Assessing the Impacts of Summer Range on Bathurst Caribou’s Productivity and Abundance since 1985

Wenjun Chen, Lori White, Jan Z. Adamczewski, Bruno Croft, Kerri Garner, Jody S. Pellissey, Karin Clark, Ian Olthof, Rasim Latifovic, Greg L. Finstad

Canada Centre for Remote Sensing, Natural Resources Canada, Ottawa, Canada.
Environment and Natural Resources, Government of the Northwest Territories, Yellowknife, Canada.
School of Natural Resources and Agricultural Sciences, University of Alaska, Fairbanks, USA.
Tlicho Government, Behchoko, Canada.
Wek'èezhìi Renewable Resources Board, Yellowknife, Canada.

DOI: 10.4236/nr.2014.54014                

Abstract

Barren ground caribou are one of the most important natural resources for northern aboriginal peoples in Canada, and their responsible management has been identified as a top priority by northern communities and governments. This study is aimed to assess the impacts of summer range forage availability and quality on Bathurst caribou’s productivity and abundance. Despite well documented effects of habitat nutrition on individual animal, few studies have been able to link nutrition and population demographics in a quantitative fashion, probably because caribou productivity and abundance could be potentially affected by many factors (e.g., habitat, harvest, predators, diseases/parasites, extreme weather, climate change, industrial development, and pollution), and yet long-term data for many of these factors are not available. By determining the upper envelope curve between summer range indicators and caribou productivity, this study made such assessment possible. Our results indicate that summer range indicators derived from long-term remote sensing time series and climate records can explain 59% of the variation in late-winter calf:cow ratio during 1985 and 2012. As a measure of caribounet productvitiy, the late-winter calf:cow ratio, together with the mortality rate, in turn determined population dynamics.

Keywords

Barren Ground Caribou; Late-Winter Calf:Cow Ratio; Summer Range; Leaf Biomass; Phenology; Remote Sensing

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Boulanger, J., Gunn, A., Adamczewski, J. and Croft, B. (2011) A Data-Driven Model to Explore the Decline of the Bathurst Caribou Herd. Journal of Wildlife Management, 75, 883-896. http://dx.doi.org/10.1002/jwmg.108
[2]	Klein, D.R., et al. (2005) Management and Conservation of Wildlife in a Changing Arctic Environment. In: Symon, C., Arris, L. and Heal, B., Eds., Arctic Climate Impact Assessment, Cambridge University Press, New York, 597-644.
[3]	GNWT (2011) Caribou Forever—Our Heritage, Our Responsibility: A Barren-Ground Caribou Management Strategy for the Northwest Territories 2011-2015. Environment and Natural Resources, GNWT, Yellowknife.
[4]	Russell, D.E., van de Wetering, D., White, R.G. and Gerhart, K.L. (1996) Oil and the Porcupine Caribou Herd—Can We Quantify the Impacts? Rangifer, 9, 255-257.
[5]	Bergerud, A.T., Luttich, S.N. and Camps, L. (2008) The Return of Caribou to Ungava. McGill-Quenns’s University Press, Montreal.
[6]	Smit, B. and Spaling, H. (1995) Methods for Cumulative Effects Assessment. Environmental Impact Assessment Review, 15, 81-106. http://dx.doi.org/10.1016/0195-9255(94)00027-X
[7]	Williams, M.T. and Fournier, B. (1996) Summary of Spring Classification Surveys of the Bathurst Caribou Herd 1985-1995. Department of Resources, Wildlife and Economic Development, GNWT, Yellowknife, Report No. 92.
[8]	Griffith, B., et al. (2001) Bathurst Caribou Calving Ground Studies: Influence of Nutrition and Human Activity on Calving Ground Location. Final Report Submitted to West Kitikmeot Slave Study Society, Yellowknife.
[9]	Chen, W., et al. (2013) Monitoring Habitat Condition Changes during Winter and Pre-Calving Migration for Bathurst Caribou in Northern Canada. Biodiversity, 14, 36-44. http://dx.doi.org/10.1080/14888386.2012.705110
[10]	Gunn, A., D’Hont, A., Williams, J. and Boulanger, J. (2013) Satellite-Collaring in the Bathurst Herd of Barren-Ground Caribou 1996-2005. Department of Environment and Natural Resources Yellowknife, Manuscript Report No. 223.
[11]	Gunn, A., Boulanger, J. and Williams, J. (2005) Calf Survival and Adult Sex Ratio in the Bathurst Herd of Barren Ground Caribou 2001-2004. Environment and Natural Resources, GNWT, Yellowknife, Manuscript Report No. 163.
[12]	Gunn, A., Nishi, J., Boulanger, J. and Williams, J. (2005) An Estimate of Breeding Females in the Bathurst Herd of the Barren-Ground Caribou, June 2003. Environment and Natural Resources, GNWT, Yellowknife.
[13]	Latifovic, R., Cihlar, J. and Chen, J. (2003) Comparison of BRDF Models for the Normalization of Satellite Optical Data to a Standard Sun-Target-Sensor Geometry. IEEE Transactions on Geoscience and Remote Sensing, 41, 8891898. http://dx.doi.org/10.1109/TGRS.2003.811557
[14]	Khlopenkov, K. and Trishchenko, A. (2006) SPARC: New Cloud, Clear-Snow/Ice and Cloud Shadow Detection Scheme for Historical AVHHR 1-km Observations over Canada. Journal of Atmospheric and Oceanic Technology, 24, 322-343. http://dx.doi.org/10.1175/JTECH1987.1
[15]	Latifovic, R., et al. (2005) Generating Historical AVHRR 1 km Baseline Satellite Data Records over Canada Suitable for Climate Change Studies. Canadian Journal of Remote Sensing, 31, 324-346. http://dx.doi.org/10.5589/m05-024
[16]	Latifovic, R., Pouliot, D. and Dillabaugh, C. (2012) Identification and Correction of Systematic Error in NOAA AVHRR Long-Term Satellite Data Record.Remote Sensing of Environment, 127, 84-97. http://dx.doi.org/10.1016/j.rse.2012.08.032
[17]	Olthof, I. and Fraser, R.H. (2007) Mapping Northern Land Cover Fractions Using Landsat ETM+. Remote Sensing of Environment, 107, 496-509. http://dx.doi.org/10.1016/j.rse.2006.10.009
[18]	Chen, W., et al. (2013) Evaluating and Reducing Errors in Seasonal Profiles of AVHRR Vegetation Indices over a Canadian Northern National Park Using Cloudiness Index. International Journal of Remote Sensing, 34, 4320-4343. http://dx.doi.org/10.1080/01431161.2013.775536
[19]	Chen, W., et al. (2009) Relating Biomass and Leaf Area Index to Non-Destructive Measurements for Monitoring Changes in Arctic Vegetation. Arctic, 62, 281-294. http://dx.doi.org/10.14430/arctic148
[20]	Chen, Z., Chen, W., Leblanc, S.G. and Henry, G. (2010) Digital Photograph Analysis for Measuring Percent Plant cover in the Arctic. Arctic, 63, 315-326. http://dx.doi.org/10.14430/arctic1495
[21]	Chen, W., et al. (2013) Propagation of Errors Associated with Scaling Foliage Biomass from Field Measurements to Remote Sensing Data over a Canada’s Northern National Park. Remote Sensing of Environment, 130, 205-218. http://dx.doi.org/10.1016/j.rse.2012.11.012
[22]	Tucker, C.J. (1979) Red and Photographic Infrared Linear Combinations for Monitoring Vegetation. Remote Sensing Environment, 8, 127-150. http://dx.doi.org/10.1016/0034-4257(79)90013-0
[23]	Pouliot, D., Latifovic, R., Fernandes, R. and Olthof, I. (2011) Evaluation of Compositing Period and AVHRR and MERIS Combination for Improvement of Spring Phenology Detection in Deciduous Forests. Remote Sensing Environment, 115, 158-66. http://dx.doi.org/10.1016/j.rse.2010.08.014
[24]	White, M.A., et al. (2009) Intercomparison, Interpretation, and Assessment of Spring Phenology in North America Estimated from Remote Sensing for 1982-2006.Global Change Biology, 15, 2335-2359. http://dx.doi.org/10.1111/j.1365-2486.2009.01910.x
[25]	Taylor, J.R. (1997) An Introduction to Error Analysis, the Study of Uncertainties in Physical Measurements. University Science Books, Sausalito.
[26]	Fernandes, R., Latifovic, R. and Chilar, J. (2005) Regional Monitoring of Snow cover and Phenology Using Polar Orbiting Satellites. In: Veroustrate, F., Bartholome, E. and Verstraten, W., Eds., Proceedings of the Second International Vegetation User Conference, Antwerp, Belgium, 211-218.
[27]	Peltoniemi, J.I., Suomalainen, J., Puttonen, E., Naranen, J. and Rautiainen, M. (2008) Reflectance Properties of Selected Arctic-Boreal Land Cover Types: Field Measurements and Their Application in Remote Sensing. Biogeosciences Discuss, 5, 1069-1095. http://dx.doi.org/10.5194/bgd-5-1069-2008
[28]	Vierling, L.A., Deering, D.W. and Eck, T.F. (1997) Differences in Arctic Tundra Vegetation Type and Phenology as Seen Using Bidirectional Radiometry in the Early Growing Season. Remote Sensing Environment, 60, 71-82. http://dx.doi.org/10.1016/S0034-4257(96)00139-3
[29]	Lobell, D.B. and Asner, G.P. (2002) Moisture Effects on Soil Reflectance. Soil Science Society of America Journal, 66, 722-727. http://dx.doi.org/10.2136/sssaj2002.0722
[30]	Fensholt, R. and Sandholt, I. (2005) Evaluation of MODIS and NOAA AVHRR Vegetation Indices with in Situ Measurements in a Semi-Arid Environment. International Journal of Remote Sensing, 26, 2561-2594. http://dx.doi.org/10.1080/01431160500033724
[31]	White, R.G. (1983) Foraging Patterns and Their Multiplier Effects of Productivity of Northern Ungulates. Oikos, 40, 377-384. http://dx.doi.org/10.2307/3544310
[32]	Finstad, G.L. (2008) Applied Range Ecology of Reindeer (Rangifer tarandus tarandus) on the Seward Peninsula, Alaska. Ph.D. Thesis, University of Alaska, Fairbanks.
[33]	McArt, S.H., Spalinger, D.E., Collins, W.B., Schoen, E.R., Stevenson, T. and Bucho, M. (2009) Summer Dietary Nitrogen Availability as a Potential Bottom-Up Constraint on Moose in South-Central Alaska. Ecology, 90, 1400-1411. http://dx.doi.org/10.1890/08-1435.1
[34]	Johnstone, J., Russell, D.E. and Griffith, B. (2002) Variation in Plant Forage Quality in the Range of the Porcupine Caribou Herd. Rangifer, 22, 83-91. http://dx.doi.org/10.7557/2.22.1.693
[35]	van Heerwaarden, L.M., Toet, S. and Aerts, R. (2003) Nitrogen and Phosphorus Resorption Efficiency and Proficiency in Six Sub-Arctic Bog Species after 4 Years of Nitrogen Fertilization. Journal of Ecology, 91, 1060-1070. http://dx.doi.org/10.1046/j.1365-2745.2003.00828.x
[36]	Chen, W., Chen, J.M. and Cihlar, J. (2000) An Integrated Terrestrial Carbon-Budget Model Based on Changes in Disturbance, Climate, and Atmospheric Chemistry. Ecological Modelling, 135, 55-79. http://dx.doi.org/10.1016/S0304-3800(00)00371-9
[37]	Stroppiana, D., Boschetti, M., Brivio, P.A., Carrara, P. and Bordogna, G. (2009) A Fuzzy Anomaly Indicator for Environmental Monitoring at Continental Scale. Ecological Indicators, 9, 92-106. http://dx.doi.org/10.1016/j.ecolind.2008.02.002
[38]	Sundareshwar, P.V., Morris, J.T., Koepfler, E.K. and Fornwalt, B. (2003) Phosphorus Limitation of Coastal Ecosystem Processes. Science, 299, 563-565. http://dx.doi.org/10.1126/science.1079100
[39]	Falge, E., Graber, W., Siegwolf, R. and Tenhunen, J.D. (1996) A Model of the Gas Exchange Response of Picea abies to Habitat Conditions. Trees, 10, 277-287.
[40]	Peek, M.S., Russek-Cohen, E., Wait, D.A. and Forseth, I.N. (2002) Physiological Response Curve Analysis Using Nonlinear Mixed Models. Oecologia, 132, 175-180. http://dx.doi.org/10.1007/s00442-002-0954-0
[41]	Bissinger, J.E., Montagnes, D.J.S., Sharples, J. and Atkinson, D. (2008) Predicting Marine Phytoplankton Maximum Growth Rates from Temperature: Improving on the Eppley Curve Using Quantile Regression. Limnology and Oceanography, 53, 487-493. http://dx.doi.org/10.4319/lo.2008.53.2.0487
[42]	Chan-McLeod, A.C.A., White, R.G. and Holleman, D.F. (1994) Effects of Protein and Energy Intake, Body Condition, and Season on Nutrient Partitioning and Milk Production in Caribou and Reindeer. Canadian Journal of Zoology, 72, 938-947. http://dx.doi.org/10.1139/z94-127
[43]	Barboza, P.S., Parker, K.L. and Hume, I.D. (2009) Integrative Wildlife Nutrition. Springer-Verlag, Berlin and Heidelberg. http://dx.doi.org/10.1007/978-3-540-87885-8
[44]	Klein, D.R. (1970) Tundra Ranges North of the Boreal Forest. Journal of Range Management, 23, 8-14. http://dx.doi.org/10.2307/3896000
[45]	Taillon, J., Barboza, P. and Coté, S.D. (2013) Nitrogen Allocation to Offspring and Milk Production in a Capital Breeder. Ecology, 94, 1815-1827. http://dx.doi.org/10.1890/12-1424.1