Shrub-induced snowpack variability alters wintertime soil respiration across a simulated tundra landscape

References

• Baptist F., Yoccoz N.G. & Choler P. 2010. Direct and indirect control by snow cover over decomposit ion in alpine tundra along a snowmelt gradient. Plant and Soil 328, 397–6.
   Web of Science ®Google Scholar
• Benson C.S. & Sturm M. 1993. Structure and wind transport of seasonal snow on the Arctic slope of Alaska. Annals of Glaciology 18, 261–267.
   Google Scholar
• Bintanja R. & Selten F.M. 2014. Future increases in Arctic precipitation linked to local evaporation and sea-ice retreat. Nature 509, 479.
   Web of Science ®Google Scholar
• Blok D., Elberling B. & Michelsen A. 2016. Initial stages of tundra shrub litter decomposition may be accelerated by deeper winter snow but slowed down by spring warming. Ecosystems 19, 155–169.
   Web of Science ®Google Scholar
• Bueno C.G., Williamson S.N., Barrio I.C., Helgadóttir Á. & Hik D.S. 2016. Moss mediates the influence of shrub species on soil properties and processes in alpine tundra. PLoS One 11, e0164143, doi: 10.1371/journal.pone.0164143.
   Web of Science ®Google Scholar
• Christie K.S., Bryant J.P., Gough L., Ravolainen V.T., Ruess R.W. & Tape K.D. 2015. The role of vertebrate herbivores in regulating shrub expansion in the Arctic: a synthesis. BioScience 65, 1123–1133.
   Web of Science ®Google Scholar
• Essery R. & Pomeroy J. 2004. Vegetation and topographic control of wind-blown snow distributions in distributed and aggregated simulations for an Arctic tundra basin. Journal of Hydrometeorology 5, 735–744.
   Web of Science ®Google Scholar
• Fahnestock J.T., Jones M.H. & Welker J.M. 1999. Wintertime CO2 efflux from Arctic soils: implications for annual carbon budgets. Global Biogeochemical Cycles 13, 775–779.
   Web of Science ®Google Scholar
• Ge Y. & Gong G. 2010. Land surface insulation response to snow depth variability. Journal of Geophysical Research—Atmospheres 115, article no. 08107, doi: 10.1029/2009JD012798.
   Web of Science ®Google Scholar
• Grogan P. & Jonasson S. 2006. Ecosystem CO2 production during winter in a Swedish Subarctic region: the relative importance of climate and vegetation type. Global Change Biology 12, 1479–1495.
   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 Phytologist 186, 890–899.
   PubMed Web of Science ®Google Scholar
• Hobbie S.E. & Chapin F.S. III. 1996. Winter regulation of tundra litter carbon and nitrogen dynamics. Biogeochemistry 35, 327–338.
   Web of Science ®Google Scholar
• Hugelius G., Strauss J., Zubrzycki S., Harden J.W., Schuur E., Ping C.L., Schirrmeister L., Grosse G., Michaelson G.J., Koven C.D. & O’Donnell J.A. 2014. Estimated stocks of circumpolar permafrost carbon with quantified uncertainty ranges and identified data gaps. Biogeosciences 11, 6573–6593.
   Web of Science ®Google Scholar
• Liston G.E., Mcfadden J.P., Sturm M. & Pielke R.A. 2002. Modelled changes in Arctic tundra snow, energy and moisture fluxes due to increased shrubs. Global Change Biology 8, 17–32.
   Web of Science ®Google Scholar
• McLaren J.R., Buckeridge K.M., Weg M.J., Shaver G.R., Schimel J.P. & Gough L. 2017. Shrub encroachment in Arctic tundra: Betula nana effects on above‐ and belowground litter decomposition. Ecology 98, 1361–1376.
   Web of Science ®Google Scholar
• Mikan C.J., Schimel J.P. & Doyle A.P. 2002. Temperature controls of microbial respiration in Arctic tundra soils above and below freezing. Soil Biology and Biochemistry 34, 1785–1795.
   Web of Science ®Google Scholar
• Morgner E., Elberling B., Strebel D. & Cooper E.J. 2010. The importance of winter in annual ecosystem respiration in the High Arctic: effects of snow depth in two vegetation types. Polar Research 29, 58–74.
   Web of Science ®Google Scholar
• Myers-Smith I.H., Forbes B.C., Wilmking M., Hallinger M., Lantz T., Blok D., Tape K.D., Macias-Fauria M., Sass-Klaassen U., Lévesque E. & Boudreau S. 2011. Shrub expansion in tundra ecosystems: dynamics, impacts and research priorities. Environmental Research Letters 6, 045509, doi: 10.1088/1748-9326/6/4/045509.
   Web of Science ®Google Scholar
• Myers‐Smith I.H. & Hik D.S. 2013. Shrub canopies influence soil temperatures but not nutrient dynamics: an experimental test of tundra snow–shrub interactions. Ecology and Evolution 3, 3683–3700.
   PubMed Web of Science ®Google Scholar
• Natali S.M., Schuur E.A. & Rubin R.L. 2012. Increased plant productivity in Alaskan tundra as a result of experimental warming of soil and permafrost. Journal of Ecology 100, 488–498.
   Web of Science ®Google Scholar
• Nauta A.L., Heijmans M.M., Blok D., Limpens J., Elberling B., Gallagher A., Li B., Petrov R.E., Maximov T.C., Van Huissteden J. & Berendse F. 2015. Permafrost collapse after shrub removal shifts tundra ecosystem to a methane source. Nature Climate Change 5, 67–70.
   Web of Science ®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, 419–431.
   Web of Science ®Google Scholar
• Oechel W.C., Laskowski C.A., Burba G., Gioli B. & Kalhori A.A. 2014. Annual patterns and budget of CO2 flux in an Arctic tussock tundra ecosystem. Journal of Geophysical Research—Biogeosciences 119, 323–339.
   Web of Science ®Google Scholar
• Paradis M., Lévesque E. & Boudreau S. 2016. Greater effect of increasing shrub height on winter versus summer soil temperature. Environmental Research Letters 11, 085005, doi: 10.1088/1748-9326/11/8/085005.
   Web of Science ®Google Scholar
• R Core Team. 2016. R: a language and environment for statistical computing. Vienna: R Foundation for Statistical Computing.
   Google Scholar
• Rastetter E.B. 2017. Modeling for understanding v. modeling for numbers. Ecosystems 20, 215–221.
   Web of Science ®Google Scholar
• Rogers M.C., Sullivan P.F. & Welker J.M. 2011. Evidence of nonlinearity in the response of net ecosystem CO2 exchange to increasing levels of winter snow depth in the High Arctic of northwest Greenland. Arctic, Antarctic, and Alpine Research 43, 95–106.
   Web of Science ®Google Scholar
• Schimel J.P., Bilbrough C. & Welker J.M. 2004. Increased snow depth affects microbial activity and nitrogen mineralization in two Arctic tundra communities. Soil Biology and Biochemistry 36, 217–227.
   Web of Science ®Google Scholar
• Stieglitz M., Ducharne A., Koster R. & Suarez M. 2001. The impact of detailed snow physics on the simulation of snow cover and subsurface thermodynamics at continental scales. Journal of Hydrometeorology 2, 228–242.
   Web of Science ®Google Scholar
• Stuefer S.L., Homan J.W., Youcha E.K., Kane D.L. & Gieck R.E. 2012. Snow survey data for the central north slope watersheds: spring 2012. Report INE/WERC 12.22. Fairbanks, AK: Water and Environmental Research Center, University of Alaska Fairbanks.
   Google Scholar
• Sturm M., Holmgren J., McFadden J.P., Liston G.E., Chapin F.S. III & Racine C.H. 2001. Snow–shrub interactions in Arctic tundra: a hypothesis with climatic implications. Journal of Climate 14, 336–344.
   Web of Science ®Google Scholar
• Sturm M., Schimel J., Michaelson G., Welker J.M., Oberbauer S.F., Liston G.E., Fahnestock J. & Romanovsky V.E. 2005. Winter biological processes could help convert Arctic tundra to shrubland. AIBS Bulletin 55, 17–26.
   Google Scholar
• Tape K., Sturm M. & Racine C. 2006. The evidence for shrub expansion in northern Alaska and the Pan‐Arctic. Global Change Biology 12, 686–702.
   Web of Science ®Google Scholar
• Taras B., Sturm M. & Liston G.E. 2002. Snow–ground interface temperatures in the Kuparuk River Basin, Arctic Alaska: measurements and model. Journal of Hydrometeorology 3, 377–394.
   Web of Science ®Google Scholar
• Tarnocai C., Canadell J.G., Schuur E.A.G., Kuhry P., Mazhitova G. & Zimov S. 2009. Soil organic carbon pools in the northern circumpolar permafrost region. Global Biogeochemical Cycles 23, GB2023, doi: 10.1029/2008GB003327.
   Web of Science ®Google Scholar
• Walker D.A., Raynolds M.K., Daniëls F.J., Einarsson E., Elvebakk A., Gould W.A., Katenin A.E., Kholod S.S., Markon C.J., Melnikov E.S. & Moskalenko N.G. 2005. The circumpolar Arctic vegetation map. Journal of Vegetation Science 16, 267–282.
   Web of Science ®Google Scholar
• Walker M.D., Walker D.A., Welker J.M., Arft A.M., Bardsley T., Brooks P.D., Fahnestock J.T., Jones M.H., Losleben M., Parsons A.N. & Seastedt T.R. 1999. Long-term experimental manipulation of winter snow regime and summer temperature in Arctic and alpine tundra. Hydrological Processes 13, 2315–2330.
   Web of Science ®Google Scholar
• Zhang T. 2005. Influence of the seasonal snow cover on the ground thermal regime: an overview. Reviews of Geophysics 43, RG4002, doi: 10.1029/2004RG000157.
   Web of Science ®Google Scholar
• Zhang W., Miller P.A., Smith B., Wania R., Koenigk T. & Döscher R. 2013. Tundra shrubification and tree-line advance amplify Arctic climate warming: results from an individual-based dynamic vegetation model. Environmental Research Letters 8, 034023, doi: 10.1088/1748-9326/8/3/034023.
   Web of Science ®Google Scholar