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RESEARCH ARTICLE
Contents Vol 57(6)

Subalpine plants show short-term positive growth responses to experimental warming and fire

Frith C. Jarrad A D E , Carl-Henrik Wahren B , Richard J. Williams C and Mark A. Burgman A
+ Author Affiliations
- Author Affiliations

A School of Botany, University of Melbourne, Parkville, Vic. 3010, Australia.

B Centre for Applied Alpine Ecology, LaTrobe University, Melbourne, Vic. 3086, Australia.

C CSIRO Sustainable Ecosystems, Winnellie, NT 0822, Australia.

D Current address: School of Mathematical Sciences, Queensland University of Technology, Brisbane, Queensland 4001, Australia.

E Corresponding author. Email: frithjarrad@qut.edu.au

Australian Journal of Botany 57(6) 465-473 https://doi.org/10.1071/BT09050
Submitted: 3 March 2009  Accepted: 20 September 2009   Published: 9 November 2009

Abstract

Climate warming has the potential to directly affect plant growth rates by accelerating plant processes, and through intermediate affects associated with increased length of the growing season and changes to soil processes. Alpine and subalpine ecosystems may be particularly vulnerable to climate warming because species are adapted to a cold environment and have limited upslope refugia in Australia. In the present study, the vegetative growth of seven subalpine open-heath species was examined in response to 3 years of warming and a wildfire. The warming experiment was established in late 2003 on the Bogong High Plains, Australia, using the protocols of the International Tundra Experiment (ITEX). During the growing seasons (snow-free periods) in 2004/2005 and 2005/2006 leaves and stems were monitored on common or widespread species from each of the major vascular plant growth forms. Plants were monitored inside and outside passively warmed open-topped chambers, at sites that were burnt in early 2003 and sites that escaped fire. In the short-term, warming had significant positive relationships with relative growth rates of three species, including Celmisia pugioniformis (forb; P = 0.09), Carex breviculmis (graminoid; P = 0.004) and Asterolasia trymalioides (shrub; P = 0.02). Burning had significant positive effects (P < 0.05) on the relative growth rates of two of these species, C. pugioniformis and C. breviculmis, as well as for Plantago euryphylla, Poa hiemata and Pimelea alpina. For P. euryphylla and P. alpina, the interaction of warming and burning showed significant relationships with relative growth rates, a negative relationship in P. euryphylla (P = 0.03) and a positive relationship in P. alpina (P = 0.07). Year and season were also found to affect the relative growth rates of most species (P < 0.05). These findings agree with previous northern hemisphere ITEX and other warming experiment results; that is, warming has a positive effect on species’ growth responses. In the present study, it is likely that continued climate warming may result in positive growth responses in other subalpine species across growth forms. Our findings emphasise the value of examining multiple species in climate-change studies.


Acknowledgements

This research was funded through an Australian Research Council Linkage Grant (LP0348897), the Department of Sustainability and Environment, Parks Victoria, CSIRO, ESLink Services Pty Ltd, and Mt Hotham Resort Management. We would like to thank Carolyn Blomley, Cherie Campbell, Deborah Cargill, Katherine Giljohann, Danielle Ryan, Paul Smart, Clare Warren and Emma Warren for their assistance in collecting field data. We would also like to thank Warwick Papst for his role in facilitating the ITEX project, Dr Sama Low Choy for statistical advice, and reviewers for comments on this manuscript.


References


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, Levesque E, Marion GM, Molau U, Mølgaard P, Nordenhall U, Raszhivin V, Robinson CH, Starr G, Stenström A, Stenström M, Totland Ø, Turner PL, Walker LJ, Webber PJ, Welker JM, Wookey PA (1999) Responses of tundra plants to experimental warming: meta-analysis of the International Tundra Experiment. Ecological Monographs 69, 491–511. open url image1

Australian Bureau of Meteorology (2005) ‘Climatological summary using data from Falls Creek 1990–2005.’ Commonwealth of Australia, Prepared by Climate and Consultancy Section in the Victorian Regional Office of the Bureau of Meteorology, Canberra.

Bear R, Pickering CM (2006) Recovery of subalpine grasslands from bushfire. Australian Journal of Botany 54, 451–458.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Billings WD, Mooney HA (1968) The ecology of arctic and alpine plants. Biological Reviews of the Cambridge Philosophical Society 43, 481–529.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Byars SG, Papst WA, Hoffmann AA (2007) Local adaptation and co-gradient selection in the alpine plant, Poa hiemata, along a narrow altitudinal gradient. Evolution 61, 2925–2941.
| Crossref | GoogleScholarGoogle Scholar | PubMed | open url image1

Chapin FS, Shaver GR (1985) Individualistic growth response of tundra plant species to environmental manipulations in the field. Ecology 66, 564–576.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Chapin FS, Shaver GR (1996) Physiological and growth responses of arctic plants to a field experiment simulating climatic change. Ecology 77, 822–840.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Costin AB (1967) Alpine ecosystems of the Australasian region. In ‘Arctic and alpine environments’. (Eds HE Wright, WH Osburn) pp. 57–87. (Indiana University Press: Bloomington)

Day TA, Ruhland CT, Grobe CW, Xiong F (1999) Growth and reproduction of Antarctic vascular plants in response to warming and UV radiation reductions in the field. Oecologia 119, 24–35.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Harte J, Shaw R (1995) Shifting dominance within a montane vegetation community: results of a climate-warming experiment. Science 267, 876–880.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed | open url image1

Hennessy KJ , Lucas C , Nicholls N , Bathols J , Suppiah R , Ricketts J (2005) ‘Climate change impacts on fire-weather in south east Australia.’ CSIRO, Aspendale.

Hennessy KJ , Whetton PH , Smith I , Bathols J , Hutchinson M , Sharples J (2003) ‘The impact of climate change on snow conditions in mainland Australia.’ CSIRO, Aspendale.

Henry GHR, Molau U (1997) Tundra plants and climate change: the International Tundra Experiment (ITEX). Global Change Biology 3, 1–9.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Hollister RD, Webber PJ, Bay C (2005) Plant response to temperature in northern Alaska: implications for predicting vegetation change. Ecology 86, 1562–1570.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Jarrad FC, Wahren C-H, Williams RJ, Burgman MA (2008) Impacts of experimental warming and fire on phenology of subalpine open-heath species. Australian Journal of Botany 56, 617–629.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Jones MH, Bay C, Nordenhall U (1997) Effects of experimental warming on arctic willows (Salix spp.): a comparison of responses from the Canadian high arctic, Alaskan arctic, and Swedish subarctic. Global Change Biology 3, 55–60.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Kirkpatrick JB, Dickinson KJM (1984) The impact of fire on Tasmanian alpine vegetation and soils. Australian Journal of Botany 32, 613–629.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Körner C (1989) The nutritional status of plants from high altitudes – a worldwide comparison. Oecologia 81, 379–391. open url image1

Körner C (1999) Growth dynamics and phenology. In ‘Alpine plant life’. pp. 221–233. (Springer: New York)

Kudo G, Suzuki S (2003) Warming effects on growth, production, and vegetation structure of alpine shrubs: a five-year experiment in northern Japan. Oecologia 135, 280–287.
| PubMed |
open url image1

Leigh JH, Wimbush DJ, Wood DH, Holgate MD, Slee AV, Stanger AG, Forrester RI (1987) Effects of rabbit grazing and fire on a subalpine environment. I. Herbaceous and shrubby vegetation. Australian Journal of Botany 35, 433–464.
| Crossref | GoogleScholarGoogle Scholar | open url image1

McDougall K, Walsh NE (2007) Treeless vegetation of the Australian Alps. Cunninghamia 10, 1–57. open url image1

Molau U (2001) Tundra plant responses to experimental and natural temperature changes. Memoirs of National Institute of Polar Research 54, 445–466. open url image1

Molau U , Mølgaard P (1996) (Eds) ‘ITEX Manual.’ (Danish Polar Center: Copenhagen)

Mølgaard P, Christensen K (1997) Response to experimental warming in a population of Papaver radicatum in Greenland. Global Change Biology 3, 116–124.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Nyléhn J, Totland Ø (1999) Effects of temperature and natural disturbance on growth, reproduction, and population density in the alpine annual hemiparasite Euphrasia frigida. Arctic, Antarctic, and Alpine Research 31, 259–263.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Osbourne WS , Davis MS , Green K (1998) Temporal and spatial variation in snow cover. In ‘Snow: a natural history, an uncertain future’. (Ed. K Green) pp. 56–68. (Surrey Beattie and Sons: Sydney)

Pinheiro JC , Bates DM (2000) ‘Mixed-effects models in S and S-PLUS.’ (Springer-Verlag: New York)

R Development Core Team (2009) ‘R: A language and environment for statistical computing.’ (R Foundation for Statistical Computing: Vienna, Austria)

Raison RJ (1979) Modification of the soil environment by vegetation fires, with particular reference to nitrogen transformations: a review. Plant and Soil 51, 73–108.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Rathcke B, Lacey EP (1985) Phenological patterns of terrestrial plants. Annual Review of Ecology and Systematics 16, 179–214.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Sakamoto Y , Ishiguro M , Kitagawa G (1986) ‘Akaike Information Criterion statistics.’ (Reidel: Dordrecht, Holland)

Suppiah R , Whetton PH , Watterson IG (2004) ‘Climate change in Victoria: assessment of climate change for Victoria: 2001–2002.’ CSIRO and Department of Natural Resources and Environment, Aspendale.

Tapper N (1999) Atmospheric issues for fire management in eastern Indonesia and northern Australia. In ‘Proceedings from Fire and sustainable agriculture and forestry development in eastern Indonesia and northern Australia’. Northern Territory University. pp. 21–30. (Australian Centre for International Agricultural Research)

Tolsma AD, Read SM, Tolhurst KG (2007) Roots of Australian alpine plant species contain high levels of stored carbohydrates independent of post-fire regeneration strategy. Australian Journal of Botany 55, 771–779.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Venables WN , Ripley BD (2002) ‘Modern applied statistics with S.’ (Springer: New York)

Venn SE, Morgan JW (2007) Phytomass and phenology of three alpine snowpatch species across a natural snowmelt gradient. Australian Journal of Botany 55, 450–456.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Wada N, Shimono M, Miyamoto M, Kojima S (2002) Warming effects on shoot developmental growth and biomass production in sympatric evergreen alpine dwarf shrubs Empetrum nigrum and Loiseleuria procumbens. Ecological Research 17, 125–132.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Wahren C-HA , Papst WA , Williams RJ (1999) Post-fire regeneration in Victorian alpine and subalpine vegetation. In ‘Australian Bushfire Conference’. Albury. pp. 425–430. (Charles Sturt University)

Wahren C-HA, Papst WA, Williams RJ (2001) Early post-fire regeneration in subalpine heathland and grassland in the Victorian Alpine National Park, south eastern Australia. Austral Ecology 26, 670–679.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Wahren C-HA, Walker MD, Bret-Harte MS (2005) Vegetation responses in Alaskan arctic tundra after 8 years of summer warming and winter snow manipulation experiment. Global Change Biology 11, 537–552.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Walker MD, Wahren C-HA, Hollister RD, Henry G, Ahlquist LE, Alatalo JM, Bret-Harte MS, Calef MP, Callaghan TV, Carroll AB, Epstein HE, Jónsdóttir IS, Klein JA, Magnússon B, Molau U, Oberbauer SF, Rewa SP, Robinson CH, Shaver GR, Suding KN, Thompson CC, Tolvanen A, Totland Ø, Turner PL, Tweedie CE, Webber PJ, Wookey PA (2006) Plant community responses to experimental warming across the tundra biome. Proceedings of the National Academy of Sciences of the United States of America 103, 1342–1346.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed | open url image1

Walsh NE, McDougall K (2004) Progress in the recovery of the flora of treeless subalpine vegetation in Kosciuszko National Park after the 2003 fires. Cunninghamia 8, 439–452. open url image1

Wearne LJ, Morgan JW (2001) Recent forest encroachment into subalpine grasslands near Mount Hotham, Victoria, Australia. Arctic, Antarctic, and Alpine Research 33, 369–377.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Welker JM, Molau U, Parsons AN, Robinson CH, Wookey PA (1997) Responses of Dryas octopetala to ITEX environmental manipulations: a synthesis with circumpolar comparisons. Global Change Biology 3, 61–73.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Whetton PH , Suppiah R , McInnes KL , Hennessy KJ , Jones RN (2002) ‘Climate change in Victoria: high resolution regional assessment of climate change impacts.’ CSIRO and Department of Natural Resources and Environment, Aspendale.

Wielgolaski FE (2001) Starting dates and basic temperatures in phenological observations of plants. International Journal of Biometeorology 45, 196–202.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed | open url image1

Wielgolaski FE (2003) Climatic factors governing plant phenological phases along a Norwegian fjord. International Journal of Biometeorology 47, 213–220.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed | open url image1

Williams AA, Karoly DJ, Tapper N (2001) The sensitivity of Australian fire danger to climate change. Climatic Change 49, 171–191.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Williams RJ , Costin AB (1994) Alpine and subalpine vegetation. In ‘Australian vegetation’. (Ed. RH Groves) pp. 467–500. (Cambridge University Press: Melbourne)

Williams RJ, Wahren C-H, Bradstock RA, Müller WJ (2006) Does alpine grazing reduce blazing? A landscape test of a widely held hypothesis. Austral Ecology 31, 925–936.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Williams RJ, Wahren C-HA, Tolsma A, Sanecki GA, Papst WA, Myers BA, McDougall KL, Heinze DA, Green K (2008) Large fires in Australian alpine landscapes: their part in the historical fire regime and their impacts on alpine biodiversity. International Journal of Wildland Fire 17, 793–808.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Woodward FI, Körner C, Crabtree RC (1986) The dynamics of leaf extension in plants with diverse altitudinal ranges. 1. Field observations on temperature responses at one altitude. Oecologia 70, 222–226.
| Crossref | GoogleScholarGoogle Scholar | open url image1