection in the Missouri breaks, Montana.Crossref | GoogleScholarGoogle Scholar |
Raynor, EJ, Joern, A, and Briggs, JM (2015). Bison foraging responds to fire frequency in nutritionally heterogeneous grassland. Ecology 96, 1586–1597.
| Bison foraging responds to fire frequency in nutritionally heterogeneous grassland.Crossref | GoogleScholarGoogle Scholar |
Raynor, EJ, Joern, A, Nippert, JB, and Briggs, JM (2016). Foraging decisions underlying restricted space use: effects of fire and forage maturation on large herbivore nutrient uptake. Ecology and Evolution 6, 5843–5853.
| Foraging decisions underlying restricted space use: effects of fire and forage maturation on large herbivore nutrient uptake.Crossref | GoogleScholarGoogle Scholar | 27547359PubMed |
Robb, B, Huang, Q, Sexton, JO, Stoner, D, and Leimgruber, P (2019). Environmental Differences between Migratory and Resident Ungulates: predicting Movement Strategies in Rocky Mountain Mule Deer (Odocoileus hemionus). Remote Sensing 11, 1–15.
Robinson, BG, Hebblewhite, M, and Merrill, EH (2010). Are migrant and resident elk (Cervus elaphus) exposed to similar forage and predation risk on their sympatric winter range? Oecologia 164, 265–275.
| Are migrant and resident elk (Cervus elaphus) exposed to similar forage and predation risk on their sympatric winter range?Crossref | GoogleScholarGoogle Scholar | 20372929PubMed |
Royle, JA (2004). N-mixture models for estimating population size from spatially replicated counts. Biometrics 60, 108–15.
| N-mixture models for estimating population size from spatially replicated counts.Crossref | GoogleScholarGoogle Scholar | 15032780PubMed |
Sawyer, H, Kauffman, MJ, Nielson, RM, and Horne, JS (2009). Identifying and prioritizing ungulate migration routes for landscape-level conservation. Ecological Applications 19, 2016–2025.
| Identifying and prioritizing ungulate migration routes for landscape-level conservation.Crossref | GoogleScholarGoogle Scholar | 20014575PubMed |
Schwartz, CC, and Ellis, JE (1981). Feeding Ecology and Niche Separation in Some Native and Domestic Ungulates on the Shortgrass Prairie. The Journal of Applied Ecology 18, 343.
| Feeding Ecology and Niche Separation in Some Native and Domestic Ungulates on the Shortgrass Prairie.Crossref | GoogleScholarGoogle Scholar |
Schweiger, AK, Schütz, M, Anderwald, P, Schaepman, ME, Kneubühler, M, Haller, R, and Risch, AC (2015). Foraging ecology of three sympatric ungulate species - behavioural and resource maps indicate differences between chamois, ibex and red deer. Movement Ecology 3, 6.
| Foraging ecology of three sympatric ungulate species - behavioural and resource maps indicate differences between chamois, ibex and red deer.Crossref | GoogleScholarGoogle Scholar | 26807258PubMed |
Scurlock, BM, Monteith, KL, Hayes, MM, Aikens, EO, Merkle, JA, Oates, BA, Kauffman, MJ, Hersey, KR, Middleton, AD, and Sawyer, H (2016). Large herbivores surf waves of green-up during spring. Proceedings of the Royal Society B: Biological Sciences 283, 20160456.
| Large herbivores surf waves of green-up during spring.Crossref | GoogleScholarGoogle Scholar | 27335416PubMed |
Shamoon, H, Saltz, D, and Dayan, T (2017). Fine-scale temporal and spatial population fluctuations of medium sized carnivores in a Mediterranean agricultural matrix. Landscape Ecology 32, 1243–1256.
| Fine-scale temporal and spatial population fluctuations of medium sized carnivores in a Mediterranean agricultural matrix.Crossref | GoogleScholarGoogle Scholar |
Shamoon, H, Maor, R, Saltz, D, and Dayan, T (2018). Increased mammal nocturnality in agricultural landscapes results in fragmentation due to cascading effects. Biological Conservation 226, 32–41.
| Increased mammal nocturnality in agricultural landscapes results in fragmentation due to cascading effects.Crossref | GoogleScholarGoogle Scholar |
Shumway RH, Stoffer DS (2017) ‘Time series analysis and its applications: with R examples.’ (Springer)
Spitz, DB, Hebblewhite, M, Stephenson, TR, and German, DW (2018). How plastic is migratory behavior? Quantifying elevational movement in a partially migratory alpine ungulate, the sierra nevada bighorn sheep (Ovis canadensis sierrae). Canadian Journal of Zoology 96, 1385–1394.
| How plastic is migratory behavior? Quantifying elevational movement in a partially migratory alpine ungulate, the sierra nevada bighorn sheep (Ovis canadensis sierrae).Crossref | GoogleScholarGoogle Scholar |
Stewart, KM, Bowyer, RT, Kie, JG, Cimon, NJ, and Johnson, BK (2002). Temporospatial Distributions of Elk, Mule Deer, and Cattle: Resource Partitioning and Competitive Displacement. Journal of Mammalogy 83, 229–244.
| Temporospatial Distributions of Elk, Mule Deer, and Cattle: Resource Partitioning and Competitive Displacement.Crossref | GoogleScholarGoogle Scholar |
Stewart, KM, Bowyer, RT, Kie, JG, Dick, BL, and Ben-David, M (2003). Niche partitioning among mule deer, elk, and cattle: do stable isotopes reflect dietary niche? Ecoscience 10, 297–302.
| Niche partitioning among mule deer, elk, and cattle: do stable isotopes reflect dietary niche?Crossref | GoogleScholarGoogle Scholar |
Stewart, KM, Bowyer, RT, Kie, JG, and Hurley, MA (2010). Spatial Distributions of Mule Deer and North American Elk: Resource Partitioning in a Sage-Steppe Environment. The American Midland Naturalist 163, 400–412.
| Spatial Distributions of Mule Deer and North American Elk: Resource Partitioning in a Sage-Steppe Environment.Crossref | GoogleScholarGoogle Scholar |
Studer, S, Stöckli, R, Appenzeller, C, and Vidale, PL (2007). A comparative study of satellite and ground-based phenology. International Journal of Biometeorology 51, 405–414.
| A comparative study of satellite and ground-based phenology.Crossref | GoogleScholarGoogle Scholar | 17235537PubMed |
Todd, SW, Hoffer, RM, and Milchunas, DG (1998). Biomass estimation on grazed and ungrazed rangelands using spectral indices. International Journal of Remote Sensing 19, 427–438.
| Biomass estimation on grazed and ungrazed rangelands using spectral indices.Crossref | GoogleScholarGoogle Scholar |
Torstenson, WLF, Mosley, JC, Brewer, TK, Tess, MW, and Knight, JE (2006). Elk, Mule Deer, and Cattle Foraging Relationships on Foothill and Mountain Rangeland. Rangeland Ecology & Management 59, 80–87.
| Elk, Mule Deer, and Cattle Foraging Relationships on Foothill and Mountain Rangeland.Crossref | GoogleScholarGoogle Scholar |
van Beest, FM, McLoughlin, PD, Vander Wal, E, and Brook, RK (2014). Density-dependent habitat selection and partitioning between two sympatric ungulates. Oecologia 175, 1155–1165.
| Density-dependent habitat selection and partitioning between two sympatric ungulates.Crossref | GoogleScholarGoogle Scholar | 24913777PubMed |
Veldhuis, MP, Hofmeester, TR, Balme, G, Druce, DJ, Pitman, RT, and Cromsigt, JPGM (2020). Predation risk constrains herbivores’ adaptive capacity to warming. Nature Ecology & Evolution , .
| Predation risk constrains herbivores’ adaptive capacity to warming.Crossref | GoogleScholarGoogle Scholar |
Villamuelas, M, Fernández, N, Albanell, E, Gálvez-Cerón, A, Bartolomé, J, Mentaberre, G, López-Olvera, JR, Fernández-Aguilar, X, Colom-Cadena, A, López-Martín, JM, Pérez-Barbería, J, Garel, M, Marco, I, and Serrano, E (2016). The Enhanced Vegetation Index (EVI) as a proxy for diet quality and composition in a mountain ungulate. Ecological Indicators 61, 658–666.
| The Enhanced Vegetation Index (EVI) as a proxy for diet quality and composition in a mountain ungulate.Crossref | GoogleScholarGoogle Scholar |
Wang, J, Rich, PM, Price, KP, and Kettle, WD (2004). Relations between NDVI and tree productivity in the central Great Plains. International Journal of Remote Sensing 25, 3127–3138.
| Relations between NDVI and tree productivity in the central Great Plains.Crossref | GoogleScholarGoogle Scholar |
Watkins B, Bishop C, Bergman E, Hale B, Wakeling BF, Bronson A, Carpenter LH, Lutz DW (2007) Habitat guidelines for mule deer: Colorado plateau shrubland and forest ecoregion. Available at http://scholar.google.com/scholar?hl=en&btnG=Search&q=intitle:Habitat+guidelines+for+mule+deer:+Colorado+plateau+shrubland+and+forest+ecoregion#0
Whitlock C, Cross W, Maxwell B, Silverman N, Wade A (2017) 2017 Montana Climate Assessment. Available at https://scholarworks.montana.edu/xmlui/handle/1/13584
Whitney, LW, Anthony, RG, and Jackson, DH (2011). Resource partitioning between sympatric Columbian white-tailed and black-tailed deer in western Oregon. The Journal of Wildlife Management 75, 631–645.
| Resource partitioning between sympatric Columbian white-tailed and black-tailed deer in western Oregon.Crossref | GoogleScholarGoogle Scholar |
Wu, C, Gonsamo, A, Gough, CM, Chen, JM, and Xu, S (2014). Modeling growing season phenology in North American forests using seasonal mean vegetation indices from MODIS. Remote Sensing of Environment 147, 79–88.
| Modeling growing season phenology in North American forests using seasonal mean vegetation indices from MODIS.Crossref | GoogleScholarGoogle Scholar |
Xue, J, and Su, B (2017). Significant remote sensing vegetation indices: a review of developments and applications. Journal of Sensors 2017, 1353691.
| Significant remote sensing vegetation indices: a review of developments and applications.Crossref | GoogleScholarGoogle Scholar |
Zhou, M, and Carin, L (2015). Negative binomial process count and mixture modeling. IEEE Transactions on Pattern Analysis and Machine Intelligence 37, 307–320.
| Negative binomial process count and mixture modeling.Crossref | GoogleScholarGoogle Scholar | 26353243PubMed |
