Abstract
Elevated global temperatures are expected to alter vegetation dynamics by interacting with physiological processes, biotic relationships and disturbance regimes. However, few studies have explicitly modeled the effects of these interactions on rates of vegetation change, despite such information being critical to forecasting temporal patterns in vegetation dynamics. In this study, we build and parameterize rate-change models for three dominant alpine life forms using data from a 7-year warming experiment. These models allowed us to examine how the interactions between experimental warming, the abundance of bare ground (a measure of past disturbance) and neighboring life forms (a measure of life form interaction) affect rates of cover change in alpine shrubs, graminoids and forbs. We show that experimental warming altered rates of life form cover change by reducing the negative effects of neighboring life forms and positive effects of bare ground. Furthermore, we show that our models can predict the observed direction and rate of life form cover change at burned and unburned long-term monitoring sites. Model simulations revealed that warming in unburned vegetation is expected to result in increased forb and shrub cover and decreased graminoid cover. In contrast, in burned vegetation, warming is predicted to slow post-fire regeneration in both graminoids and forbs and facilitate rapid expansion in shrub cover. These findings illustrate the applicability of modeling rates of vegetation change using experimental data. Our results also highlight the need to account for both disturbance and the abundance of other life forms when examining and forecasting vegetation dynamics under climatic change.
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Arft AM, Walker MD, Gurevitch J, Alatalo JM, Bret-Harte MS, Dale M, Diemer M, Gugerli F, Henry GHR, Jones MH, Hollister RD, Jónsdóttir IS, Laine K, Lévesque E, Marion GM, Molau U, Mølgaard P, Nordenhäll U, Raszhivin V, Robinson CH, Starr G, Stenström A, Stenstrom M, Totland Ø, Turner PL, Walker LJ, Webber PJ, Welker JM, Wookey PA (1999) Responses of tundra plants to experimental to experimental warming: meta-analysis of the International Tundra Experiment. Ecol Monogr 69:491–511
Bertness MD, Callaway R (1994) Positive interactions in communities. Trends Ecol Evol 9:191–193
Bradstock R, Penman T, Boer M, Price O, Clarke H (2014) Divergent responses of fire to recent warming and drying across south-eastern Australia. Glob Change Biol 20:1412–1428
Brooker RW, Kikvidze Z (2008) Importance: an overlooked concept in plant interaction research. J Ecol 96:703–708
Brooks SP, Gelman A (1998) General methods for monitoring convergence of iterative simulations. J Comput Graph Stat 7:434–455
Callaway R, Brooker RW, Choler P, Kikvidze Z, Lortie CJ, Michalet R, Paolini L, Pugnaire FI, Newingham BA, Aschehoug ET, Armas C, Kikodze D, Cook BJ (2002) Positive interactions among alpine plants increase with stress. Nature 417:844–848
Camac JS, Williams RJ, Wahren C-H, Morris WK, Morgan JW (2013) Post-fire regeneration in alpine heathland: does fire severity matter? Austral Ecol 38:199–207
Cavieres LA, Badano EI, Sierra-Almeida A, Gómez-Gónzález S, Molina-Montenegro MA (2006) Positive interactions between alpine plant species and the nurse cushion plant Laretia acaulis do not increase with elevation in the Andes of central Chile. New Phytol 169:59–69
Chapin FS III (1983) Direct and indirect effects of temperature on arctic plants. Polar Biol 2:47–52
Chapin FS III, Shaver GR (1996) Physiological and growth responses of Arctic plants to a field experiment simulating climatic change. Ecology 77:822
Chesson P (1994) Multispecies competition in variable environments. Theor Popul Biol 45:227–276
Clarke H, Lucas C, Smith P (2013) Changes in Australian fire weather between 1973 and 2010. Int J Climatol 33:931–944
Cumming G, Finch S (2005) Inference by eye—confidence intervals and how to read pictures of data. Am Psychol 60:170–180
Dormann CF, Woodin SJ (2002) Climate change in the Arctic: using plant functional types in a meta-analysis of field experiments. Funct Ecol 16:4–17
Dullinger S, Gattringer A, Thuiller W, Moser D, Zimmermann NE, Guisan A, Willner W, Plutzar C, Leitner M, Mang T, Caccianiga M, Dirnböck T, Ertl S, Fischer A, Lenoir J, Svenning J-C, Psomas A, Schmatz DR, Silc U, Vittoz P, Hülber K (2012) Extinction debt of high-mountain plants under twenty-first-century climate change. Nature Climate Change 2:619–622
Elmendorf SC, Henry GHR, Hollister RD, Björk RG, Bjorkman AD, Callaghan TV, Collier LS, Cooper EJ, Cornelissen JHC, Day TA, Fosaa AM, Gould WA, Grétarsdóttir J, Harte J, Hermanutz L, Hik DS, Hofgaard A, Jarrad F, Jónsdóttir IS, Keuper F, Klanderud K, Klein JA, Koh S, Kudo G, Lang SI, Loewen V, May JL, Mercado J, Michelsen A, Molau U, Myers-Smith IH, Oberbauer SF, Pieper S, Post E, Rixen C, Robinson CH, Schmidt NM, Shaver GR, Stenström A, Tolvanen A, Totland Ø, Troxler T, Wahren C-H, Webber PJ, Welker JM, Wookey PA (2012) Global assessment of experimental climate warming on tundra vegetation: heterogeneity over space and time. Ecol Lett 15:164–175
Gelman A (2006) Prior distributions for variance parameters in hierarchical models. Bayesian Anal 1:515–533
Gelman A, Hill J (2007) Data analysis using regression and multilevel/hierarchical models. Cambridge University Press, Cambridge
Gelman A, Jakulin A, Pittau M, Su Y-S (2008) A weakly informative default prior distribution for logistic and other regression models. Ann Appl Stat 2:1360–1383
Gottfried M, Pauli H, Futschik A, Akhalkatsi M, Barančok P, Benito Alonso JL, Coldea G, Dick J, Erschbamer B, Fernández Calzado MAR, Kazakis G, Krajči J, Larsson P, Mallaun M, Michelsen O, Moiseev D, Moiseev P, Molau U, Merzouki A, Nagy L, Nakhutsrishvili G, Pedersen B, Pelino G, Puscas M, Rossi G, Stanisci A, Theurillat J-P, Tomaselli M, Villar L, Vittoz P, Vogiatzakis I, Grabherr G (2012) Continent-wide response of mountain vegetation to climate change. Nature Climate Change 2:111–115
Griffin PC, Hoffmann AA (2012) Mortality of Australian alpine grasses (Poa spp.) after drought: species differences and ecological patterns. J Plant Ecol 5:121–133
Grime JP (1977) Evidence for the existence of three primary strategies in plants and its relevance to ecological and evolutionary theory. Am Nat 111:1169–1194
Hanski I (1999) Metapopulation ecology. Oxford University Press
Hoffmann AA, Camac JS, Williams RJ, Papst WA, Jarrad FC, Wahren C-H (2010) Phenological changes in six Australian subalpine plants in response to experimental warming and year-to-year variation. J Ecol 98:927–937
Hudson JMG, Henry GHR, Cornwell WK (2011) Taller and larger: shifts in Arctic tundra leaf traits after 16 years of experimental warming. Glob Change Biol 17:1013–1021
IPCC (2013) Climate change 2013: The physical science basis. In: TF Stocker, D Qin, GK Plattner, M Tignor, SK Allen, J Boschung, A Nauels, Y Xia, V Bex, PM Midgley (eds) Contribution of Working Group I to the fifth assessment report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge
Jarrad FC, Wahren C-H, Williams RJ, Burgman MA (2008) Impacts of experimental warming and fire on phenology of subalpine open-heath species. Aust J Bot 56:617–629
Jay F, Manel S, Alvarez N, Durand EY, Thuiller W, Holderegger R, Taberlet P, François O (2012) Forecasting changes in population genetic structure of alpine plants in response to global warming. Mol Ecol 21:2354–2368
Klanderud K (2005) Climate change effects on species interactions in an alpine plant community. J Ecol 93:127–137
Körner C (2003) Alpine plant life, 2nd edn. Springer, Berlin
Lantz TC, Kokelj SV, Gergel SE, Henry GHR (2009) Relative impacts of disturbance and temperature: persistent changes in microenvironment and vegetation in retrogressive thaw slumps. Glob Change Biol 15:1664–1675
le Roux PC, Aalto J, Luoto M (2013) Soil moisture’s underestimated role in climate change impact modelling in low-energy systems. Glob Change Biol 19:2965–2975
Levins R (1969) Some demographic and genetic consequences of environmental heterogeneity for biological control. Bull Entomol Soc Am 15:237–240
McDougall KL, Walsh NG (2007) Treeless vegetation of the Australian Alps. Cunninghamia 10:1–57
Molau U, Mølgaard P (1996) ITEX manual. Danish Polar Centre, Copenhagen, pp 1–85
Morgan JW (2004) Drought-related dieback in four subalpine shrub species, Bogong High Plains, Victoria. Cunninghamia 8:326–330
Myers-Smith IH, Forbes BC, Wilmking M, Hallinger M, Lantz T, Blok D, Tape K, Macias-Fauria M, Sass-Klaassen U, Lévesque 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, Ménard CB, Venn SE, Goetz S, Andreu-Hayles L, Elmendorf SC, Ravolainen V, Welker JM, Grogan P, Epstein HE, Hik DS (2011) Shrub expansion in tundra ecosystems: dynamics, impacts and research priorities. Environ Res Lett 6:045509
Nash MA, Griffin PC, Hoffmann AA (2013) Inconsistent responses of alpine arthropod communities to experimental warming and thermal gradients. Climate Res 55:227–237
Olsen SL, Klanderud K (2013) Biotic interactions limit species richness in an alpine plant community, especially under experimental warming. Oikos 123:71–78
Pauli H, Gottfried M, Reiter K, Klettner C, Grabherr G (2007) Signals of range expansions and contractions of vascular plants in the high Alps: observations (1994–2004) at the GLORIA* master site Schrankogel, Tyrol, Austria. Glob Change Biol 13:147–156
Pickett STA, White PA (1985) The ecology of natural disturbance and patch dynamics. Academic Press, pp 1–472
Plummer M (2011) JAGS version 3.1.0 user manual
Pugnaire FI, Armas C, Valladares F (2009) Soil as a mediator in plant-plant interactions in a semi-arid community. J Veg Sci 15:85–92
Richards FJ (1959) A flexible growth function for empirical use. J Exp Bot 10:290–300
Sánchez-Bayo F, Green K (2013) Australian snowpack disappearing under the influence of global warming and solar activity. Arct Antarct Alp Res 45:107–118
Sokal RR, Rohlf FJ (1995) Biometry, 3rd edn. Freeman, New York
Su Y-S, Yajima M (2012) R2jags: a package for running jags from R. R package version 0.03-06. pp 1–12. http://CRAN.R-project.org/package=R2jags
Tilman D (1988) Plant strategies and the structure and dynamics. Princeton University Press
Turetsky MR, Kane ES, Harden JW, Ottmar RD, Manies KL, Hoy E, Kasischke ES (2011) Recent acceleration of biomass burning and carbon losses in Alaskan forests and peatlands. Nat Geosci 4:27–31
Turner MG (2010) Disturbance and landscape dynamics in a changing world. Ecology 91:2833–2849
Tylianakis JM, Didham RK, Bascompte J, Wardle DA (2008) Global change and species interactions in terrestrial ecosystems. Ecol Lett 11:1351–1363
Volterra V (1926) Fluctuations in the abundance of a species considered mathematically. Nature 118:558–560
Wahren C-H, Papst WA, Williams RJ (1994) Long-term vegetation change in relation to cattle grazing in sub-alpine grassland and heathland on the Bogong High-Plains: an analysis of vegetation records from 1945 to 1994. Aust J Bot 42:607–639
Wahren C-H, Camac JS, Jarrad FC, Williams RJ, Papst WA, Hoffmann AA (2013) Experimental warming and long-term vegetation dynamics in an alpine heathland. Aust J Bot 61:36–51
Westerling AL, Turner MG, Smithwick EAH, Romme WH, Ryan MG (2011) Continued warming could transform greater yellowstone fire regimes by mid-21st century 108:13165–13170
Williams RJ (1985) Aspects of shrub-grass dynamics on the Bogong High Plains (subalpine), Victoria. PhD thesis, the University of Melbourne
Williams RJ (1992) Gap dynamics in subalpine heathland and grassland vegetation in south-eastern Australia. J Ecol 80:343–352
Williams RJ, Papst WA, McDougall KL, Mansergh IM, Heinze DA, Camac JS, Nash MA, Morgan JW, Hoffmann AA (2014) Alpine Ecosystems. In: Lindenmayer DB, Burns E, Thurgate N, Lowe A (eds) Biodiversity and environmental change: monitoring, challenges and directions. CSIRO, Melbourne, pp 167–212
Wipf S, Stoeckli V, Bebi P (2009) Winter climate change in alpine tundra: plant responses to changes in snow depth and snowmelt timing. Clim Change 94:105–121
Acknowledgments
This research was funded through Australian Research Council Linkage Grants, partnered through the Department of Sustainability and Environment, Parks Victoria and the Commonwealth Scientific and Industrial Research Organisation (CSIRO). The Australian Research Council Centre of Excellence for Environment Decisions (CEED) and Holsworth Wildlife Research Committee also supported this research. J. S. C. was a recipient of an Australian Postgraduate Award. Monica Camac, Shona Arber, Deborah Cargill, Seraphina Cutler, Bradley Farmilo, Lauren Keim, Katherine Giljohann, Annie Leschen, Luke O’Laughlin, Matthew Richardson, Linda Riquelme, Paul Smart, Karen Stott, Freya Thomas and Emma Warrenall aided in data collection. Special thanks to William Morris, Chris Jones and John Baumgartner for modeling advice and Warwick Papst for logistics. Lastly we thank the anonymous reviewers for their constructive comments on this manuscript. The experiment and long-term monitoring was conducted in accordance with current Australian laws. This research was conducted under Parks Victoria permit number 10005232.
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Camac, J.S., Williams, R.J., Wahren, CH. et al. Modeling rates of life form cover change in burned and unburned alpine heathland subject to experimental warming. Oecologia 178, 615–628 (2015). https://doi.org/10.1007/s00442-015-3261-2
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DOI: https://doi.org/10.1007/s00442-015-3261-2