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Long-term changes in the primary productivity of migratory caribou (Rangifer tarandus) calving grounds and summer pasture on the Quebec-Labrador Peninsula (Northeastern Canada): the mixed influences of climate change and caribou herbivory

  • Allen Brett CampeauEmail author
  • Gregory J. M. Rickbeil
  • Nicholas C. Coops
  • Steeve D. Côté
Original Paper
  • 42 Downloads

Abstract

At high herbivore density, herbivory can reduce forage abundance, potentially contributing to habitat degradation and driving changes in herbivore population size or range use, in accordance with the exploitation ecosystem hypothesis. The migratory Rivière-George caribou herd (RGH, Rangifer tarandus) of the Quebec-Labrador Peninsula (Canada) has experienced a large decline in population size since the population peaked in the early 1990s, with similarly large changes in seasonal range use. Demographic changes are suspected to have influenced forage abundance and caribou range use through density-dependent interactions between caribou and their habitat. We used the Normalized Difference Vegetation Index (NDVI) to examine relationships between RGH caribou density and range productivity from 1991 to 2011. A modelling approach was used to control for the response of climate and to isolate the influence of caribou herbivory on primary productivity. Significant negative relationships were identified between caribou density and primary productivity, after controlling for climatic variation, for the global RGH calving grounds (r2 = 0.54–0.55) and summer range (r2 = 0.42–0.51), but not for the “core” ranges, where caribou density was highest. Positive temporal trends in primary productivity appeared to reflect the decline in RGH population size, suggesting vegetation recovery following reductions in caribou abundance. Climate warming (of up to + 1.5 °C per decade) was most responsible for the strong positive trends in primary productivity observed over the 1991–2011 period, but decreases in RGH herbivory likely also contributed to the increases in range productivity. Forage access likely improved over the study period, which may have influenced RGH range use and habitat selection.

Keywords

Caribou Herbivory Exploitation ecosystem hypothesis Remote sensing Primary productivity Climate change 

Notes

Acknowledgements

We thank the many partners of Caribou Ungava, especially The Natural Sciences and Engineering Research Council of Canada (NSERC) and the Quebec and Newfoundland-Labrador governments, for generously contributing to our work. We are especially appreciative of contributions made by M. Le Corre to the manuscript. We also thank M. Leblond and A. Panagakis for their comments on an early draft. Finally, we wish to thank all members of Caribou Ungava and the UBC Integrated Remote Sensing Studio (IRSS) who offered their assistance during the development of this paper. The long-term datasets used in this study could not have been collected without the technical expertise and continued financial support of these organisations and our other partners: ArcticNet; Fonds de recherche sur la nature et les technologies du Québec; Hydro Québec; La Fédération des pourvoiries du Québec; La Fédération québécoise des chasseurs et pêcheurs; First Air; Makivik Corporation; The CircumArctic Rangifer Monitoring and Assessment (CARMA) Network; International Polar Year; Canada Foundation for Innovation; Institute for Environmental Monitoring and Research; La Fondation de la faune du Québec; Ouranos; Canadian Wildlife Federation; Azimut Exploration;  La Conférence régionale des élus de la Baie-James; Le Fonds vert du Québec; Tata Steel; Mine Raglan: Une compagnie Glencore; The Torngat Wildlife, Plants & Fisheries Secretariat; Air Inuit; The Grand Council of the Crees; Redevances Aurifères Osisko Ltée.

Compliance with ethical standards

Animal and human rights

All animals were used in compliance with ethical and animal care standards, and the minimum number of animals necessary for a large-scale telemetry programme were used.

Conflict of interest

The authors have no conflicts of interest to report.

References

  1. Allard A (2003) Detection of vegetation degradation on Swedish mountainous heaths at an early stage by image interpretation. Ambio 32:510–519CrossRefGoogle Scholar
  2. Allard M, Lemay M (2012) Nunavik and Nunatsiavut: from science to policy. An integrated regional impact study (IRIS) of climate change and modernization. ArcticNet Inc, Quebec CityGoogle Scholar
  3. Anderson DR, Burnham KP (2002) Avoiding pitfalls when using information-theoretic methods. J Wildl Manag 66:912–918CrossRefGoogle Scholar
  4. Apps CD, McLellan BN, Kinley TA, Serrouya R, Seip DR, Wittmer HU (2013) Spatial factors related to mortality and population decline of endangered mountain caribou. J Wildl Manag 77:1409–1419CrossRefGoogle Scholar
  5. Archer ERM (2004) Beyond the "climate versus grazing" impasse: using remote sensing to investigate the effects of grazing system choice on vegetation cover in the eastern Karoo. J Arid Environ 57:381–408CrossRefGoogle Scholar
  6. Auger S, Payette S (2010) Four millennia of woodland structure and dynamics at the Arctic treeline of eastern Canada. Ecology 91:1367–1379CrossRefGoogle Scholar
  7. Aunapuu M, Dahlgren J, Oksanen T, Grellmann D, Oksanen L, Olofsson J, Rammul U, Schneider M, Johansen B, Hygen HO (2008) Spatial patterns and dynamic responses of arctic food webs corroborate the exploitation ecosystems hypothesis (EEH). Am Nat 171:249–262CrossRefGoogle Scholar
  8. Austin D, McMillan JI, Bowen WD (2003) A three-stage algorithm for filtering erroneous Argos satellite locations. Mar Mamm Sci 19:371–383CrossRefGoogle Scholar
  9. Bergerud AT (1996) Evolving perspectives on caribou population dynamics, have we got it right yet? Rangifer 16:95–116CrossRefGoogle Scholar
  10. Bergerud AT, Luttich SN (2003) Predation risk and optimal foraging trade-off in the demography and spacing of the George River Herd, 1958 to 1993. Rangifer 23:169–191CrossRefGoogle Scholar
  11. Bergerud AT, Luttich SN, Camps L (2008) The Return of Caribou to Ungava. McGill-Queen’s University Press, Montreal and KingstonGoogle Scholar
  12. Boertje RD (1984) Seasonal diets of the Denali caribou herd, Alaska. Arctic 37:161–165CrossRefGoogle Scholar
  13. Bookhout TA (1996) Research and management techniques for wildife and habitats. The Wildlife Society, BethesdaGoogle Scholar
  14. Boudreau S, Payette S (2004) Caribou-induced changes in species dominance of lichen woodlands: an analysis of plant remains. Am J Bot 91:422–429CrossRefGoogle Scholar
  15. Boudreau S, Payette S, Morneau C, Couturier S (2003) Recent decline of the George River Caribou herd as revealed by tree-ring analysis. Arctic Antarct Alpine Res 35:187–195CrossRefGoogle Scholar
  16. Boulet M, Couturier S, Côté SD, Otto RD, Bernatchez L (2007) Integrative use of spatial, genetic, and demographic analyses for investigating genetic connectivity between migratory, montane, and sedentary caribou herds. Mol Ecol 16:4223–4240CrossRefGoogle Scholar
  17. Calenge C (2006) The package adehabitat for the R software: a tool for the analysis of space and habitat use by animals. Ecol Model 197:516–519CrossRefGoogle Scholar
  18. CAVM Team (2003) Circumpolar arctic vegetation map. (1:7,500,000 scale) Conservation of arctic flora and fauna (CAFF) Map No 1. US Fish and Wildlife Service, Anchorage, AlaskaGoogle Scholar
  19. Colpaert A, Kumpula J (2012) Detecting changes in the state of reindeer pastures in northernmost Finland, 1995–2005. Polar Rec 48:74–82CrossRefGoogle Scholar
  20. Côté SD, Rooney TP, Tremblay J-P, Dussault C, Waller DM (2004) Ecological impacts of deer overabundance. Annu Rev Ecol, Evol, Syst 35:113–147CrossRefGoogle Scholar
  21. Couturier S, Brunelle J, Vandal D, St-Martin G (1990) Changes in the population-dynamics of the George River caribou herd, 1976–1987. Arctic 43:9–20CrossRefGoogle Scholar
  22. Couturier S, Jean D, Otto RD, Rivard S (2004) Demography of the Migratory Tundra Caribou (Rangifer tarandus) of the Nord-du-Québec region and Labrador. Ministère des Ressources Naturelles, de la Faune et des Parcs, QuébecGoogle Scholar
  23. Couturier S, Côté SD, Huot J, Otto RD (2009) Body-condition dynamics in a northern ungulate gaining fat in winter. Can J Zool 87:367–378CrossRefGoogle Scholar
  24. Crête M (1999) The distribution of deer biomass in North America supports the hypothesis of exploitation ecosystems. Ecol Lett 2:223–227CrossRefGoogle Scholar
  25. Crête M, Huot J (1993) Regulation of a large herd of migratory caribou—summer nutrition affects calf growth and body reserves of dams. Can J Zool 71:2291–2296CrossRefGoogle Scholar
  26. Crête M, Doucet GJ (1998) Persistent suppression in dwarf birch after release from heavy summer browsing by caribou. Arctic Alpine Res 30:126–132CrossRefGoogle Scholar
  27. Crête M, Huot J, Gauthier L (1990) Food selection during early lactation by caribou calving on the tundra in Quebec. Arctic 43:60–65CrossRefGoogle Scholar
  28. Fauchald P, Park T, Tømmervik H, Myneni R, Hausner VH (2017) Arctic greening from warming promotes declines in caribou populations. Sci Adv 3:e1601365CrossRefGoogle Scholar
  29. Ferguson MAD, Gauthier L, Messier F (2001) Range shift and winter foraging ecology of a population of Arctic tundra caribou. Can J Zool 79:746–758CrossRefGoogle Scholar
  30. Festa-Bianchet M, Ray JC, Boutin S, Côté SD, Gunn A (2011) Conservation of caribou (Rangifer tarandus) in Canada: an uncertain future. Can J Zool 89:419–434CrossRefGoogle Scholar
  31. Fraser RH, Olthof I, Carrière M, Deschamps A, Pouliot D (2011) Detecting long-term changes to vegetation in northern Canada using the Landsat satellite image archive. Environ Res Lett 6:045502CrossRefGoogle Scholar
  32. Fretwell SD (1977) Regulation of plant communities by food-chains exploiting them. Persp Biol Med 20:169–185CrossRefGoogle Scholar
  33. Fryxell JM, Sinclair ARE (1988) Causes and consequences of migration by large herbivores. Trends Ecol Evol 3:237–241CrossRefGoogle Scholar
  34. Gough L, Moore JC, Shaver GR, Simpson RT, Johnson DR (2012) Above- and belowground responses of arctic tundra ecosystems to altered soil nutrients and mammalian herbivory. Ecology 93:1683–1694CrossRefGoogle Scholar
  35. Gunn A, Miller FL (1986) Traditional behaviour and fidelity to caribou calving grounds by barren-grounds caribou. Rangifer 6:151–158CrossRefGoogle Scholar
  36. Hachem S, Allard M, Duguay C (2009) Using the MODIS land surface temperature product for mapping permafrost: an application to Northern Quebec and Labrador, Canada. Permafrost Periglac Process 20:407–416CrossRefGoogle Scholar
  37. Hansen BB, Henriksen S, Aanes R, Saether BE (2007) Ungulate impact on vegetation in a two-level trophic system. Polar Biol 30:549–558CrossRefGoogle Scholar
  38. Hansen BB, Aanes R, Herfindal I, Saether BE, Henriksen S (2009) Winter habitat space use in a large arctic herbivore facing contrasting forage abundance. Polar Biol 32:971–984CrossRefGoogle Scholar
  39. Heard DC, Williams TM, Melton DA (1996) The relationship between food intake and predation risk in migratory caribou and implications to caribou and wolf population dynamics. Rangifer 16:37–44CrossRefGoogle Scholar
  40. Hebblewhite M, Merrill EH (2009) Trade-offs between predation risk and forage differ between migrant strategies in a migratory ungulate. Ecology 90:3445–3454CrossRefGoogle Scholar
  41. Henry GHR, Gunn A (1991) Recovery of tundra vegetation after overgrazing by caribou in Arctic Canada. Arctic 44:38–42CrossRefGoogle Scholar
  42. Horne JS, Garton EO, Krone SM, Lewis JS (2007) Analyzing animal movements using Brownian bridges. Ecology 88:2354–2363CrossRefGoogle Scholar
  43. Ju JC, Masek JG (2016) The vegetation greenness trend in Canada and US Alaska from 1984–2012 Landsat data. Remote Sens Environ 176:1–16CrossRefGoogle Scholar
  44. Klein DR (1987) Vegetation recovery patterns following overgrazing by reindeer on St-Matthew-Island. J Range Manag 40:336–338CrossRefGoogle Scholar
  45. Klein DR, Shulski M (2009) Lichen recovery following heavy grazing by reindeer delayed by climate warming. Ambio 38:11–16CrossRefGoogle Scholar
  46. Kumpula J, Kurkilahti M, Helle T, Colpaert A (2014) Both reindeer management and several other land use factors explain the reduction in ground lichens (Cladonia spp.) in pastures grazed by semi-domesticated reindeer in Finland. Regional Environ Change 14:541–559CrossRefGoogle Scholar
  47. Latifovic R, Trishchenko AP, Chen J, Park WB, Khlopenkov KV, Fernandes R, Pouliot D, Ungureanu C, Luo Y, Wang S, Davidson A, Cihlar J (2005) Generating historical AVHRR 1 km baseline satellite data records over Canada suitable for climate change studies. Can J Remote Sens 31:324–346CrossRefGoogle Scholar
  48. Le Corre M, Dussault C, Côté SD (2014) Detecting changes in the annual movements of terrestrial migratory species: using the first-passage time to document the spring migration of caribou. Mov Ecol 2:19.CrossRefGoogle Scholar
  49. Leader-Williams N (1980) Population-dynamics and mortality of reindeer introduced into South Georgia. J Wildl Manag 44:640–657CrossRefGoogle Scholar
  50. Legagneux P, Gauthier G, Berteaux D, Bety J, Cadieux MC, Bilodeau F, Bolduc E, McKinnon L, Tarroux A, Therrien JF, Morissette L, Krebs CJ (2012) Disentangling trophic relationships in a High Arctic tundra ecosystem through food web modeling. Ecology 93:1707–1716CrossRefGoogle Scholar
  51. Manseau M, Huot J, Crete M (1996) Effects of summer grazing by caribou on composition and productivity of vegetation: community and landscape level. J Ecol 84:503–513CrossRefGoogle Scholar
  52. Mazerolle MJ (2014) AICcmodavg: model selection and multimodel inference based on (Q)AIC(c). R package version 2.0-1.Google Scholar
  53. McManus KM, Morton DC, Masek JG, Wang DD, Sexton JO, Nagol JR, Ropars P, Boudreau S (2012) Satellite-based evidence for shrub and graminoid tundra expansion in northern Quebec from 1986 to 2010. Glob Change Biol 18:2313–2323CrossRefGoogle Scholar
  54. Mesinger F, DiMego G, Kalnay E, Mitchell K, Shafran PC, Ebisuzaki W, Jovic D, Woollen J, Rogers E, Berbery EH, Ek MB, Fan Y, Grumbine R, Higgins W, Li H, Lin Y, Manikin G, Parrish D, Shi W (2006) North American regional reanalysis. Bull Am Meteorol Soc 87:343CrossRefGoogle Scholar
  55. Messier F, Huot J, Lehenaff D, Luttich S (1988) Demography of the George River caribou herd: evidence of population regulation by forage exploitation and range expansion. Arctic 41:279–287CrossRefGoogle Scholar
  56. Morris RJ (2008) Community ecology: how green is the Arctic tundra? Curr Biol 18:R256–R258CrossRefGoogle Scholar
  57. Mueller T, Olson KA, Fuller TK, Schaller GB, Murray MG, Leimgruber P (2008) In search of forage: predicting dynamic habitats of Mongolian gazelles using satellite-based estimates of vegetation productivity. J Appl Ecol 45:649–658CrossRefGoogle Scholar
  58. Myers-Smith IH, Forbes BC, Wilmking M, Hallinger M, Lantz T, Blok D, Tape KD, Macias-Fauria M, Sass-Klaassen U, Levesque E, Boudreau S, Ropars P, Hermanutz L, Trant A, Collier LS, Weijers S, Rozema J, Rayback SA, Schmidt NM, Schaepman-Strub G, Wipf S, Rixen C, Menard CB, Venn S, Goetz S, Andreu-Hayles L, Elmendorf S, Ravolainen V, Welker J, Grogan P, Epstein HE, Hik DS (2011) Shrub expansion in tundra ecosystems: dynamics, impacts and research priorities. Environ Res Lett 6:045509CrossRefGoogle Scholar
  59. Nelson T, Coops NC, Wulder M, Perez L, Fitterer J, Powers R, Fontana F (2014) Predicting climate change impacts to the canadian boreal forest. Diversity 6:133–157CrossRefGoogle Scholar
  60. Newton EJ, Pond BA, Brown GS, Abraham KF, Schaefer JA (2014) Remote sensing reveals long-term effects of caribou on tundra vegetation. Polar Biol 37:715–725CrossRefGoogle Scholar
  61. Oksanen L, Fretwell SD, Arruda J, Niemela P (1981) Exploitation ecosystems in gradients of primary productivity. Am Nat 118:240–261CrossRefGoogle Scholar
  62. Olofsson J, Kitti H, Rautiainen P, Stark S, Oksanen L (2001) Effects of summer grazing by reindeer on composition of vegetation, productivity and nitrogen cycling. Ecography 24:13–24CrossRefGoogle Scholar
  63. Olofsson J, Stark S, Oksanen L (2004) Reindeer influence on ecosystem processes in the tundra. Oikos 105:386–396CrossRefGoogle Scholar
  64. Pajunen A, Virtanen R, Roininen H (2008) The effects of reindeer grazing on the composition and species richness of vegetation in forest-tundra ecotone. Polar Biol 31:1233–1244CrossRefGoogle Scholar
  65. Payette S (1983) The forest tundra and present tree-lines of northern Quebec-Labrador Peninsula. Nordicana 47:3–23Google Scholar
  66. Pettorelli N, Vik JO, Mysterud A, Gaillard JM, Tucker CJ, Stenseth NC (2005) Using the satellite-derived NDVI to assess ecological responses to environmental change. Trends Ecol Evol 20:503–510CrossRefGoogle Scholar
  67. Pinheiro J, Bates D, DebRoy S, Sarkar D, R Core Team (2014) nlme: linear and nonlinear mixed effects models. R package version 3.1-117. https://CRAN.R-project.org/package=nlme.
  68. Plante S, Champagne E, Ropars P, Boudreau S, Levesque E, Tremblay B, Tremblay J-P (2014) Shrub cover in northern Nunavik: can herbivores limit shrub expansion? Polar Biol 37:611–619CrossRefGoogle Scholar
  69. Post E, Boving PS, Pedersen C, MacArthur MA (2003) Synchrony between caribou calving and plant phenology in depredated and non-depredated populations. Can J Zool 81:1709–1714CrossRefGoogle Scholar
  70. Post E, Forchhammer MC (2008) Climate change reduces reproductive success of an Arctic herbivore through trophic mismatch. Philos Trans R Society Lond B Biol Sci 363:2369–2375CrossRefGoogle Scholar
  71. Post E, Pedersen C (2008) Opposing plant community responses to warming with and without herbivores. Proc Natl Acad Sci USA 105:12353–12358CrossRefGoogle Scholar
  72. Pouliot D, Latifovic R, Olthof I (2009) Trends in vegetation NDVI from 1km AVHRR data over Canada for the period 1985–2006. Int J Remote Sens 30:149–168CrossRefGoogle Scholar
  73. R Core Team (2014) R: a language and environment for statistical computing. R foundation for statistical computing, Vienna.http://www.R-project.org/
  74. Rickbeil GJM, Coops NC, Adamczewski J (2015) The grazing impacts of four barren ground caribou herds (Rangifer tarandus groenlandicus) on their summer ranges: an application of archived remotely sensed vegetation productivity data. Remote Sens Environ 164:314–323CrossRefGoogle Scholar
  75. Ropars P, Boudreau S (2012) Shrub expansion at the forest-tundra ecotone: spatial heterogeneity linked to local topography. Environ Res Lett 7:015501CrossRefGoogle Scholar
  76. Russell DE, Martell AM, Nixon WAC (1993) Range ecology of the Porcupine caribou herd in Canada. Rangifer 13:1–168CrossRefGoogle Scholar
  77. Skogland T (1986) Density dependent food limitation and maximal production in wild reindeer herds. J Wildl Manag 50:314–319CrossRefGoogle Scholar
  78. Stow DA, Hope A, McGuire D, Verbyla D, Gamon J, Huemmrich F, Houston S, Racine C, Sturm M, Tape K, Hinzman L, Yoshikawa K, Tweedie C, Noyle B, Silapaswan C, Douglas D, Griffith B, Jia G, Epstein H, Walker D, Daeschner S, Petersen A, Zhou LM, Myneni R (2004) Remote sensing of vegetation and land-cover change in Arctic tundra ecosystems. Remote Sens Environ 89:281–308CrossRefGoogle Scholar
  79. Sturm M, Racine C, Tape K (2001) Climate change—increasing shrub abundance in the Arctic. Nature 411:546–547CrossRefGoogle Scholar
  80. Taillon J, Festa-Bianchet M, Côté SD (2012) Shifting targets in the tundra: protection of migratory caribou calving grounds must account for spatial changes over time. Biol Conserv 147:163–173CrossRefGoogle Scholar
  81. te Beest M, Sitters J, Ménard CB, Olofsson J (2016) Reindeer grazing increases summer albedo by reducing shrub abundance in Arctic tundra. Environ Res Lett 11:125013CrossRefGoogle Scholar
  82. Théau J, Duguay CR (2004) Mapping lichen changes in the summer range of the George River Caribou Herd (Québec-Labrador, Canada) using Landsat imagery (1976–1998). Rangifer 24:31–50CrossRefGoogle Scholar
  83. Thompson DP, Barboza PS (2014) Nutritional implications of increased shrub cover for caribou (Rangifer tarandus) in the Arctic. Can J Zool 92:339–351CrossRefGoogle Scholar
  84. Toupin B, Huot J, Manseau M (1996) Effect of insect harassment on the behaviour of the Riviere George Caribou. Arctic 49:375–382CrossRefGoogle Scholar
  85. Tremblay B, Levesque E, Boudreau S (2012) Recent expansion of erect shrubs in the Low Arctic: evidence from Eastern Nunavik. Environ Res Lett 7:035501CrossRefGoogle Scholar
  86. Trudell J, White RG (1981) The effect of forage structure and availability on food intake, biting rate, bite size and daily eating time of reindeer. J Appl Ecol 18:63–81CrossRefGoogle Scholar
  87. Tyler NJC (2010) Climate, snow, ice, crashes, and declines in populations of reindeer and caribou (Rangifer tarandus L.). Ecol Monogr 80:197–219CrossRefGoogle Scholar
  88. Van der Wal R (2006) Do herbivores cause habitat degradation or vegetation state transition? Evidence from the tundra. Oikos 114:177–186CrossRefGoogle Scholar
  89. 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 123:108–115CrossRefGoogle Scholar
  90. Vors LS, Boyce MS (2009) Global declines of caribou and reindeer. Glob Change Biol 15:2626–2633CrossRefGoogle Scholar
  91. Walsh NE, McCabe TR, Welker JM, Parsons AN (1997) Experimental manipulations of snow-depth: effects on nutrient content of caribou forage. Glob Change Biol 3:158–164CrossRefGoogle Scholar
  92. Wang LX, Xiao PF, Feng XZ, Li HX, Zhang WB, Lin JT (2014) Effective compositing method to produce cloud-free AVHRR image. IEEE Geosci Remote Sens Lett 11:328–332CrossRefGoogle Scholar
  93. Wiken EB (1986) Terrestrial EcoZones of Canada. Ecological Land Classification Series No 19. Lands Directorate, Environment Canada.Google Scholar
  94. Zamin TJ, Grogan P (2013) Caribou exclusion during a population low increases deciduous and evergreen shrub species biomass and nitrogen pools in low Arctic tundra. J Ecol 101:671–683CrossRefGoogle Scholar

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Authors and Affiliations

  1. 1.Caribou Ungava, Département de BiologieUniversité Laval, QuébecQuébecCanada
  2. 2.Department of Forest Resources Management, Integrated Remote Sensing StudioUniversity of British ColumbiaVancouverCanada

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