How will snow retention and shading from Arctic shrub expansion affect caribou food resources?

References

• Addis CE, Bret-Harte MS. 2019. The importance of secondary growth to plant responses to snow in the Arctic. Funct Ecol. 33(6):1050–1066.
   Web of Science ®Google Scholar
• Albon SD, Langvatn R. 1992. Plant phenology and the benefits of migration in a temperate ungulate. Oikos. 65(3):502–513. doi:https://doi.org/10.2307/3545568.
   Web of Science ®Google Scholar
• Allen MS. 1996. Physical constraints on voluntary intake of forages by ruminants. J Anim Sci. 74(12):3063–3075. doi:https://doi.org/10.2527/1996.74123063x.
   PubMed Web of Science ®Google Scholar
• Barboza PS, Parker KL. 2006. Body protein stores and isotopic indicators of N balance in female reindeer (Rangifer tarandus) during winter. Physiol Biochem Zool. 79(3):628–644. doi:https://doi.org/10.1086/502811.
   PubMed Web of Science ®Google Scholar
• Barboza PS, Van Someren LL, Gustine DD, Bret-Harte MS. 2018. The nitrogen window for arctic herbivores: plant phenology and protein gain of migratory caribou (Rangifer tarandus). Ecosphere. 9(1):1–17. doi:https://doi.org/10.1002/ecs2.2073.
   Web of Science ®Google Scholar
• Beamish AL, Nijland W, Edwards M, Coops NC, Henry G. 2016. Phenology and vegetation change measurements from true colour digital photography in high Arctic tundra. Arct Sci. 2(2):33–49. doi:https://doi.org/10.1139/as-2014-0003.
   Web of Science ®Google Scholar
• Belsky AJ. 1992. Effects of trees on nutritional quality of understorey gramineous forage in tropical savannas. Trop Grasslands. 26(1):12–20.
   Google Scholar
• Bergerud AT. 1972. Food habits of newfoundland caribou. J Wildlife Manage. 36(3):913–923. doi:https://doi.org/10.2307/3799448.
   Web of Science ®Google Scholar
• Bergerud AT, Luttich SN, Camps L. 2007. The return of caribou to Ungava. Montreal: McGill-Queen’s University Press.
   Google Scholar
• Blok D, Heijmans MMPD, Schaepman-Strub G, Kononov AV, Maximov TC, Berendse F. 2010. Shrub expansion may reduce summer permafrost thaw in Siberian tundra. Glob Change Biol. 16(4):1296–1305. doi:https://doi.org/10.1111/j.1365-2486.2009.02110.x.
   Web of Science ®Google Scholar
• Boertje RD. 1990. Diet quality and intake requirements of adult female caribou of the Denali Herd, Alaska. J Appl Ecol. 27:420–434. doi:https://doi.org/10.2307/2404291.
   Web of Science ®Google Scholar
• Brathen KA, Hagberg O. 2004. More efficient estimation of plant biomass. J Veg Sci. 15(5):653–660. doi:https://doi.org/10.1111/j.1654-1103.2004.tb02307.x.
   Web of Science ®Google Scholar
• Brooker RW, Callaghan TV, Jonasson S. 1999. Nitrogen uptake by rhizomes of the clonal sedge Carex bigelowii: a previously overlooked nutritional benefit of rhizomatous growth. New Phytol. 142(1):35–48. doi:https://doi.org/10.1046/j.1469-8137.1999.00384.x.
   Web of Science ®Google Scholar
• Brooks PD, Grogan P, Templer PH, Groffman P, Öquist MG, Schimel J. 2011. Carbon and nitrogen cycling in snow–covered environments. Geography Compass. 5(9):682–699. doi:https://doi.org/10.1111/j.1749-8198.2011.00420.x.
   Google Scholar
• Bryant JP, Chapin FS, Klein DR. 1983. Carbon nutrient balance of boreal plants in relation to vertebrate herbivory. Oikos. 40(3):357–368. doi:https://doi.org/10.2307/3544308.
   Web of Science ®Google Scholar
• Bryant JP, Joly K, Chapin FS, DeAngelis DL, Kielland K. 2014. Can antibrowsing defense regulate the spread of woody vegetation in arctic tundra? Ecography. 37(3):204–211. doi:https://doi.org/10.1111/j.1600-0587.2013.00436.x.
   Web of Science ®Google Scholar
• Buckeridge KM, Grogan P. 2008. Deepened snow alters soil microbial nutrient limitations in arctic birch hummock tundra. Appl Soil Ecol. 39(2):210–222. doi:https://doi.org/10.1016/j.apsoil.2007.12.010.
   Web of Science ®Google Scholar
• Buckeridge KM, Zufelt E, Chu HY, Grogan P. 2010. Soil nitrogen cycling rates in low arctic shrub tundra are enhanced by litter feedbacks. Plant Soil. 330(1–2):407–421. doi:https://doi.org/10.1007/s11104-009-0214-8.
   Web of Science ®Google Scholar
• Canon SK, Urness PJ, DeByle NV. 1987. Habitat selection, foraging behavior, and dietary nutrition of elk in burned aspen forest. J Range Manage. 40:433–438.
   Google Scholar
• Chagnon C, Boudreau S. 2019. Shrub canopy induces a decline in lichen abundance and diversity in Nunavik (Québec, Canada). Arct Antarct Alp Res. 51(1):521–532. doi:https://doi.org/10.1080/15230430.2019.1688751.
   Web of Science ®Google Scholar
• Champagne E, Moore BD, Côté SD, Tremblay J-P. 2018. Spatial correlations between browsing on balsam fir by white-tailed deer and the nutritional value of neighboring winter forage. Ecol Evol. 8(5):2812–2823. doi:https://doi.org/10.1002/ece3.3878.
   PubMed Web of Science ®Google Scholar
• Cook JG, Quinlan LJ, Irwin LL, Bryant LD, Riggs RA, Thomas JW. 1996. Nutrition-growth relations of elk calves during late summer and fall. J Wild Manage. 60:528–541. doi:https://doi.org/10.2307/3802070.
   Web of Science ®Google Scholar
• Cooper EJ, Dullinger S, Semenchuk P. 2011. Late snowmelt delays plant development and results in lower reproductive success in the high Arctic. Plant Sci. 180(1):157–167. doi:https://doi.org/10.1016/j.plantsci.2010.09.005.
   PubMed Web of Science ®Google Scholar
• Corson D, Waghorn GC, Ulyatt MJ, Lee J. 1999. NIRS: forage analysis and livestock feeding. Pr N Z Grassl Assoc. 51:127–132.
   Google Scholar
• Crête M, Huot J. 1993. Regulation of a large herd of migratory caribou – summer nutrition affects calf growth and body reserves of darns. Can J Zool. 71(11):2291–2296. doi:https://doi.org/10.1139/z93-321.
   Web of Science ®Google Scholar
• Crête M, Huot J, Gauthier L. 1990. Food selection during early lactation by caribou calving on the tundra in Quebec. Arctic. 43(1):60–65.
   Web of Science ®Google Scholar
• Danell K, Utsi P, Palo R, Eriksson O. 1994. Food plant selection by reindeer during winter in relation to plant quality. Ecography. 17(2):153–158. doi:https://doi.org/10.1111/j.1600-0587.1994.tb00088.x.
   Web of Science ®Google Scholar
• Decruyenaere V, Lecomte PH, Demarquilly C, Aufrere J, Dardenne P, Stilmant D, Buldgen A. 2009. Evaluation of green forage intake and digestibility in ruminants using near infrared reflectance spectroscopy (NIRS): developing a global calibration. Anim Feed Sci Technol. 148(2–4):138–156. doi:https://doi.org/10.1016/j.anifeedsci.2008.03.007.
   Web of Science ®Google Scholar
• DeGabriel JL, Wallis IR, Moore BD, Foley WJ. 2008. A simple, integrative assay to quantify nutritional quality of browses for herbivores. Oecologia. 156(1):107–116. doi:https://doi.org/10.1007/s00442-008-0960-y.
   PubMed Web of Science ®Google Scholar
• Demmig-Adams B, Adams WW. 1992. Photoprotection and other responses of plants to high light stress. Annu Rev Plant Biol. 43(1):599–626. doi:https://doi.org/10.1146/annurev.pp.43.060192.003123.
   Web of Science ®Google Scholar
• Doiron M, Gauthier G, Lévesque E, Newman J. 2014. Effects of experimental warming on nitrogen concentration and biomass of forage plants for an arctic herbivore. J Ecol. 102(2):508–517. doi:https://doi.org/10.1111/1365-2745.12213.
   Web of Science ®Google Scholar
• Domine F, Barrere M, Morin S. 2016. The growth of shrubs on high arctic tundra at Bylot Island: impact on snow physical properties and permafrost thermal regime. Biogeosciences. 13(23):6471–6486. doi:https://doi.org/10.5194/bg-13-6471-2016.
   Web of Science ®Google Scholar
• Dudonné S, Dubé P, Anhê FF, Pilon G, Marette A, Lemire M, Harris C, Dewailly E, Desjardins Y. 2015. Comprehensive analysis of phenolic compounds and abscisic acid profiles of twelve native Canadian berries. J Food Compos Anal. 44:214–224. doi:https://doi.org/10.1016/j.jfca.2015.09.003.
   Web of Science ®Google Scholar
• Environment and Climate Change Canada. 2019. Climate normals and averages, daily data reports of Salluit station from 2015 to 2018 [Online database]. ( Consulted on August 8th 2019). Salluit (Canada). [ updated July 17th 2019. accessed 2019 August 8th]. https://climate.weather.gc.ca/climate_data/hourly_data_e.html?hlyRange=2014-07-03%7C2020-11-10&dlyRange=2014-07-03%7C2020-11-10&mlyRange=%7C&StationID=52378&Prov=QC&urlExtension=_e.html&searchType=stnName&optLimit=yearRange&StartYear=2015&EndYear=2018&selRowPerPage=25&Line=0&searchMethod=contains&Month=11&Day=10&txtStationName=Salluit&timeframe=1&Year=2020
   Google Scholar
• Fancy S, White R. 1987. Energy expenditures for locomotion by barren-ground caribou. Can J Zool. 65(1):122–128. doi:https://doi.org/10.1139/z87-018.
   Web of Science ®Google Scholar
• Feeny P. 1970. Seasonal changes in oak leaf tannins and nutrients as a cause of spring feeding by winter moth caterpillars. Ecology. 51(4):565–581. doi:https://doi.org/10.2307/1934037.
   Web of Science ®Google Scholar
• Fraser RH, Lantz TC, Olthof I, Kokelj SV, Sims RA. 2014. Warming-induced shrub expansion and lichen decline in the western Canadian Arctic. Ecosystems. 17(7):1151–1168. doi:https://doi.org/10.1007/s10021-014-9783-3.
   Web of Science ®Google Scholar
• Graglia E, Julkunen-Tiitto R, Shaver GR, Schmidt IK, Jonasson S, Michelsen A. 2001. Environmental control and intersite variations of phenolics in Betula nana in tundra ecosystems. New Phytol. 151(1):227–236. doi:https://doi.org/10.1046/j.1469-8137.2001.00149.x.
   PubMed Web of Science ®Google Scholar
• Hallinger M, Manthey M, Wilmking M. 2010. Establishing a missing link: warm summers and winter snow cover promote shrub expansion into alpine tundra in Scandinavia. New Phytol. 186(4):890–899. doi:https://doi.org/10.1111/j.1469-8137.2010.03223.x.
   PubMed Web of Science ®Google Scholar
• Hansen AH, Jonasson S, Michelsen A, Julkunen-Tiitto R. 2006. Long-term experimental warming, shading and nutrient addition affect the concentration of phenolic compounds in arctic-alpine deciduous and evergreen dwarf shrubs. Oecologia. 147(1):1–11. doi:https://doi.org/10.1007/s00442-005-0233-y.
   PubMed Web of Science ®Google Scholar
• Hatier J-HB, Gould KS. 2008. Anthocyanin function in vegetative organs. In: Gould K, Davies KM, Winefield C, editors. Anthocyanins. New-York: United States: Springer. p. 1–19.
   Google Scholar
• Herfindal I, Saether B-E, Solberg EJ, Andersen R, Høgda KA. 2006. Population characteristics predict responses in moose body mass to temporal variation in the environment. J Anim Ecol. 75(5):1110–1118. doi:https://doi.org/10.1111/j.1365-2656.2006.01138.x.
   PubMed Web of Science ®Google Scholar
• Hjältén J, Palo T. 1992. Selection of deciduous trees by free ranging voles and hares in relation to plant chemistry. Oikos. 63:477–484. doi:https://doi.org/10.2307/3544975.
   Web of Science ®Google Scholar
• Johnson HE, Gustine DD, Golden TS, Adams LG, Parrett LS, Lenart EA, Barboza PS. 2018. NDVI exhibits mixed success in predicting spatiotemporal variation in caribou summer forage quality and quantity. Ecosphere. 9(10):1–19. doi:https://doi.org/10.1002/ecs2.2461.
   Web of Science ®Google Scholar
• Jonasson S. 1988. Evaluation of the point intercept method for the estimation of plant biomass. Oikos. 52(1):101–106. doi:https://doi.org/10.2307/3565988.
   Web of Science ®Google Scholar
• Jonasson S, Michelsen A, Schmidt IK, Nielsen EV. 1999. Responses in microbes and plants to changed temperature, nutrient, and light regimes in the arctic. Ecology. 80(6):1828–1843. doi:https://doi.org/10.1890/0012-9658(1999)080[1828:RIMAPT]2.0.CO;2.
   Web of Science ®Google Scholar
• Kephart KD, Buxton DR. 1993. Forage quality responses of C3 and C4 perennial grasses to shade. Crop Sci. 33(4):831–837. doi:https://doi.org/10.2135/cropsci1993.0011183X003300040040x.
   Web of Science ®Google Scholar
• Klein DR. 1990. Variation in quality of caribou and reindeer forage plants associated with season, plant part, and phenology. Rangifer. 10(3):123–130. doi:https://doi.org/10.7557/2.10.3.841.
   Google Scholar
• Kuropat P, Bryant JP. 1980. Foraging behaviour of cow caribou on the Utukok calving grounds in northwestern Alaska. In: Reimers E, Gaare E, Skjenneberg S, editors. Proceedings of the Second International Reindeer/Caribou Symposium; September 17-21, 1979; Røros, Norway. Trondheim (Norway) : Direktoratet for vilt og ferskvannfisk. p. 64–70.
   Google Scholar
• Langvatn R, Albon SD, Burkey T, CluttonBrock TH. 1996. Climate, plant phenology and variation in age of first reproduction in a temperate herbivore. J Anim Ecol. 65(5):653–670. doi:https://doi.org/10.2307/5744.
   Web of Science ®Google Scholar
• Lawrence DM, Swenson SC. 2011. Permafrost response to increasing arctic shrub abundance depends on the relative influence of shrubs on local soil cooling versus large-scale climate warming. Environ Res Lett. 6(4):1–9. doi:https://doi.org/10.1088/1748-9326/6/4/045504.
   Web of Science ®Google Scholar
• Lenart EA, Bowyer RT, Hoef JV, Ruess RW. 2002. Climate change and caribou: effects of summer weather on forage. Can J Zool. 80(4):664–678. doi:https://doi.org/10.1139/z02-034.
   Web of Science ®Google Scholar
• Lenth RV. 2016. Least-squares means: the R package lsmeans. J Stat Softw. 69(1):1–33. doi:https://doi.org/10.18637/jss.v069.i01.
   Web of Science ®Google Scholar
• Manseau M, Gauthier G. 1993. Interactions between greater snow geese and their rearing habitat. Ecology. 74(7):2045–2055. doi:https://doi.org/10.2307/1940850.
   Web of Science ®Google Scholar
• Marsh P, Bartlett P, MacKay M, Pohl S, Lantz T. 2010. Snowmelt energetics at a shrub tundra site in the western Canadian Arctic. Hydrol Process. 24(25):3603–3620. doi:https://doi.org/10.1002/hyp.7786.
   Web of Science ®Google Scholar
• Mattson WJ. 1980. Herbivory in relation to plant nitrogen content. Annu Rev Ecol Evol S. 11(1):119–161. doi:https://doi.org/10.1146/annurev.es.11.110180.001003.
   Web of Science ®Google Scholar
• McEwan EH, Whitehead PE. 1970. Seasonal changes in the energy and nitrogen intake in reindeer and caribou. Can J Zool. 48(5):905–913. doi:https://doi.org/10.1139/z70-164.
   PubMed Web of Science ®Google Scholar
• McKinney AM, Goodell K. 2010. Shading by invasive shrub reduces seed production and pollinator services in a native herb. Biol Invasions. 12(8):2751–2763. doi:https://doi.org/10.1007/s10530-009-9680-4.
   Web of Science ®Google Scholar
• McSweeney CS, Palmer B, McNeill DM, Krause DO. 2001. Microbial interactions with tannins: nutritional consequences for ruminants. Anim Feed Sci Technol. 91(1–2):83–93. doi:https://doi.org/10.1016/S0377-8401(01)00232-2.
   Web of Science ®Google Scholar
• Ministère des Forêts, de la Faune et des Parcs. 2018. Cartographie écologique du Nord québécois. Récupéré le 2019 août 12. du site du ministère. [ updated March 2019; accessed August 12th 2019]. Québec. https://mffp.gouv.qc.ca/documents/forets/inventaire/Carte_24x36_vegetation_francais.pdf
   Google Scholar
• Ministère des Forêts, de la Faune et des Parcs du Québec. 2017. Carte de distribution du pergélisol. Récupéré le 2019 août 12. du site du ministère. Québec. [ updated March 2019. accessed August 12th 2019]. https://mffp.gouv.qc.ca/wp-content/uploads/Carte_24x36_pergelisol_francais.pdf
   Google Scholar
• Murai-Hatano M, Kuwagata T, Sakurai J, Nonami H, Ahamed A, Nagasuga K, Matsunami T, Fukushi K, Maeshima M, Okada M. 2008. Effect of low root temperature on hydraulic conductivity of rice plants and the possible role of aquaporins. Plant Cell Physiol. 49(9):1294–1305. doi:https://doi.org/10.1093/pcp/pcn104.
   PubMed Web of Science ®Google Scholar
• Myers-Smith IH, Forbes BC, Wilmking M, Hallinger M, Lantz T, Blok D, Tape KD, Macias-Fauria M, Sass-Klaassen U, Lévesque E, et al. 2011. Shrub expansion in tundra ecosystems: dynamics, impacts and research priorities. Environ Res Lett. 6(4):1–15. doi:https://doi.org/10.1088/1748-9326/6/4/045509
   Web of Science ®Google Scholar
• Myers-Smith IH, Hik DS. 2013. Shrub canopies influence soil temperatures but not nutrient dynamics: an experimental test of tundra snow-shrub interactions. Ecol Evol. 3(11):3683–3700. doi:https://doi.org/10.1002/ece3.710.
   PubMed Web of Science ®Google Scholar
• Næs T, Martens H. 1988. Principal component regression in NIR analysis: viewpoints, background details and selection of components. J Chemom. 2(2):155–167. doi:https://doi.org/10.1002/cem.1180020207.
   Google Scholar
• Nobrega S, Grogan P. 2007. Deeper snow enhances winter respiration from both plant-associated and bulk soil carbon pools in birch hummock tundra. Ecosystems. 10(3):419–431. doi:https://doi.org/10.1007/s10021-007-9033-z.
   Web of Science ®Google Scholar
• Pajunen AM, Oksanen J, Virtanen R. 2011. Impact of shrub canopies on understorey vegetation in western Eurasian tundra. J Veg Sci. 22(5):837–846. doi:https://doi.org/10.1111/j.1654-1103.2011.01285.x.
   Web of Science ®Google Scholar
• Palo RT, Robbins CT. 1991. Plant defenses against mammalian herbivory. Boca Raton (Florida): CRC Press.
   Google Scholar
• Paradis M, Lévesque E, Boudreau S. 2016. Greater effect of increasing shrub height on winter versus summer soil temperature. Environ Res Lett. 11(8):1–13. doi:https://doi.org/10.1088/1748-9326/11/8/085005.
   Web of Science ®Google Scholar
• Parker KL, Barboza PS, Stephenson TR. 2005. Protein conservation in female caribou (Rangifer tarandus): effects of decreasing diet quality during winter. J Mammal. 86(3):610–622. doi:https://doi.org/10.1644/1545-1542(2005)86[610:PCIFCR]2.0.CO;2.
   Web of Science ®Google Scholar
• Pinheiro J, Bates D, DebRoy S, Sarkar D, Core Team R. 2016. nlme: linear and nonlinear mixed effect models. R package version 31-128.
   Google Scholar
• Plante S, Champagne E, Ropars P, Boudreau S, Lévesque E, Tremblay B, Tremblay J-P. 2014. Shrub cover in northern Nunavik: can herbivores limit shrub expansion? Polar Biol. 37(5):611–619. doi:https://doi.org/10.1007/s00300-014-1461-6.
   Web of Science ®Google Scholar
• Polák T, Rock BN, Campbell PE, Soukupová J, Solcová B, Zvára K, Albrechtová J. 2006. Shoot growth processes, assessed by bud development types, reflect Norway spruce vitality and sink prioritization. Forest Ecol Manag. 225(1–3):337–348. doi:https://doi.org/10.1016/j.foreco.2006.01.027.
   Web of Science ®Google Scholar
• Pomeroy JW, Bewley DS, Essery RLH, Hedstrom NR, Link T, Granger RJ, Sicart JE, Ellis CR, Janowicz JR. 2006. Shrub tundra snowmelt. Hydrol Process. 20(4):923–941. doi:https://doi.org/10.1002/hyp.6124.
   Web of Science ®Google Scholar
• R Core Team. 2019. R: a language and environment for statistical computing. Vienna (Austria):R Foundation for Statistical Computing.
   Google Scholar
• Reeves JB. 1987. Lignin and fiber compositional changes in forages over a growing season and their effects on in vitro digestibility. J Dairy Sci. 70(8):1583–1594. doi:https://doi.org/10.3168/jds.S0022-0302(87)80186-8.
   Web of Science ®Google Scholar
• Ropars P, Boudreau S. 2012. Shrub expansion at the forest-tundra ecotone: spatial heterogeneity linked to local topography. Environ Res Lett. 7(1):1–9. doi:https://doi.org/10.1088/1748-9326/7/1/015501.
   Web of Science ®Google Scholar
• Ropars P, Lévesque E, Boudreau S. 2015. Shrub densification heterogeneity in subarctic regions: the relative influence of historical and topographic variables. Écoscience. 22(2–4):83–95. doi:https://doi.org/10.1080/11956860.2015.1107262.
   Web of Science ®Google Scholar
• Schimel JP, Bilbrough C, Welker JA. 2004. Increased snow depth affects microbial activity and nitrogen mineralization in two arctic tundra communities. Soil Biol Biochem. 36(2):217–227. doi:https://doi.org/10.1016/j.soilbio.2003.09.008.
   Web of Science ®Google Scholar
• Semenchuk PR, Elberling B, Amtorp C, Winkler J, Rumpf S, Michelsen A, Cooper EJ. 2015. Deeper snow alters soil nutrient availability and leaf nutrient status in high arctic tundra. Biogeochemistry. 124(1–3):81–94. doi:https://doi.org/10.1007/s10533-015-0082-7.
   Web of Science ®Google Scholar
• Shaver G, Chapin F III, Gartner BL. 1986. Factors limiting seasonal growth and peak biomass accumulation in Eriophorum vaginatum in Alaskan tussock tundra. J Ecol. 74:257–278. doi:https://doi.org/10.2307/2260362.
   Web of Science ®Google Scholar
• Shenk J, Westerhaus M. 1991. Population definition, sample selection, and calibration procedures for near infrared reflectance spectroscopy. Crop Sci. 31(2):469–474. doi:https://doi.org/10.2135/cropsci1991.0011183X003100020049x.
   Web of Science ®Google Scholar
• Sinclair ARE, Krebs CJ, Smith JNM. 1982. Diet quality and food limitation in herbivores: the case of the snowshoe hare. Can J Zool. 60(5):889–897. doi:https://doi.org/10.1139/z82-121.
   Web of Science ®Google Scholar
• Singleton VL, Rossi JA. 1965. Colorimetry of total phenolics with phosphotungstic acid reagents. Am J Enol Vitic. 16:144–158.
   Google Scholar
• Sturm M, McFadden JP, Liston GE, Chapin FS, Racine CH, Holmgren J. 2001. Snow-shrub interactions in arctic tundra: a hypothesis with climatic implications. J Clim. 14(3):336–344. doi:https://doi.org/10.1175/1520-0442(2001)014<0336:SSIIAT>2.0.CO;2.
   Web of Science ®Google Scholar
• Sturm M, Schimel J, Michaelson G, Welker JM, Oberbauer SF, Liston GE, Fahnestock J, Romanovsky VE. 2005. Winter biological processes could help convert arctic tundra to shrubland. BioScience. 55(1):17–26. doi:https://doi.org/10.1641/0006-3568(2005)055[0017:WBPCHC]2.0.CO;2.
   Web of Science ®Google Scholar
• Taillon J, Barboza PS, Côté SD. 2013. Nitrogen allocation to offspring and milk production in a capital breeder. Ecology. 94(8):1815–1827. doi:https://doi.org/10.1890/12-1424.1.
   PubMed Web of Science ®Google Scholar
• Taillon J, Brodeur V, Festa-Bianchet M, Côté SD. 2012. Is mother condition related to offspring condition in migratory caribou (Rangifer tarandus) at calving and weaning? Can J Zool. 90(3):393–402. doi:https://doi.org/10.1139/z2012-001.
   Web of Science ®Google Scholar
• Tape KD, Gustine DD, Ruess RW, Adams LG, Clark JA, Crowther MS. 2016. Range expansion of moose in Arctic Alaska linked to warming and increased shrub habitat. PLoS One. 11(4):e0152636. doi:https://doi.org/10.1371/journal.pone.0152636.
   PubMed Web of Science ®Google Scholar
• Torp M, Olofsson J, Witzell J, Baxter R. 2010a. Snow-induced changes in dwarf birch chemistry increase moth larval growth rate and level of herbivory. Polar Biol. 33(5):693–702. doi:https://doi.org/10.1007/s00300-009-0744-9.
   Web of Science ®Google Scholar
• Torp M, Witzell J, Baxter R, Olofsson J. 2010b. The effect of snow on plant chemistry and invertebrate herbivory: experimental manipulations along a natural snow gradient. Ecosystems. 13(5):741–751. doi:https://doi.org/10.1007/s10021-010-9351-4.
   Web of Science ®Google Scholar
• Turunen M, Soppela P, Kinnunen H, Sutinen ML, Martz F. 2009. Does climate change influence the availability and quality of reindeer forage plants? Polar Biol. 32(6):813–832. doi:https://doi.org/10.1007/s00300-009-0609-2.
   Web of Science ®Google Scholar
• Van der Wal R, Madan N, van Lieshout S, Dormann C, Langvatn R, Albon SD. 2000. Trading forage quality for quantity? Plant phenology and patch choice by Svalbard reindeer. Oecologia. 123(1):108–115. doi:https://doi.org/10.1007/s004420050995.
   PubMed Web of Science ®Google Scholar
• Walker DA, Raynolds MK, Daniels FJA, Einarsson E, Elvebakk A, Gould WA, Katenin AE, Kholod SS, Markon CJ, Melnikov ES, et al. 2005. The circumpolar arctic vegetation map. J Veg Sci. 16(3):267–282. doi:https://doi.org/10.1111/j.1654-1103.2005.tb02365.x
   Web of Science ®Google Scholar
• Walsh NE, McCabe TR, Welker JM, Parsons AN. 1997. Experimental manipulations of snow‐depth: effects on nutrient content of caribou forage. Glob Change Biol. 3:158–164. doi:https://doi.org/10.1111/j.1365-2486.1997.gcb142.x.
   Web of Science ®Google Scholar
• Walters MB, Reich PB. 1997. Growth of Acer saccharum seedlings in deeply shaded understories of northern Wisconsin: effects of nitrogen and water availability. Can J Forest Res. 27(2):237–247. doi:https://doi.org/10.1139/x96-178.
   Google Scholar
• Weijers S, Myers-Smith IH, Löffler J. 2018. A warmer and greener cold world: summer warming increases shrub growth in the alpine and high arctic tundra. Erdkunde. 72(1):63–85. doi:https://doi.org/10.3112/erdkunde.2018.01.04.
   Web of Science ®Google Scholar
• Weintraub MN, Schimel JP. 2003. Interactions between carbon and nitrogen mineralization and soil organic matter chemistry in arctic tundra soils. Ecosystems. 6(2):129–143. doi:https://doi.org/10.1007/s10021-002-0124-6.
   Web of Science ®Google Scholar
• Weintraub MN, Schimel JP. 2005. Nitrogen cycling and the spread of shrubs control changes in the carbon balance of arctic tundra ecosystems. BioScience. 55(5):408–415. doi:https://doi.org/10.1641/0006-3568(2005)055[0408:NCATSO]2.0.CO;2.
   Web of Science ®Google Scholar
• Welker JM, Fahnestock JT, Sullivan PF, Chimner RA. 2005. Leaf mineral nutrition of arctic plants in response to warming and deeper snow in northern Alaska. Oikos. 109(1):167–177. doi:https://doi.org/10.1111/j.0030-1299.2005.13264.x.
   Web of Science ®Google Scholar
• White RG. 1983. Foraging patterns and their multiplier effects on productivity of northern ungulates. Oikos. 40:377–384. doi:https://doi.org/10.2307/3544310.
   Web of Science ®Google Scholar
• White TC. 1993. The inadequate environment: nitrogen and the abundance of animals. Berlin (Germany): Springer-Verlag.
   Google Scholar