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Biocomplexity Library

Journal Articles - Data Reports - Field Reports - Posters - Talks - Field Season '03 Talks

Biocomplexity of Arctic Tundra Ecosystems - AGU Journal of Geophysical Research Special Collection

  1. 2008

    1. Daanen, R.P., Misra, D., Epstein, H., Walker, D., Romanovsky, V. 2008. Simulating nonsorted circle development in arctic tundra ecosystems. Journal of Geophysical Research - Biogeosciences. 113:1-10. PDF - Permanent link. doi: 10.1029/2008JG000682.
    2. Epstein, H.E., Walker, D.A., Raynolds, M.K., Jia, G.J., Kelley, A.M. 2008. Phytomass patterns across a temperature gradient of the North American arctic tundra. Journal of Geophysical Research - Biogeosciences. 113:1-11. PDF - Permanent link
    3. Michaelson, G.J., Ping, C.L., Epstein, H., Kimble, J.M., Walker, D.A. 2008. Soils and frost boil ecosystems across the North American Arctic Transect. Journal of Geophysical Research - Biogeosciences. 113:G03S11, 10.1029/2007JG000672. PDF - Abstract. doi: 10.1029/2007JG000672.
    4. Nicolsky, D.J., Romanovsky, V.E., Tipenko, G.S., Walker, D.A. 2008. Modeling biogeophysical interactions in nonsorted circles in the Low Arctic. Journal of Geophysical Research - Biogeosciences. 113:1-17. PDF - Abstract. doi: 10.1029/2007JG000565.
    5. Peterson, R.A., Krantz, W.B.a. 2008. Differential frost heave model for patterned ground formation: Corroboration with observations along a North American Arctic Transect. Journal of Geophysical Research - Biogeosciences. 113:G03S04, 1-17. PDF - Abstract. doi: 10.1029/2007JG000559.
    6. Ping, C.-L., Michaelson, G.J., Kimble, J.M., Romanovsky, V.E., Shur, Y.L., Swanson, D.K., Walker, D.A. 2008. Cryogenesis and soil formation along a bioclimate gradient in Arctic North America. Journal of Geophysical Research - Biogeosciences. 113:G03S12. PDF - Permanent link. doi: 10.1029/2008JG000744.
    7. Raynolds, M.K., Walker, D.A., Munger, C.A., Vonlanthen, C.M., Kade, A.N. 2008. A map analysis of patterned-ground along a North American Arctic Transect. Journal of Geophysical Research - Biogeosciences. 113:1-18. PDF - Abstract. doi: 10.1029/2007JG000512.
    8. Walker, D.A., Epstein, H.E., Romanovsky, V.E., Ping, C.L., Michaelson, G.J., Daanen, R.P., Shur, Y., Peterson, R.A., Krantz, W.B., Raynolds, M.K., Gould, W.A., Gonzalez, G., Nicolsky, D.J., Vonlanthen, C.M., Kade, A.N., Kuss, P., Kelley, A.M., Munger, C.A., Tarnocai, C.T., Matveyeva, N.V., Daniëls, F.J.A. 2008. Arctic patterned-ground ecosystems: A synthesis of field studies and models along a North American Arctic Transect. Journal of Geophysical Research - Biogeosciences. 113:G03S01. PDF. doi: 10.1029/2007JG000504.
    9. Walker, D.A., Epstein, H.E., Welker, J.M. 2008. Introduction to special section on Biocomplexity of Arctic Tundra Ecosystems. Journal of Geophysical Research - Biogeosciences. 113:G03S00. PDF - Permanent link. doi: 10.1029/2008JG000740.

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Journal Articles

  1. 2012

    1. Kelley, A.M., Epstein, H.E., Ping, C.-L., Walker, D.A. 2012. Soil nitrogen transformations associated with small patterned-ground features along a North American Arctic Transect. Permafrost and Periglacial Processes. 23:196-206. PDF
    2. Walker, D.A., Epstein, H.E., Raynolds, M.K., Kuss, P., Kopecky, M.A., Frost, G.V., Daniëls, F.J.A., Leibman, M.O., Moskalenko, N.G., Matyshak, G.V., Khitun, O.V., Khomutov, A.V., Forbes, B.C., Bhatt, U.S., Kade, A.N., Vonlanthen, C.M., Tichy, L. 2012. Environment, vegetation and greenness (NDVI) along the North America and Eurasia Arctic transects. Environmental Research Letters. 7(1). PDF - Environmental Research Letters. doi: 10.1088/1748-9326/7/1/015504.

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  1. 2011

    1. Walker, D.A. 2011. Biocomplexity of small patterned-ground features. Arctic Ecology Course. Masaryk University, Brno, Czech Republic March 8. PDF, PPT
    2. Walker, D.A., Kuss, H.P., Epstein, H.E., Kade, A.N., Vonlanthen, C., Raynolds, M.K., Daniëls, F.J.A. 2011. Vegetation of zonal patterned-ground ecosystems along the North American Arctic Transect. Applied Vegetation Science. 14:440-463. PDF

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  1. 2010

    1. Gould, W.A., Gonzalez, G., Walker, D.A., Ping, C.L. 2010. Commentary. Integrating research, education, and traditional knowledge in ecology: a case study of biocomplexity in Arctic ecosystems. Arctic, Antarctic, and Alpine Research. 42:(4):379-384. PDF

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  1. 2009

    1. Jia, G.J., Epstein, H.E., Walker, D.A. 2009. Vegetation greening in the Canadian Arctic related to decadal warming. Journal of Environmental Monitoring. 11:2231-2238. - Purchase PDF. doi: 10.1039/B911677J.
    2. Kelley, A.M., Epstein, H.E. 2009. Effects of nitrogen fertilization on plant communities of nonsorted circles in moist nonacidic tundra, Northern Alaska. Arctic, Antarctic, and Alpine Research. 41(1):119-127. PDF - BioOne online article. doi: 10.1657/1523-0430-41.1.119.
    3. Walker, D.A., Hamilton, T.D., Ping, C.-L., Daanen, R.P., Streever, W.W. 2009. Dalton Highway Field Trip Guide for the Ninth International Conference on Permafrost. Division of Geological and Geophysical Surveys. Fairbanks, AK. 9. 117 . PDF. Print copy

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  1. 2008

    1. Daanen, R., Romanovsky, V., Walker, D., LaDouceur, M. 2008. High resolution, surface and subsurface survey of a non-sorted circle system. Ninth International Conference on Permafrost. Fairbanks, AK, June 29 - July 3. 321-326. PDF
    2. Daanen, R.P., Misra, D., Epstein, H., Walker, D., Romanovsky, V. 2008. Simulating nonsorted circle development in arctic tundra ecosystems. Journal of Geophysical Research - Biogeosciences. 113:1-10. PDF - Permanent link. doi: 10.1029/2008JG000682.
    3. Epstein, H.E., Walker, D.A., Raynolds, M.K., Jia, G.J., Kelley, A.M. 2008. Phytomass patterns across a temperature gradient of the North American arctic tundra. Journal of Geophysical Research - Biogeosciences. 113:1-11. PDF - Permanent link
    4. Kade, A., Walker, D.A. 2008. Experimental alteration of vegetation on nonsorted circles: effects on cryogenic activity and implications for climate change in the Arctic. Arctic, Antarctic, and Alpine Research. 40(1):96-103. PDF - Abstract. doi: 10.1657/1523-0430(06-029)[KADE]2.0.CO;2.
    5. Michaelson, G.J., Ping, C.L., Epstein, H., Kimble, J.M., Walker, D.A. 2008. Soils and frost boil ecosystems across the North American Arctic Transect. Journal of Geophysical Research - Biogeosciences. 113:G03S11, 10.1029/2007JG000672. PDF - Abstract. doi: 10.1029/2007JG000672.
    6. Nicolsky, D.J., Romanovsky, V.E., Tipenko, G.S., Walker, D.A. 2008. Modeling biogeophysical interactions in nonsorted circles in the Low Arctic. Journal of Geophysical Research - Biogeosciences. 113:1-17. PDF - Abstract. doi: 10.1029/2007JG000565.
    7. Nicolsky, D.J., Romanovsky, V.E., Tipenko, G.S., Walker, D.A. 2008. Modeling observed differential frost heave within non-sorted circles in Alaska. Ninth International Conference on Permafrost. Fairbanks, AK, June 29-July 3. 1281-1286.
    8. Peterson, R.A. 2008. Numerical modeling of differential frost heave. Ninth International Conference on Permafrost. Fairbanks, AK, June 29-July 3. 1399-1404.
    9. Peterson, R.A., Krantz, W.B.a. 2008. Differential frost heave model for patterned ground formation: Corroboration with observations along a North American Arctic Transect. Journal of Geophysical Research - Biogeosciences. 113:G03S04, 1-17. PDF - Abstract. doi: 10.1029/2007JG000559.
    10. Ping, C.-L., Michaelson, G.J., Jorgenson, M.T., Kimble, J.M., Epstein, H., Romanovsky, V.E., Walker, D.A. 2008. High stocks of soil organic carbon in North American Arctic region. Nature Geoscience. 1:615-619. PDF - Abstract. doi: 10.1038/ngeo284.
    11. Ping, C.-L., Michaelson, G.J., Kimble, J.M., Romanovsky, V.E., Shur, Y.L., Swanson, D.K., Walker, D.A. 2008. Cryogenesis and soil formation along a bioclimate gradient in Arctic North America. Journal of Geophysical Research - Biogeosciences. 113:G03S12. PDF - Permanent link. doi: 10.1029/2008JG000744.
    12. Raynolds, M.K., Comiso, J.C., Walker, D.A., Verbyla, D. 2008. Relationship between satellite-derived land surface temperatures, arctic vegetation types, and NDVI. Remote Sensing of Environment. 112(4):1884-1894. PDF - Permanent link. doi: 10.1016/j.rse.2007.09.008.
    13. Raynolds, M.K., Walker, D.A., Munger, C.A., Vonlanthen, C.M., Kade, A.N. 2008. A map analysis of patterned-ground along a North American Arctic Transect. Journal of Geophysical Research - Biogeosciences. 113:1-18. PDF - Abstract. doi: 10.1029/2007JG000512.
    14. Vonlanthen, C.M., Walker, D.A., Raynolds, M.K., Kade, A., Kuss, H.P., Daniëls, F.J.A., Matveyeva, N.V. 2008. Patterned-ground plant communities along a bioclimate gradient in the High Arctic, Canada. Phytocoenologia. 38:23-63. PDF - Abstract. doi: 10.1127/0340-269X/2008/0038-0023.
    15. Walker, D.A., Epstein, H.E., Romanovsky, V.E., Ping, C.L., Michaelson, G.J., Daanen, R.P., Shur, Y., Peterson, R.A., Krantz, W.B., Raynolds, M.K., Gould, W.A., Gonzalez, G., Nicolsky, D.J., Vonlanthen, C.M., Kade, A.N., Kuss, P., Kelley, A.M., Munger, C.A., Tarnocai, C.T., Matveyeva, N.V., Daniëls, F.J.A. 2008. Arctic patterned-ground ecosystems: A synthesis of field studies and models along a North American Arctic Transect. Journal of Geophysical Research - Biogeosciences. 113:G03S01. PDF. doi: 10.1029/2007JG000504.
    16. Walker, D.A., Epstein, H.E., Welker, J.M. 2008. Introduction to special section on Biocomplexity of Arctic Tundra Ecosystems. Journal of Geophysical Research - Biogeosciences. 113:G03S00. PDF - Permanent link. doi: 10.1029/2008JG000740.
    17. Walker, D.A., Raynolds, M.K., Gould, W.A. 2008. Fred Daniëls, Subzone A, and the North American Arctic Transect. Abhandlungen aus dem Westfälischen Museum für Naturkunde. 70:(3/4):387-400. PDF

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  1. 2007

    1. Daanen, R., Misra, D., Epstein, H.E. 2007. Active-layer hydrology in nonsorted circle ecosystems of the arctic tundra. Vadose Zone Journal. 6(4):694-704.
    2. Daanen, R.P., Misra, D., Epstein, H.E. 2007. Active-layer hydrology in non-sorted circle ecosystems of the Arctic tundra. Vadose Zone Journal. 6:694-704. PDF - Permanent link

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  1. 2006

    1. Kade, A. 2006. Biocomplexity of nonsorted circles in the Low Arctic, Alaska. Thesis, University of Alaska Fairbanks. 245.
    2. Kade, A., Romanovsky, V.E., Walker, D.A. 2006. The N-factor of nonsorted circles along a climate gradient in Arctic Alaska. Permafrost and Periglacial Processes. 17(4):279-289. PDF. doi: 10.1002/ppp.563.
    3. Zhurbenko, M.P., Matveeva, N.V., Vonlanthen, C., Walker, D.A., Raynolds, M.K. 2006. Lichens from Ellef Ringnes Island, Canadian Arctic Archipelago. Evansia. 23:(3):69-78. PDF

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  1. 2005

    1. Afonina, O.M., Raynolds, M.K., Walker, D.A. 2005. On the moss flora of Mould Bay (Prince Patrick Island, Canadian Arctic Archipelago). Arctoa. 14:135-142. PDF
    2. Kade, A., Walker, D.A., Raynolds, M.K. 2005. Plant communities and soils in cryoturbated tundra along a bioclimate gradient in the Low Arctic, Alaska. Phytocoenologia. 35:(4):761-820. PDF - Abstract
    3. Misra, D., Daanen, R. 2005. Visualizing Frost Boils. Challenges - in science and engineering. 13:(1):18-19, 23. PDF
    4. Ping, C.-L., Michaelson, G.J., Kimble, J.M., Walker, D.A. 2005. Soil acidity and exchange properties of cryogenic soils in Arctic Alaska. Journal of Soil Science and Plant Nutrition. 51(5):649-653. PDF - Abstract. doi: 10.1111/j.1747-0765.2005.tb00083.x.
    5. Zhurbenko, M.P., Laursen, G.A., Walker, D.A. 2005. New and rare lichenicolous fungi and lichens from the North American Arctic. Mycotaxon. 92:201-212. PDF - Abstract
    6. Zhurbenko, M.P., Raynolds, M.K., Walker, D.A., Matveeva, N.V. 2005. Lichens and lichenicolous fungi from the Kolyma delta region, Russian Arctic. Graphis Scripta. 17:27-29. PDF

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  1. 2004

    1. Epstein, H.E., Beringer, J., Copass, C., Gould, W., Lloyd, A., Chapin III, F.S., Ping, C.L., Michaelson, G., Rupp, S., Walker, D.A. 2004. The nature of spatial transitions in arctic ecosytems. Journal of Biogeography. 31:1917-1933. PDF - Abstract. doi: 10.1111/j.1365-2699.2004.01140.x.
    2. Kelley, A.M., Epstein, H., Walker, D.A. 2004. Role of vegetation and climate in permafrost active layer depth in arctic tundra of Northern Alaska and Canada. Journal of Glaciology and Climatology. 26:269-273. PDF
    3. Ping, C.L., Jorgensen, T., Shur, Y. 2004. Soil cryogenic structures and their implications for land use in Alaska. Journal of Glaciology and Geocryology. 26:(z1).
    4. Ping, C.L., Swanson, D.K., Clark, M.H. 2004. Cryosols in Alaska. in J. M. Kimble (eds.) Permafrost-affected soils. Springer-Verlag. Heidelberg. pp. 727. PDF
    5. Walker, D.A., Epstein, H.E., Gould, W.A., Kelley, A.M., Kade, A.N., Knudson, J.A., Krantz, W.B., Michaleson, G., Peterson, R.A., Ping, C.L., Raynolds, M.K., Romanovsky, V.E., Shur, Y.L. 2004. Frost-boil ecosystems: complex interactions between landforms, soils, vegetation, and climate. Permafrost and Periglacial Processes. 15(2):171-188. PDF - Abstract. doi: 10.1002/ppp.487.

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  1. 2003

    1. Gould, W.A., Walker, D.A., Biesboer, D. 2003. Combining research and education: Bioclimatic Zonation along a Canadian Arctic Transect. Arctic. 56:(1):45-54. PDF - Abstract
    2. Jia, G.J., Epstein, H.E., Walker, D.A. 2003. Greening of arctic Alaska, 1981-2001. Geophysical Research Letters. 30(20):1-4. PDF - Abstract. doi: 10.1029/2003GL018268.
    3. Peterson, R.A., Krantz, W.B. 2003. A mechanism for differential frost heave and its implications for patterned ground formation. Journal of Glaciology. 49:(164):69-80. PDF - Abstract
    4. Ping, C.-L., Michaelson, G.J., Overduin, P.P., Stiles, C.A. 2003. Morphogenesis of frost boils in the Galbraith Lake area, arctic Alaska. Permafrost: Proceedings of the Eighth International Conference on Permafrost. Zurich, Switzerland, 21-25 July, 2003. 2:897-900.
    5. Walker, D.A., Epstein, H.E., Jia, J.G., Balser, A.W., Copass, C., Edwards, E.J., Gould, W.A., Hollingsworth, J., Knudson, J., Maier, H.A., Moody, A., Raynolds, M.K. 2003. Phytomass, LAI, and NDVI in northern Alaska: Relationships to summer warmth, soil pH, plant functional types, and extrapolation to the circumpolar Arctic. Journal of Geophysical Research - Atmospheres. 108(d2):8169. PDF - Abstract. doi: 10.1029/2001JD000986.
    6. Walker, D.A., Jia, G.J., Epstein, H.E., Raynolds, M.K., Chapin , F.S., III, Copass, C.D., Hinzman, L.D., Knudson, J.A., Maier, H.A., Michaelson, G.J., Nelson, F., Ping, C.L., Romanovsky, V.E., Shiklomanov, N. 2003. Vegetation-soil-thaw-depth relationships along a low-arctic bioclimate gradient, Alaska: synthesis of information from the ATLAS studies. Permafrost and Periglacial Processes. 14(2):103-123. PDF - Abstract. doi: 10.1002/ppp.452.

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  1. 2002

    1. Jia, G.J., Epstein, H.E., Walker, D.A. 2002. Spatial characteristics of AVHRR-NDVI along latitudinal transects in northern Alaska. Journal of Vegetation Science. 13:(3):315-326. PDF - Jstor link

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Data Reports

  1. 2008

    1. Walker, D.A. 2008. Biocomplexity associated with biogeochemical cycles in arctic frost-boil ecosystems. AGC Final Report. . 77. PDF

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  1. 2006

    1. Barreda, J.E., Knudson, J.A., Walker, D.A., Raynolds, M.K., Kade, A.N., Munger, C.A. 2006. Biocomplexity of Patterned Ground Data Report, Dalton Highway, 2001-2005. AGC Data Report. . 252. PDF
    2. Vonlanthen, C.M., Raynolds, M.K., Munger, C.A., Kade, A.N., Walker, D.A. 2006. Biocomplexity of Patterned Ground Isachsen Expedition, July 2005. AGC Data Report. . 86. PDF

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  1. 2005

    1. Munger, C.A., Raynolds, M.K., Kade, A.N., Walker, D.A. 2005. Biocomplexity of Patterned Ground: Mould Bay Expedition. AGC Data Report. . 62. PDF
    2. Raynolds, M.K. 2005. Addendum to the 2003 Green Cabin, Banks Island Data Report. AGC Data Report. . 39. PDF
    3. Walker, D.A. 2005. Biocomplexity of Small Patterned-Ground Ecosystems in the Arctic. AGC Data Report. . 26. PDF

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  1. 2004

    1. Munger, C.A., Raynolds, M.K., Walker, D.A. 2004. July 2003 Banks Island Expedition: Vegetation, biomass, NDVI, soil, thaw layer, invertebrates, decomposition, biogeochemistry and turf-hummock studies. AGC Data Report. . 72. PDF
    2. Raynolds, M.K., Walker, D.A., Martin, C.R. 2004. Biocomplexity of Frost-Boil Ecosystems: Snow Data Report. AGC Data Report. . 32. PDF

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  1. 2003

    1. Raynolds, M.K., Walker, D.A. 2003. Banks Island July 2003 Field Report. AGC Field Report. . 19. PDF
    2. Tarnocai, C.T. 2003. Turf hummocks along the Arctic Bioclimate Gradient: Their characteristics and development. AGC Field Report. . 3. PDF
    3. Walker, D.A., Raynolds, M.K., Martin, C.R. 2003. Snow on the Alaska North Slope Grids, April 2003. AGC Data Report. . 28. PDF

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  1. 2002

    1. Gould, W.A. 2002. Integrating Research and Education: Biocomplexity associated with biogeochemical cycles in arctic frost-boil ecosystems. AGC Field Report. . 10. PDF
    2. Gould, W.A., Walker, D.A., Gonzalez, G. 2002. Biocomplexity Western Canadian Transect Reconnaisance. AGC Field Report. . 10. PDF
    3. Walker, D.A. 2002. Field Report for Walker ATLAS and Biocomplexity projects. AGC Field Report. . 11. PDF

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Field Reports

  1. 2003

    1. Tarnocai, C.T. 2003. Turf hummocks along the Arctic Bioclimate Gradient: Their characteristics and development. AGC Field Report. . 3. PDF

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  1. 2002

    1. Gould, W.A. 2002. Integrating Research and Education: Biocomplexity associated with biogeochemical cycles in arctic frost-boil ecosystems. AGC Field Report. . 10. PDF
    2. Gould, W.A., Walker, D.A., Gonzalez, G. 2002. Biocomplexity Western Canadian Transect Reconnaisance. AGC Field Report. . 10. PDF
    3. Walker, D.A. 2002. Field Report for Walker ATLAS and Biocomplexity projects. AGC Field Report. . 11. PDF

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Posters

  1. 2008

    1. Raynolds, M.K., Walker, D.A., Comiso, J.C. 2008. Spatial Patterns of Land Surface Temperature and NDVI on the Yamal Peninsula, Russia. NASA Carbon Cycle and Ecosystems Joint Science Workshop. Adelphi, MD April 28 - May 2. PDF
    2. Walker, D.A. 2008. North American Arctic Transect. 20th Annual Meeting and Arctic Forum. Washington, D.C. May 13-15 . PDF

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  1. 2006

    1. Daanen, R.P., Peterson, R., Misra, D., Nicolsky, D., Epstein, H.E., Walker, D.A. 2006. Modeling self organization of non-sorted circles. European Geosciences Union General Assembly. Vienna, Austria April 2-7. PDF
    2. Nickolsky, D.J., Romanovsky, V.E., Tipenko, G.S., Walker, D.A., Daanen, R.P., Overduin, P.P. 2006. Modeling reaction of non-sorted circles to changes in climate and vegetation cover. Arctic Science Conference, Arctic AAAS Division Meeting. Fairbanks, AK October 2-4. PDF
    3. Raynolds, M.K., Walker, D.A., Kade, A.N., Vonlanthen, C.M., Vockeroth, S.G., Munger, C.A., Kuss, H.P. 2006. Aboveground Phytomass of Vegetation Communities Along an Arctic Climate Gradient. Abstract C51A-0385, presented at AGU Fall Meeting. San Francisco, CA, December 11-15. 87:C51A-0385. PDF

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  1. 2005

    1. Daanen, R., Misra, D., Epstein, H.E. 2005. Modeling the Hydrology and the Effect of Climate Warming on the Non-Sorted Circle Ecosystem in the Arctic Tundra. Abstract H53C-0477, presented at AGU Fall Meeting. San Francisco, CA, December 5-9.
    2. Nicolsky, D.J., Romanovsky, V.E., Tipenko, G.S., Walker, D.A. 2005. Modeling non-sorted circles along low Arctic climate gradient, Dalton Highway, Alaska. Abstract C31A-07, presented at AGU Fall Meeting. San Francisco, CA, December 5-9. 86:C31A-1107. PDF

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  1. 2003

    1. Gould, W.A., Gonzalez, G., Walker, D.A. 2003. Biocomplexity of Frost-boil Ecosystems: Integrating science and education. Biocomplexity in the Environment Awardees Meeting. Arlington, Virginia 14 - 17 September.
    2. Kade, A.N., Walker, D.A. 2003. Manipulation of vegetation canopy and the effects on cryoturbation regime in Alaskan Arctic tundra. 54th Arctic Science Conference. Fairbanks, AK 22-24 September. PDF

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  1. 2002

    1. Cushing, E.E., Walker, D.A., Kade, A.N., Kelley, A.M. 2002. Differences in vegetation and thaw depths of frost boils and interboils of acidic and non-acidic tundra. 53rd Alaska Science Conference of the American Association for the Advancement of Science Arctic Division. Fairbanks, AK September 18-21. PDF
    2. Kade, A.N., Walker, D.A. 2002. Vegetation and Cryoturbation Interactions in Alaskan Arctic Tundra. 53rd Alaska Science Conference of the American Association for the Advancement of Science Arctic Division. Fairbanks, AK September 18-21. PDF
    3. Kade, A.N., Walker, D.A. 2002. Experimental investigation of vegetation and cryoturbation interactions in Alaskan arctic tundra. 53rd Arctic Science Conference. Fairbanks, AK 18-21 September.

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  1. 2000

    1. Gould, W.A., Raynolds, M.K., Walker, D.A. 2000. Vegetation Characteristics Derived from an Integrated Vegetation Complex Map for the Canadian Arctic. Abstract B72B-13, presented at AGU Fall Meeting. San Francisco, CA, December 15-19. 81:B72B-13.

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Talks

  1. 2011

    1. Walker, D.A. 2011. Arctic vegetation along two long bioclimatic transects in North America and Russia. Fulbright Lecture, Botany Dept., Masarysk University. Brno, Czech Republic March 10. PDF, PPT
    2. Walker, D.A., Kuss, H.P., Kopecky, M., Frost, G.V., Daniëls, F.J.A., Kade, A.N., Vonlanthen, C.M., Raynolds, M.K., Epstein, H.E. 2011. The North American and Eurasia Arctic transects: Using phytosociology and remote sensing to detect vegetation pattern and change. European Vegetation Survey 20th Workshop. Rome, Italy April 6-9. PDF

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  1. 2008

    1. Raynolds, M.K., D.A. Walker, and J.C. Comiso 2008. Spatial patterns of land surface temperature and NDVI and their relation to vegetation distribution on the Yamal Peninsula. Yamal Land-Cover Land-Use Change Workshop Moscow, Russia January 28-30. PDF
    2. Walker, D.A. 2008. Greening of the Arctic: An IPY Initiative. Does the loss of sea ice affect the tundra and those who depend on it?. Institute of Arctic Biology Seminar. Fairbanks, AK November 21. PDF
    3. Walker, D.A. 2008. Biocomplexity of Arctic Patterned Ground: A tale of cracking, heaving, and smothering!. Dynamics of Complex Systems: Common Threads Workshop. Fairbanks, AK 6 August. PDF

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  1. 2006

    1. Daanen, R.P., Misra, D., Epstein, H.E., Walker, D.A. 2006. Modeling hydrology-vegetation interactions in non-sorted-circle ecosystems. Abstract C44A-07, presented at AGU Fall Meeting. San Francisco, CA, December 11 - 15. C44A-07.
    2. Gould, W.A., González, G., Walker, D.A. 2006. Integrating research and education in a study of biocomplexity in arctic tundra ecosystems: costs, results, and benefits to the research agenda. Abstract C44A-08, presented at AGU Fall Meeting. San Francisco, CA, December 11-15. C44A-08.
    3. Kelley, A.M., Epstein, H.E., Walker, D.A., Ping, C. 2006. Soil nitrogen transformations associated with small patterned-ground features along the complete arctic bioclimatic gradient. Abstract C51A-0395, presented at AGU Fall Meeting. San Francisco, CA, December 11 - 15. C51A-0395.
    4. Kuss, P., Kade, A.N., Vonlanthen, C.M., Raynolds, M.K., Matveyeva, N.V., Daniels, F.J.A., Walker, D.A. 2006. Vegetation differentiation of arctic patterned-ground ecosystems. Abstract C44A-05, presented at AGU Fall Meeting. San Francisco, CA, December 11-15. 87:C44A-05.
    5. Michaelson, G.J., Ping, C.L., Epstein, H.E., Kimbel, J.M., Romanovsky, V.E., Tarnocai, C.T., Walker, D.A. 2006. Soil Properties and Patterned Ground Across the North American Arctic Transect. Abstract C51A-0397, presented at AGU Fall Meeting. San Francisco, CA, December 11-15. C51A-0397.
    6. Munger, C.A., Walker, D.A., Raynolds, M.K., Kade, A.N., Vonlanthen, C.M., Kuss, P., Daanen, R.P. 2006. The North American Arctic Transect: baseline vegetation and active layer maps for the IPY. Abstract C51A-0382, presented at AGU Fall Meeting. San Francisco, CA, December 11 - 15. C51A-0382.
    7. Walker, D., Daanen, R., Epstein, H.E., Gould, W., Gonzalez, G., Kade, A., Kelley, A., Krantz, W., Kuss, J.P., Michaelson, G., Munger, C., Nickolsky, D., Peterson, R., Ping, C., Raynolds, M.K., Romanovsky, V., Tarnocai, C., Vonlanthen, C. 2006. Biocomplexity of Arctic Patterned Ground: A tale of cracking, heaving, and smothering. Abstract C44A-04, presented at AGU Fall Meeting. San Francisco, CA, December 14. 87:C44A-04. PDF
    8. Walker, D.A. 2006. Complexity in natural biological ecosystems: Interactions of physical and biological processes in the formation of small patterned-ground features across the Arctic climate gradient. Dynamics of Complex Systems: Common Threads Workshop. Fairbanks, AK July 5-7. PDF

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  1. 2005

    1. Epstein, H.E., D.A. Walker, G.J. Jia, Kelley, A.M. 2005. Climate, plant biomass, NDVI, and LAI relationships along the full arctic bioclimate gradient. Abstract B33E-1092, presented at AGU Fall Meeting. San Francisco, CA, December 5-9. 86:B33E-1092.
    2. Jia, G.J., Epstein, H.E., Walker, D.A. 2005. Uneven response of arctic tundra to recent environmental changes. Abstract B33E-1091, presented at AGU Fall Meeting. San Francisco, CA, December 5-9. 86:B33E-1091.
    3. Kade, A., Walker, D.A., Romanovsky, V.E. 2005. The effect of vegetation, soil organic layer and snow on the modified N-factor in patterned-ground ecosystems. Abstract C21C-1135, presented at AGU Fall Meeting. San Francisco, CA, December 5-9. 86:C21C-1135.
    4. Kelley, A.M., Epstein, H.E., Walker, D.A. 2005. Soil nitrogen cycling associated with small patterned ground features along a high-latitude temperature gradient in northern Alaska. AGU Fall Meeting. San Francisco, CA, December 5-9. B51A-0193.
    5. Ping, C.-L., Kimble, J.M., Michaelson, G.J., Tarnocai, C., Walker, D.A. 2005. Carbon stores and their distribution in different arctic ecosystems. 1st Climate and Cryosphere International Science Conference. Beijing, China April 11 - 15.
    6. Ping, C.-L., Michaelson, G.J., Tarnocai, C., Walker, D.A. 2005. Cryogenic features of tundra soils along a bioclimate gradient in arctic Alaska and Canada. Abstract C24A-05, presented at AGU Fall Meeting. San Francisco, CA, December 5-9. 86:C24A-05.
    7. Raynolds, M.K., Walker, D.A., Kade, A.N., Munger, C.A. 2005. Small-scale patterned ground in the Arctic: Maps of vegetation and thaw depth on a north-south transect. Abstract C24A-06, presented at AGU Fall Meeting. San Francisco, CA, December 5-9. 86:C24A.
    8. Shur, Y., Ping, C.L., Walker, D.A. 2005. Comprehensive model of frost boils and earth hummocks formation. 2nd European Conference on Permafrost. Potsdam, Germany 12-16 June. PDF
    9. Tarnocai, C., Walker, D. 2005. Turf hummocks along a climatic gradient in Arctic Canada: characteristics and development. 2nd European Conference on Permafrost. Potsdam, Germany June 12-16.
    10. Walker, D.A. 2005. Polygenetic origin of small patterned-ground features. Biocomplexity of Frost Boils Modeling Workshop. Fairbanks, AK March 14-16. PDF
    11. Walker, D.A. 2005. Biocomplexity of small patterned-ground features: A North American Arctic Transect. Institute of Arctic Biology Seminar. Fairbanks, AK October 28. PDF
    12. Walker, D.A., Daanen, R.P., Epstein, H.E., Gonzalez, G., Gould, W.A., Kade, A.N., Kelley, A.M., Krantz, W.B., Michaelson, G.J., Munger, C.A., Nickolsky, D.J., Peterson, R.A., Ping, C.L., Raynolds, M.K., Romanovsky, V.E., Shur, Y.L., Tarnocai, C.T., Tipenko, G.S., Timling, I., Vonlanthen, C.M. 2005. The North American Arctic Transect: Patterned ground ecosystems across the full arctic bioclimate gradient. Abstract C24A-03, presented at AGU Fall Meeting. San Francisco, CA, December 5-9. 86:C24A-03.

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  1. 2004

    1. Chappell, G.G., Brody, B., Webb, P., Chord, J., Romanovsky, V., Tipenko, G. 2004. Virtual Reality Visualization of Permafrost Dynamics Along a Transect Through Northern Alaska. Abstract C43B-0231, presented at AGU Fall Meeting. San Francisco, CA, December 13-17. 85:C43B-0231.
    2. Hinzman, L.D., Bettez, N., Bolton, W.R., Chapin, F.S., III, Dyurgerov, M.B., Fastie, C.L., Griffith, B., Hollister, R.D., Hope, A., Huntington, H.P., Jensen, A.M., Jia, G.J., Jorgensen, T., Kane, D.L., Klein, D.R., Kofinas, G.P., Lynch, A.H., Lloyd, A.H., Nolan, M., Oechel, W.C., Osterkamp, T.E., Racine, C.H., Romanovsky, V.E., Stone, R.S., Stow, D.A., Sturm, M., Tweedie, C.E., Vourlitis, G.L., Walker, M.D., Walker, D.A., Webber, P.J., Welker, J.M., Yoshikawa, K. 2004. Evidence and Implications of Recent Climate Change in Northern Alaska and Other Arctic Regions. Abstract GC51A-1052, presented at AGU Fall Meeting. San Francisco, CA, December 13-17. 85:GC51A-1052.
    3. Nicolsky, D.J., Romanovsky, V.E., Tipenko, G.S., Walker, D.A. 2004. A coupled thermo-mechanical model of differential frost heave. Abstract C13B-0282, presented at AGU Fall Meeting. San Francisco, CA, December 13-17. 85:C13B-0282.
    4. Tipenko, G.S., Marchenko, S., Romanovsky, V.E., Groshev, V., Sazonova, T. 2004. Spatially Distributed Model of Permafrost Dynamics in Alaska. Abstract C12A-02, presented at AGU Fall Meeting. San Francisco, CA, December 13-17. 85:C12A-02.
    5. Walker, D.A. 2004. Greening of the Arctic: A transect to monitor terrestrial change across the full Arctic bioclimate gradient. IPY Workshop. Fairbanks, AK November 29. PDF
    6. Walker, D.A., Epstein, H.E., Kuss, P., Michaelson, G., Ping, C.L., Raynolds, M.K., Romanovsky, V.E., Tarnocai, C.T. 2004. Interactions of multiple factors for patterned-ground features across the Arctic bioclimate gradient. Abstract C12A-07, presented at AGU Fall Meeting. San Francisco, CA, December 13-17. 85:F424. PDF

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  1. 2003

    1. Epstein, H.E., Calef, M., Jia, G.J., Chapin, F.S., III, Walker, D.A., Walker, M.D., Starfield, A. 2003. Dynamics of Vegetation and Soils in Arctic Tundra Ecosystems. Field talk. Toolik Field Station, AK June 30. PDF
    2. Gonzalez, G. 2003. Biocomplexity of Frost boil Ecosystems: Educational Component. Toolik Field Station, AK June 30 - July 15. PDF
    3. Gould, W.A., Gonzalez, G., Walker, D.A. 2003. Integrating research and education in a study of Arctic frost-boil ecosystems. Abstract ED21B-1218, presented at AGU Fall Meeting. San Francisco, CA, December 8 - 12. 84:ED21B-1218.
    4. Gould, W.A., Quijano, A., Gonzalez, G., Walker, D.A. 2003. Variation in frost-boil morphology and associated vegetation characteristics along a climatic gradient. Abstract B31C-0311, presented at AGU FAll Meeting. San Francisco, CA, December 8-12. 84:B31C-0311.
    5. Kade, A.N., Walker, D.A. 2003. Experimental Alteration of Plant Canopy and the Effects on Cryoturbation Regime. Field talk. Toolik Field Station, AK June 30. PDF
    6. Kelley, A.M., Epstein, H.E. 2003. Plant Community and Nitrogen Cycling in Arctic Frost-Boil Ecosystems. Toolik Field Station, AK June 30 - July 15. PDF
    7. Krantz, W.B. 2003. Geophysical Self-Organization as an Indicator of Global Climate Change. Toolik Field Station, AK June 30 - July 15. PDF
    8. Michaelson, G.J., Ping, C.L., Walker, D.A. 2003. Biogeochemistry of Soils Associated with Cryptogamic Crusts on Frost Boils. Field talk. Toolik Field Station, AK June 30. PDF
    9. Nicolsky, D.J., Tipenko, G.S., Romanovsky, V.E. 2003. Developing a numerical model of frost boils dynamics. Abstract C21B-0813, presented at AGU Fall Meeting. San Francisco, CA, December 8-12. 84:C21B-0813.
    10. Peterson, R.A., Walker, D.A., Romanovsky, V.E., Knudson, J.A., Raynolds, M.K., Krantz, W.B. 2003. A differential frost heave model: cryoturbation-vegetation interactions. Abstract Complete set of PDFs, presented at Proceedings of the Eighth International Conference on Permafrost. Lisse, 21-25 July. 2:885-890. PDF
    11. Ping, C.L., Michaelson, G.J., Kimbel, J.M., Shur, Y.L., Walker, D.A. 2003. Morphogenesis of Soils Associated with Frost Boils. Field talk. Toolik Field Station, AK June 30. PDF
    12. Romanovsky, V. 2003. Permafrost, Active Layer, Soil Temperature and Moisture, Frost Heave and other Things. Toolik Field Station, AK June 30. PDF
    13. Shur, Y.L., Ping, C.L. 2003. The Driving Force of Frost Boils and Hummocks Formation. Abstract C21B-0823, presented at AGU Fall Meeting. San Francisco, CA, December 8-12. 84:C21B-0823.
    14. Tarnocai, C. 2003. Banks Island Photos. Toolik Field Station, AK June 30. PDF
    15. Tarnocai, C.T. 2003. Geology and Soils. Toolik Field Station, AK June 30. PDF

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  1. 2002

    1. Michaelson, G.J., Ping, C.L., Walker, D.A. 2002. Biogeochemistry of Soils Associated with Cryptogamic Crusts on Frost Boils. Abstract B12A-0778, presented at AGU Fall Meeting. San Francisco, CA, December 6-10. 83:F260.
    2. Ping, C.-L., Michaelson, G.J., Kimble, J., Shur, Y.L., Walker, D.A. 2002. Morphogenesis of soils associated with frost boils. Abstract B12A-0775, presented at AGU Fall Meeting. San Francisco, CA, December 6-10. 83:F259. PDF
    3. Walker, D.A., Epstein, H.E., Gould, W.A., Krantz, W.B., Tipenko, G., Ping, C.L., Romanovsky, V., Walker, M.D. 2002. Biocomplexity of Frost-boil Ecosystems. 53rd Arctic Science Conference. Fairbanks, AK September 18-21. PDF
    4. Walker, D.A., Jia, G.J., Epstein, H.E., Shiklomanov, N.I., Nelson, F.E., Hinzman, L.D., Romanovsky, V.E. 2002. Vegetation-soil-active layer relationships along a low-arctic bioclimate gradient, Alaska. Abstract B72D-02, presented at AGU Fall Meeting. San Francisco, CA, December 6-10. 83:B72D-02.
    5. Walker, D.A., Knudson, J.A. 2002. Biocomplexity of frost boil ecosystems. 53rd Arctic Science Conference. Fairbanks, AK September 18-21.
    6. Walker, D.A., Raynolds, M.K., Maier, H.A., Murray, D.F., Markon, C.J., Talbot, S.S., Gould, W.A., Bliss, L.C., Edlund, S.A., Zoltai, S.C., Daniels, F.J.A., Wilhelm, M., Bay, C., Einarsson, E., Gundjonsson, G., Moskalenko, N.G., Ananjeva, G.V., Drozdov, D.S., Konchenko, L.A., Korostelev, Y.V., Melnikov, E., Ponomareva, O.E., Katenin, A.E., Kholod, S.S., Matveyeva, N.V., Safranova, I.N., Shelkunova, R., Yurtsev, B.A., Polezhaev, A.N., Elvebakk, A., Johansen, B.E., Trahan, N.G., Charron, T.M. 2002. Draft of the Circumpolar Arctic Vegetation Map. 53rd Alaska Science Conference of the American Association for the Advancement of Science Arctic Division. Fairbanks, AK September 18-21. PDF

Field Season '03 Talks

  1. 2003

    1. Epstein, H.E., Calef, M., Jia, G.J., Chapin, F.S., III, Walker, D.A., Walker, M.D., Starfield, A. 2003. Dynamics of Vegetation and Soils in Arctic Tundra Ecosystems. Field talk. Toolik Field Station, AK June 30. PDF
    2. Gonzalez, G. 2003. Biocomplexity of Frost boil Ecosystems: Educational Component. Toolik Field Station, AK June 30 - July 15. PDF
    3. Kade, A.N., Walker, D.A. 2003. Experimental Alteration of Plant Canopy and the Effects on Cryoturbation Regime. Field talk. Toolik Field Station, AK June 30. PDF
    4. Kelley, A.M., Epstein, H.E. 2003. Plant Community and Nitrogen Cycling in Arctic Frost-Boil Ecosystems. Toolik Field Station, AK June 30 - July 15. PDF
    5. Krantz, W.B. 2003. Geophysical Self-Organization as an Indicator of Global Climate Change. Toolik Field Station, AK June 30 - July 15. PDF
    6. Michaelson, G.J., Ping, C.L., Walker, D.A. 2003. Biogeochemistry of Soils Associated with Cryptogamic Crusts on Frost Boils. Field talk. Toolik Field Station, AK June 30. PDF
    7. Ping, C.L., Michaelson, G.J., Kimbel, J.M., Shur, Y.L., Walker, D.A. 2003. Morphogenesis of Soils Associated with Frost Boils. Field talk. Toolik Field Station, AK June 30. PDF
    8. Romanovsky, V. 2003. Permafrost, Active Layer, Soil Temperature and Moisture, Frost Heave and other Things. Toolik Field Station, AK June 30. PDF
    9. Tarnocai, C. 2003. Banks Island Photos. Toolik Field Station, AK June 30. PDF
    10. Tarnocai, C.T. 2003. Geology and Soils. Toolik Field Station, AK June 30. PDF

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