Polar Biology

, Volume 36, Issue 1, pp 127–136 | Cite as

Changes in the cover of plant species associated with climate change and grazing pressure on the Macquarie Island coastal slopes, 1980–2009

Original Paper

Abstract

Climate change and alien species have affected the vegetation of subantarctic islands. Long-term monitoring of vegetation change on the steep coastal slopes of subantarctic Macquarie Island has allowed responses of plant species to various disturbance regimes to be well documented, although, until recently, the confounding effect of feral herbivore disturbance obscured any responses that might be attributed to climate change. The uncoupling of climate change from variation in feral rabbit numbers allowed us to test whether any plant species were increasing or decreasing on the coastal slopes of the island between 1980 and 2009, independent of rabbit grazing pressure. We used analysis of variance to test for differences in species cover classes between four measurement times on each of 101 quadrats in each of 1980/1981, 1995, 2003 and 2009. We had 54 quadrats on landslips and 47 elsewhere. Approximately two-thirds of the species with significant temporal change exhibited changes that could be expected from variation in rabbit grazing pressure. However, approximately one-third of the species increased in cover irrespective of grazing pressure. On landslips, variation in the cover of these increaser species was largely related to time in a linear mixed model, whereas elsewhere altitude and time were both important. The increase in both atmospheric dryness and episodic soil water-logging that has been described for the island since 1980 may best explain the increaser species.

Keywords

Subantarctic Vegetation disturbance Long-term monitoring Rabbit grazing Climate change 

Notes

Acknowledgments

We thank the Tasmanian Parks and Wildlife Service for permission to visit the island, and the Australian Antarctic Division for project and logistic support and for funding assistance under ASAC Project 2137, over the many years of visits for this project. Thanks to those who helped JJS in the field on various occasions and discussed at length the issues of rabbits and vegetation, and to all the Parks rangers who have taken part in the photo-monitoring work.

References

  1. Adams N (2009) Climate trends at Macquarie Island and expectations of future climate change in the sub-antarctic. Pap Proc R Soc Tasman 143:1–8Google Scholar
  2. Ashton DH (1965) Regeneration pattern of Poa foliosa Hook.f. on Macquarie Island. Proc R Soc Vic 79:215–233Google Scholar
  3. Bergstrom DM, Lucieer A, Kiefer K, Wasley J, Belbin L, Pederson TK, Chown SL (2009) Indirect effects of invasive species removal devastate world heritage island. J Appl Ecol 46:73–81CrossRefGoogle Scholar
  4. Bolker BM, Brooks ME, Clark CJ, Geange SW, Poulsen JR, Stevens MHH, White J-SS (2009) Generalized linear mixed models: a practical guide for ecology and evolution. Trends Ecol Evol 24:127–135PubMedCrossRefGoogle Scholar
  5. Brothers N, Bone C (2008) The response of burrow-nesting petrels and other vulnerable bird species to vertebrate management and climate change on sub-antarctic Macquarie Island. Pap Proc R Soc Tasman 142:123–148Google Scholar
  6. Brothers NP, Eberhard IE, Copson GR, Skira IJ (1982) Control of rabbits on Macquarie Island by myxomatosis. Aust Wildl Res 9:477–485CrossRefGoogle Scholar
  7. Chapuis J-L, Frenot Y, Lebouvier M (2004) Recovery of native plant communities after eradication of rabbits from the subantarctic Kerguelen Islands, and influence of climate change. Biol Conserv 117:167–179CrossRefGoogle Scholar
  8. Copson GR (1984) An annotated atlas of the vascular flora of Macquarie Island. ANARE Research Notes 18, Antarctic Division, Department of Science and Technology, AustraliaGoogle Scholar
  9. Copson GR (1986) The diet of the introduced rodents Mus musculus L. and Rattus rattus L. on subantarctic Macquarie Island. Aust Wildl Res 13:441–445CrossRefGoogle Scholar
  10. Copson GR, Whinam J (1998) Response of vegetation on subantarctic Macquarie Island to reduced rabbit grazing. Aust J Bot 46:15–24CrossRefGoogle Scholar
  11. Copson GR, Whinam J (2001) Review of ecological restoration programme on subantarctic Macquarie Island: pest management progress and future directions. Ecol Manag Restor 2:129–138CrossRefGoogle Scholar
  12. Copson GR, Brothers NP, Skira IJ (1981) Distribution and abundance of the rabbit, Oryctolagus cuniculus (L.), at subantarctic Macquarie Island. Aust Wildl Res 8:597–611CrossRefGoogle Scholar
  13. Costin AB, Moore DM (1960) The effects of rabbit grazing on the grasslands of Macquarie Island. J Ecol 48:729–732CrossRefGoogle Scholar
  14. Cumpston JS (1968) Macquarie Island. ANARE scientific reports, series A (1), Narrative, Melbourne: Antarctic Division, Department of External Affairs, AustraliaGoogle Scholar
  15. Frenot Y, Chown SL, Whinam J, Selkirk PM, Convey P, Skotnicki M, Bergstrom DM (2005) Biological invasions in the Antarctic: extent, impacts and implications. Biol Rev 80:45–72PubMedCrossRefGoogle Scholar
  16. George AS, Orchard AE, Hewson HJ (1993) Flora of Australia. Volume 50, Oceanic Islands, 2, Subantarctic Islands, Australian Government Publishing Service, Canberra, AustraliaGoogle Scholar
  17. Gillham ME (1961) Modification of sub-antarctic flora on Macquarie Island by sea birds and sea elephants. Proc R Soc Vic 74:1–12Google Scholar
  18. Hamilton A (1894) Notes on a visit to Macquarie Island. Trans R Soc NZ 27:559–579Google Scholar
  19. Hindell MA, Bradshaw CJA, Brook BW, Fordham DA, Kerry K, Hull C, McMahon CR (2012) Long-term breeding phenology shift in royal penguins. Ecol Evol. doi: 10.1002/ece3.281
  20. Jones TD, McCue KF (1988) The seismicity and tectonics of the Macquarie Ridge. Pap Proc R Soc Tasman 122:51–57Google Scholar
  21. Kirkpatrick JB (2009) The importance of integrating science and management: lessons from terrestrial vegetation change on Macquarie and Heard Islands. Pap Proc R Soc Tasman 143:25–32Google Scholar
  22. Kirkpatrick JB, Scott JJ (2002) Change in undisturbed vegetation on the coastal slopes of Subantarctic Macquarie Island 1980–1995. Arct Antarct Alp Res 34:300–307CrossRefGoogle Scholar
  23. Le Roux PC, McGeoch MA (2008) Changes in climate extremes, variability and signature on sub-Antarctic Marion Island. Clim Chang 86:309–329CrossRefGoogle Scholar
  24. Lebouvier M, Laparie M, Hullé M, Marais A, Cozic Y, Lalouette L, Vernon P, Candresse T, Frenot Y, Renault D (2011) The significance of the sub-Antarctic Kerguelen Islands for the assessment of the vulnerability of native communities to climate change, alien insect invasions and plant viruses. Biol Invasions 13:1195–1208CrossRefGoogle Scholar
  25. Leigh JH, Wimbush DJ, Wood DH, Holgate MD, Slee AV, Stanger MG, Forrester RI (1987) Effects of rabbit grazing and fire on a subalpine environment I: herbaceous and shrubby vegetation. Aust J Bot 35:433–464CrossRefGoogle Scholar
  26. McGlone M, Wilmshurst J, Meurck C (2007) Climate, fire, farming and the recent vegetation history of subantarctic Campbell Island. Earth Environ Sci Trans R Soc Edinb 98:71–84Google Scholar
  27. Pendlebury SF, Barnes-Keoghan IP (2007) Climate and climate change in the sub-Antarctic. Pap Proc R Soc Tasman 141:67–82Google Scholar
  28. PWS (2006) Macquarie Island Nature Reserve and World Heritage Area management plan. Parks and Wildlife Service, Department of Tourism, Arts and the Environment, Hobart. http://www.parks.tas.gov.au/file.aspx?id=6609. Accessed 5 Dec 2011
  29. PWS (2007) Macquarie Island pest eradication plan—part A: overview. Parks and Wildlife Service, March 2007. Department of Environment, Parks, Heritage and the Arts, Tasmania, and Department of the Environment, Water, Heritage and the Arts, Commonwealth of Australia. http://www.parks.tas.gov.au/file.aspx?id=6743. Accessed 5 Dec 2011
  30. Scott JH (1882) Macquarie Island. Trans R Soc NZ 15:484–493Google Scholar
  31. Scott JJ (1985) Effects of feral rabbits on the revegetation of disturbed coastal slope sites, Macquarie Island. Master of Arts dissertation, Monash University, Melbourne, AustraliaGoogle Scholar
  32. Scott JJ (1988) Rabbit distribution history and related land disturbance, Macquarie Island. Pap Proc R Soc Tasman 122:255–266Google Scholar
  33. Scott JJ (1995) Changes in vegetation on Macquarie Island coastal slopes, 1980–1990. PhD dissertation, University of Tasmania, Hobart, AustraliaGoogle Scholar
  34. Scott JJ, Bergstrom DM (2005) Vegetation of Heard and McDonald Islands. In: Green K, Woehler EJ (eds) Heard Island: southern ocean sentinel. Surrey Beatty and Sons, Sydney, pp 69–90Google Scholar
  35. Scott JJ, Kirkpatrick JB (2008) Rabbits, landslips and vegetation change on the coastal slopes of subantarctic Macquarie Island, 1980–2007—implications for management. Polar Biol 31:409–419CrossRefGoogle Scholar
  36. Selkirk JM (1996) Peat slides on subantarctic Macquarie Island. Zeit Geomorph 105:61–72Google Scholar
  37. Selkirk PM, Seppelt RD, Selkirk DR (1990) Subantarctic Macquarie Island: environment and biology. Cambridge University Press, CambridgeGoogle Scholar
  38. Seppelt RD (2004) The moss flora of Macquarie Island. Australian Antarctic Division, Commonwealth of AustraliaGoogle Scholar
  39. Shaw JD, Hovenden MJ, Bergstrom DM (2005) The impact of introduced ship rats (Rattus rattus) on seedling recruitment and distribution of a subantarctic megaherb (Pleurophyllum hookeri). Austral Ecol 30:118–125CrossRefGoogle Scholar
  40. Shaw J, Terauds A, Bergstrom D (2011) Rapid commencement of ecosystem recovery following aerial baiting on sub-Antarctic Macquarie Island. Ecol Manag Restor 12:241–244CrossRefGoogle Scholar
  41. Taylor BW (1955) The flora, vegetation and soils of Macquarie Island. ANARE Scientific Reports, series B (2), Antarctic Division, Department of External Affairs, AustraliaGoogle Scholar
  42. Terauds A (2009) Changes in rabbit numbers on Macquarie Island 1974–2008. Report to Tasmanian Parks and Wildlife Service, Feb 2009Google Scholar
  43. Thost D, Allison I (2005) The climate of Heard Island. In: Green K, Woehler EJ (eds) Heard Island: southern ocean sentinel. Surrey Beatty and Sons, Sydney, pp 52–68Google Scholar
  44. Tweedie C, Bergstrom DM (2000) A climate change scenario for surface air temperature at subantarctic Macquarie Island. In: Davison W, Howard-Williams C, Broady P (eds) Antarctic ecosystems: models for wider ecological understanding. Caxton Press, New Zealand, pp 272–281Google Scholar
  45. Whinam J, Copson GR (2006) Sphagnum moss: an indicator of climate change in the sub-Antarctic. Polar Rec 42:43–49CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  1. 1.School of Geography and Environmental StudiesUniversity of TasmaniaHobartAustralia

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