Climatic Change

, Volume 86, Issue 3–4, pp 309–329 | Cite as

Changes in climate extremes, variability and signature on sub-Antarctic Marion Island

  • Peter C. le Roux
  • Melodie A. McGeoch


The ecological consequences of climate change are determined by many climate parameters, not just by the commonly investigated changes in mean temperature and rainfall. More comprehensive studies, including analyses of climate variability, extremes and aggregate changes in the climate system, can improve the understanding of the nature, and therefore possible consequences, of recent changes in climate. Here climate trends on the sub-Antarctic Marion Island are documented (between 1949 and 2003) in more detail than previously. Significant trends in biologically-relevant, and previously unexplored, parameters were observed, and the potential ecological consequences of these changes discussed. For example, the decline in precipitation experienced on the island comprises a trend for longer dry spells punctuated by fewer and smaller precipitation events. This more detailed understanding of the island’s drying trends enables more accurate predictions about its impacts, including, for example, particularly severe effects on plant species growing in soils with poor water-holding capacity. Therefore, in addition to changes in average conditions, more inclusive climate analyses should also examine trends in climatic variability and extremes, for individual climate parameters as well as for the climate system as a whole.


Wind Speed Climate Parameter Glob Chang Biol Prince Edward Island Daily Temperature Range 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. Anonymous (2001) Wind chill temperature index. National Weather Service, Silver Springs, p 4Google Scholar
  2. Arft AM, Walker MD, Gurevitch J, Alatalo JM, Bret-Harte MS, Dale M, Diemer M, Gugerli F, Henry GHR, Jones MH, Hollister RD et al. (1999) Responses of tundra plants to experimental warming: meta-analysis of the international tundra experiment. Ecol Monogr 69:491–511Google Scholar
  3. Ashton DH, Gill AM (1965) Pattern and process in a Macquarie Island feldmark. Proc R Soc Vic 79:235–245Google Scholar
  4. Avenant NL, Smith VR (2003) The microenvironment of house mice on Marion Island (sub-Antarctic). Polar Biol 26:129–141Google Scholar
  5. Bannister P, Maegli T, Dickinson KJM, Halloy SRP, Knight A, Lord JM, Mark AF, Spencer KL (2005) Will loss of snow cover during climatic warming expose New Zealand alpine plants to increased frost damage? Oecologia 144:245–256Google Scholar
  6. Bate GC, Smith VR (1983) Photosynthesis and respiration in the sub-Antarctic tussock grass Poa cookii. New Phytol 95:533–543Google Scholar
  7. Benedetti-Cecchi L (2003) The importance of the variance around the mean effect size of ecological processes. Ecology 84:2335–2346Google Scholar
  8. Berjak P (1979) The Marion Island Flora – Tillaea moschata Dc. from fresh- and salt-water situations. Proc Electron Micros Soc S Afr 9:69–70Google Scholar
  9. Boelhouwers J, Holness S, Sumner P (2003) The maritime sub-Antarctic: a distinct periglacial environment. Geomorphology 52:39–55Google Scholar
  10. Bonan G (2002) Ecological climatology. Cambridge University Press, Cambridge, p 690Google Scholar
  11. Bruce P, Simon J, Oswald T (1999) Resampling stats: user’s guide. Resampling Stats, Arlington, VAGoogle Scholar
  12. Büßer C, Kahles A, Quillfeldt P (2004) Breeding success and chick provisioning in Wilson’s storm-petrels Oceanites oceanicus over seven years: frequent failures due to food shortage and entombment. Polar Biol 27:613–622Google Scholar
  13. Callaghan TV, Carlsson BÅ (1997) Impacts of climate change on demographic processes and population dynamics in arctic plants. In Oechel WC, Callaghan TV, Gilmanov T, Holten JI, Maxwell B, Molau U, Sveinbjörnsson B (eds) Global change and arctic terrestrial ecosystems. Springer, New York, pp 129–152Google Scholar
  14. Camarero JJ, Gutiérrez E (2004) Pace and pattern of recent treeline dynamics: response of ecotones to climatic variability in the Spanish Pyrenees. Clim Change 63:181–200Google Scholar
  15. Chapin FS III, Shaver GR (1985) Individualistic growth response of tundra plant species to environmental manipulations in the field. Ecology 66:564–576Google Scholar
  16. 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 117:167–179Google Scholar
  17. Chapuis JL, Hennion F, le Roux V, le Cuziat J (2000) Growth and reproduction of the endemic cruciferous species Pringlea antiscorbutica in Kerguelen Islands. Polar Biol 23:196–204Google Scholar
  18. Chown SL (2001) Physiological variation in insects: hierarchical levels and implications. J Insect Physiol 47:649–660Google Scholar
  19. Chown SL, Crafford JE (1992) Microhabitat temperatures at Marion Island (46°54′S 37°45′E). S Afr J Antarct Res 22:51–58Google Scholar
  20. Chown SL, Smith VR (1993) Climate change and the short-term impact of feral house mice at the sub-Antarctic Prince Edward Islands. Oecologia 96:508–516Google Scholar
  21. Cook GD, Heerdegen RG (2001) Spatial variation in the duration of the rainy season in monsoonal Australia. Int J Climatol 21:1723–1732Google Scholar
  22. Cook GD, Williams RJ, Hutley LB, O’Grady AP, Liedloff AC (2002) Variation in vegetative water use in the Savannas of the North Australian tropical transect. J Veg Sci 13:413–418Google Scholar
  23. Cooper J, Lutjeharms JRE (1992) Correlations between seabird breeding success and meteorological conditions on Marion and Gough Islands. S Afr J Sci 88:173–175Google Scholar
  24. Crafford JE, Scholtz CH, Chown SL (1986) The insects of sub-Antarctic Marion and Prince Edward Islands; with a bibliography of entomology of the Kerguelen biogeographical province. S Afr J Antarct Res 16:42–84Google Scholar
  25. Crawford RJM, Rae CMD, Nel DC, Cooper J (2003) Unusual breeding by seabirds at Marion Island during 1997/98. Afr J Mar Sci 25:453–462Google Scholar
  26. Dormann CF, Woodin SJ (2002) Climate change in the Arctic: using plant functional types in a meta-analysis of field experiments. Func Ecol 16:4–17Google Scholar
  27. Drake JM (2005) Population effects of increased climate variation. Proc R Soc Lond B 272:1823–1827Google Scholar
  28. Easterling DR, Evans JL, Groisman PY, Karl TR, Kunkel KE, Ambenje P (2000a) Observed variability and trends in extreme climate events: A brief review. Bull Am Meteorol Soc 81:417–425Google Scholar
  29. Easterling DR, Meehl GA, Parmesan C, Changnon SA, Karl TR, Mearns LO (2000b) Climate extremes: observations, modeling, and impacts. Science 289:2068–2074Google Scholar
  30. Elagib NA, Mansell MG (2000) Recent trends and anomalies in mean seasonal and annual temperatures over Sudan. J Arid Environ 45:263–288Google Scholar
  31. Ennos AR (1997) Wind as an ecological factor. Trends Ecol Evol 12:108–111Google Scholar
  32. Fay PA, Carlisle JD, Danner BT, Lett MS, McCarron JK, Steward K, Knapp AK, Blair JM, Collins SL (2002) Altered rainfall patterns, gas exchange, and growth in grasses and forbs. Int J Plant Sci 163:549–557Google Scholar
  33. Forchhammer MC, Post E (2004) Using large-scale climate indices in climate change ecology studies. Popul Ecol 46:1–12Google Scholar
  34. Frenot Y, Gloaguen J-C, Tréhen P (1997) Climate change in Kerguelen Islands and colonization of recently deglaciated areas by Poa kerguelensis and P. annua. In Battaglia B, Valencia J, Walton D (eds) Antarctic communities: species, structure and survival. Cambridge University Press, Cambridge, pp 358–366Google Scholar
  35. Gaines SD, Denny MW (1993) The largest, smallest, highest, lowest, longest, and shortest: extremes in ecology. Ecology 74:1677–1692Google Scholar
  36. García LV (2004) Escaping the bonferroni iron claw in ecological studies. Oikos 105:657–663Google Scholar
  37. Goldberg SM (2004) Factors influencing the distribution of an alien invasive slug Deroceras caruanae (Gastropoda: Limacidae) on Marion Island, B.Sc. (Honours). Dissertation, University of Stellenbosch, Stellenbosch, p 28Google Scholar
  38. Good PI (1999) Resampling methods: a practical guide to data analysis. 2nd ed. Birkhäuser, Boston, p 270Google Scholar
  39. Grace J (1977) Plant response to wind. Academic, London, p 204Google Scholar
  40. Gutschick VP, BassiriRad H (2003) Extreme events as shaping physiology, ecology, and evolution of plants: toward a unified definition and evaluation of their consequences. New Phytol 160:21–42Google Scholar
  41. Hallett TB, Coulson T, Pilkington JG, Clutton-Brock TH, Pemberton JM, Grenfell BT (2004) Why large-scale climate indices seem to predict ecological processes better than local weather. Nature 430:71–75Google Scholar
  42. Hänel C, Chown SL (1998) An introductory guide to the Marion and Prince Edward Island special nature reserves. Department of Environmental Affairs and Tourism, Pretoria, p 80Google Scholar
  43. Hayward SAL, Worland MR, Convey P, Bale JS (2003) Temperature preferences of the mite, Alaskozetes antarcticus, and the Collembolan, Cryptopygus antarcticus from the maritime Antarctic. Physiol Entomol 28:114–121Google Scholar
  44. Heilbronn TD, Walton DWH (1984) Plant colonization of actively sorted stone stripes in the subantarctic. Arct Alp Res 16:161–172Google Scholar
  45. Helmuth B, Harley CDG, Halpin PM, O’Donnell M, Hofmann GE, Blanchette CA (2002) Climate change and latitudinal patterns of intertidal thermal stress. Science 298:1015–1018Google Scholar
  46. Helmuth B, Kingsolver JG, Carrington E (2005) Biophysics, physiological ecology, and climate change: does mechanism matter? Annu Rev Physiol 67:177–201Google Scholar
  47. Helmuth BST, Hofmann GE (2001) Microhabitats, thermal heterogeneity, and patterns of physiological stress in the rocky intertidal zone. Biol Bull 201:374–384Google Scholar
  48. Hodkinson ID, Webb NR, Bale JS, Block W (1999) Hydrology, water availability and tundra ecosystem function in a changing climate: the need for a closer integration of ideas. Glob Chang Biol 5:359–369Google Scholar
  49. Holness S (2001) The orientation of sorted striped in the maritime subantarctic, Marion Island. Earth Surf Process Landf 26:77–89Google Scholar
  50. Holness SD (2004) Sediment movement rates and processes on cinder cones in the maritime subantarctic (Marion Island). Earth Surf Process Landf 29:91–103Google Scholar
  51. Hughes L (2000) Biological consequences of global warming: is the signal already apparent. Trends Ecol Evol 15:56–61Google Scholar
  52. Hugo EA, McGeoch MA, Marshall DJ, Chown SL (2004) Fine scale variation in microarthropod communities inhabiting the keystone species Azorella selago on Marion Island. Polar Biol 27:466–473Google Scholar
  53. Hummel I, Quemmerais F, Gouesbet G, El Amrani A, Frenot Y, Hennion F, Couée I (2004) Characterization of environmental stress responses during early development of Pringlea antiscorbutica in the field at Kerguelen. New Phytol 162:705–715Google Scholar
  54. Huntley B (1991) How plants respond to climate change – migration rates, individualism and the consequences for plant communities. Ann Bot 67 (Suppl. 1):15–22Google Scholar
  55. Huntley BJ (1970) Altitudinal distribution and phenology of Marion Island vascular plants. Tydskr Natuurwet 10:255–262Google Scholar
  56. Huntley BJ (1971) Vegetation. In van Zinderen Bakker EM, Sr, Winterbottom JM, Dyer RA (eds), Marion and Prince Edward Islands: report on the South African biological and geological expeditions, 1965–1966. A.A. Balkema, Cape Town, pp 98–160Google Scholar
  57. Huntley BJ (1972) Notes on the ecology of Azorella selago Hook. F. J S Afr Bot 38:103–113Google Scholar
  58. Huth R, Pokorná L (2005) Simultaneous analysis of climatic trends in multiple variables: an example of application of multivariate statistical methods. Int J Climatol 25:469–484Google Scholar
  59. Huyser O, Ryan PG, Cooper J (2000) Changes in population size, habitat use and breeding biology of lesser sheathbills (Chionis minor) at Marion Island: impacts of cats, mice and climate change. Biol Conserv 92:299–310Google Scholar
  60. Inouye DW (2000) The ecological and evolutionary significance of frost in the context of climate change. Ecol Lett 3:457–463Google Scholar
  61. Inouye DW, McGuire AD (1991) Effects of snowpack on timing and abundance of flowering in Delphinium nelsonii (Ranunculaceae): implications for climate change. Am J Bot 78:997–1001Google Scholar
  62. IPCC (2001) Intergovernmental panel on climate change working group I, Climate Change 2001: the scientific basis. Cambridge University Press, Cambridge, p 63Google Scholar
  63. Jonasson S (1986) Influence of frost heaving on soil chemistry and on the distribution of plant growth forms. Geogr Ann, A 68:185–195Google Scholar
  64. Karl TR, Jones PD, Knight RW, Kukla G, Plummer N, Razuvayev V, Gallo KP, Lindseay J, Charlson RJ, Peterson TC (1993) A new perspective on recent global warming – asymmetric trends of daily maximum and minimum temperature. Bull Am Meteorol Soc 74:1007–1023Google Scholar
  65. Karl TR, Knight RW, Easterling DR, Quayle RG (1996) Indices of climate change for the United States. Bull Am Meteorol Soc 77:279–292Google Scholar
  66. Katz RW, Brown BG (1992) Extreme events in a changing climate: variability is more important than averages. Clim Change 21:289–302Google Scholar
  67. Kingsford RT, Jenkins KM, Porter JL (2004) Imposed hydrological stability on lakes in arid Australia and effects on waterbirds. Ecology 85:2478–2492Google Scholar
  68. Klanderud K, Birks HJB (2003) Recent increases in species richness and shifts in altitudinal distributions of Norwegian mountain plants. Holocene 13:1–6Google Scholar
  69. Klein Tank AMG, Können GP (2003) Trends in indices of daily temperature and precipitation extremes in Europe, 1946–99. J Climate 16:3665–3680Google Scholar
  70. Klok CJ, Chown SL (1997) Critical thermal limits, temperature tolerance and water balance of a sub-Antarctic caterpillar, Pringleophaga marioni (Lepidoptera: Tineidae). J Insect Physiol 43:685–694Google Scholar
  71. Klok CJ, Chown SL (1998) Interactions between desiccation resistance, host-plant contact and the thermal biology of a leaf-dwelling sub-Antarctic caterpillar, Embryonopsis halticella (Lepidoptera: Yponomeutidae). J Insect Physiol 44:615–628Google Scholar
  72. Klok CJ, Chown SL (2001) Critical thermal limits, temperature tolerance and water balance of a sub-Antarctic kelp fly, Paractora dreuxi (Diptera: Helcomyzidae). J Insect Physiol 47:95–109Google Scholar
  73. Knapp AK, Fay PA, Blair JM, Collins SL, Smith MD, Carlisle JD, Harper CW, Danner BT, Lett MS, McCarron JK (2002) Rainfall variability, carbon cycling, and plant species diversity in a mesic grassland. Science 298:2202–2205Google Scholar
  74. Körner C (2003) Alpine plant life: Functional plant ecology of high mountain ecosystems, 2nd ed. Springer, Heidelberg, p 344Google Scholar
  75. le Roux PC (2004) Azorella selago (Apiaceae) as a model for examining climate change effects in the sub-Antarctic. M.Sc. thesis, University of Stellenbosch, Stellenbosch, p 145Google Scholar
  76. le Roux PC, McGeoch MA (2004) The use of size as an estimator of age in the sub-Antarctic cushion plant, Azorella selago (Apiaceae). Arc Antarct Alp Res 36:608–616Google Scholar
  77. le Roux PC, McGeoch MA, Nyakatya MJ, Chown SL (2005) Effects of simulated climate change on a keystone plant species in the Sub-Antarctic. Glob Chang Biol 11:1628–1639Google Scholar
  78. Legendre P, Legendre L (1998) Numerical ecology, 2nd ed. Elsevier, Amsterdam, p 853Google Scholar
  79. Lepš J, Šmilauer P (2003) Multivariate analysis of ecological data using canoco. Cambridge University Press, Cambridge, p269Google Scholar
  80. Lynch AJJ, Kirkpatrick JB (1995) Pattern and process in alpine vegetation and landforms at Hill One, Southern Range, Tasmania. Aust J Bot 43:537–554Google Scholar
  81. McCarthy JP (2001) Ecological consequences of recent climate change. Conserv Biol 15:320–331Google Scholar
  82. McGeoch MA, le Roux PC, Hugo EA, Chown SL (2006) Species and community responses to short-term climate manipulation: microarthropods in the sub-Antarctic. Aust Ecol 31:719–731Google Scholar
  83. McLaughlin JF, Hellmann JJ, Boggs CL, Ehrlich PR (2002) Climate change hastens population extinctions. P Natl Acad Sci U S A 99:6070–6074Google Scholar
  84. Meehl GA, Karl TR, Easterling DR, Changnon SA, Pielke R Jr, Changnon D, Evans J, Groisman PY, Knutson TR, Kunkel KE, Mearns LO, Parmesan C, Pulwarty R, Root TL, Sylves RT, Whetton P, Zwiers F (2000) An introduction to trends in extreme weather and climate events: observations, socioeconomic impacts, terrestrial ecological impacts, and model projections. Bull Am Meteorol Soc 81:413–416Google Scholar
  85. Mysterud A, Stenseth NC, Yocooz NG, Langvatn R (2001) Nonlinear effects of large-scale climatic variability on wild and domestic herbivores. Nature 410:1096–1099Google Scholar
  86. Nicholls N (2004) The changing nature of Australian droughts. Clim Change 63:323–336Google Scholar
  87. Norton LR, Firbank LG, Gray AJ, Watkinson AR (1999) Responses to elevated temperature and CO2 in the perennial grass Agrostis curtisii in relation to population origin. Func Ecol 13 (Suppl 1):9–37Google Scholar
  88. Nylehn J, Totland O (1999) Effects of temperature and natural disturbance on growth, reproduction, and population density in the alpine annual hemiparasite Euphrasia frigida. Arc Antarct Alp Res 31:259–263Google Scholar
  89. Ovadia O, Schmitz OJ (2004) Weather variation and trophic interaction strength: sorting the signal from the noise. Oecologia 140:398–406Google Scholar
  90. Pakhomov EA, McClelland JW, Bernard K, Kaehler S, Montoya JP (2004) Spatial and temporal shifts in stable isotope values of the bottom-dwelling shrimp Nauticaris marionis at the sub-Antarctic archipelago. Mar Biol 144:317–325Google Scholar
  91. Pammenter NW, Drennan PM, Smith VR (1986) Physiological and anatomical aspects of photosynthesis of two Agrostis species at a sub-Antarctic island. New Phytol 102:143–160Google Scholar
  92. Parmesan C (1996) Climate and species’ range. Nature 382:765–766Google Scholar
  93. Parmesan C, Root TL, Willig MR (2000) Impacts of extreme weather and climate on terrestrial biota. Bull Am Meteorol Soc 81:443–450Google Scholar
  94. Peltola H, Kellomäki S, Väisänen H (1999) Model computations of the impact of climatic change on the windthrow risk of trees. Clim Change 41:17–36Google Scholar
  95. Peñuelas J, Boada M (2003) A global change-induced biome shift in the Montseny mountains (NE Spain). Glob Chang Biol 9:131–140Google Scholar
  96. Perry AL, Low PJ, Ellis JR, Reynolds JD (2005) Climate change and distribution shifts in marine fishes. Science 308:1912–1915Google Scholar
  97. Post E, Stenseth NC (1999) Climatic variability, plant phenology, and northern ungulates. Ecology 80:1322–1339CrossRefGoogle Scholar
  98. Pounds JA, Fogden MPL, Campbell JH (1999) Biological response to climate change on a tropical mountain. Nature 398:611–615Google Scholar
  99. Quinn GP, Keough MJ (2002) Experimental design and data analysis for biologists, 1st ed. Cambridge University Press, Cambridge, p 537Google Scholar
  100. Renault D, Nedved O, Hervant F, Vernon P (2004) The importance of fluctuating thermal regimes for repairing chill injuries in the tropical beetle Alphitobius diaperinus (Coleoptera: Tenebrionidae) during exposure to low temperature. Physiol Entomol 29:139–145Google Scholar
  101. Root TL, Price JT, Hall KR, Schneider SH, Rosenzweig C, Pounds JA (2003) Fingerprints of global warming on wild animals and plants. Nature 421:57–60Google Scholar
  102. Ruel JJ, Ayres MP (1999) Jensen’s inequality predicts effects of environmental variation. Trends Ecol Evol 14:361–366Google Scholar
  103. Saetersdal M, Birks HJB (1997) A comparative ecological study of Norwegian mountain plants in relation to possible future climatic change. J Biogeogr 24:127–152Google Scholar
  104. Schmidt KA (2004) Site fidelity in temporally correlated environments enhances population persistence. Ecol Lett 7:176–184Google Scholar
  105. Schulze BR (1971) The climate of Marion Island. In van Zinderen Bakker, EM Sr, Winterbottom JM, Dyer RA (eds), Marion and Prince Edward Islands: report on the South African biological and geological expeditions, 1965–1966. A.A. Balkema, Cape Town, pp 16–31Google Scholar
  106. Scott L (1985) Palynological indications of the quaternary vegetation history of Marion Island (sub-Antarctic). J Biogeogr 12:413–431Google Scholar
  107. Shaver GR, Canadell J, Chapin FS III, Gurevitch J, Harte J, Henry G, Ineson P, Jonasson S, Melillo JM, Pitelka L, Rustad LE (2000) Global warming and terrestrial ecosystems: a conceptual framework for analysis. Bioscience 50:871–882Google Scholar
  108. Sinclair BJ (2001) Field ecology of freeze tolerance: interannual variation in cooling rates, freeze-thaw and thermal stress in the microhabitat of the alpine cockroach Celatoblatta quinquemaculata. Oikos 93:286–293Google Scholar
  109. Sinclair BJ, Addo-Bediako A, Chown SL (2003) Climatic variability and the evolution of insect freeze tolerance. Biol Rev 78:181–195Google Scholar
  110. Sinclair BJ, Chown SL (2005) Deleterious effects of repeated cold exposure in a freeze-tolerant sub-Antarctic caterpillar. J Exp Biol 208:869–879Google Scholar
  111. Slabber S, Chown SL (2004) Thermal tolerance and cold hardiness strategy of the sub-Antarctic psocid Antarctopsocus jeanneli badonnel. Polar Biol 28:56–61Google Scholar
  112. Smith VR (2002) Climate change in the sub-Antarctic: an illustration from Marion Island. Clim Change 52:345–357Google Scholar
  113. Smith VR, Steenkamp M (1990) Climate change and its ecological implications at a sub-Antarctic island. Oecologia 85:14–24Google Scholar
  114. Smith VR, Steenkamp M (2001) Classification of the terrestrial habitats on Marion Island based on vegetation and soil chemistry. J Veg Sci 12:181–198Google Scholar
  115. Smith VR, Steenkamp M, Gremmen NJM (2001) Terrestrial habitats on sub-Antarctic Marion Island: their vegetation, edaphic attributes, distribution and response to climate change. S Afr J Bot 67:641–654Google Scholar
  116. Stenseth NC, Mysterud A (2002) Climate, changing phenology, and other life history traits: Nonlinearity and match–mismatch to the environment. Proc Natl Acad Sci U S A 99:13379–13381Google Scholar
  117. Stenseth NC, Mysterud A (2005) Weather packages: finding the right scale and composition of climate in ecology. J Anim Ecol 74:1195–1198Google Scholar
  118. Stenseth NC, Mysterud A, Ottersen G, Hurrell JW, Chan K-S, Lima M (2002) Ecological effects of climate fluctuations. Science 297:1292–1296Google Scholar
  119. Stireman JO III, Dyer LA, Janzen DH, Singer MS, Lill JT, Marquis RJ, Ricklefs RE, Gentry GL, Hallwachs W, Coley PD, Barone JA, Greeney HF, Connahs H, Barbosa P, Morais HC, Diniz IR (2005) Climatic unpredictability and parasitism of caterpillars: implications of global warming. Proc Natl Acad Sci U S A 102:17384–17387Google Scholar
  120. Taylor AR, Schroter D, Pflug A, Wolters V (2004) Response of different decomposer communities to the manipulation of moisture availability: potential effects of changing precipitation patterns. Glob Chang Biol 10:1313–1324Google Scholar
  121. Taylor BW (1955) The flora, vegetation and soils of Macquarie Island, Antarctic division. Department of External Affairs, Melbourne, p 192Google Scholar
  122. ter Braak CJF, Šmilauer P (2002) Canoco reference manual. Wageningen University and Research Centre, Wageningen, p 500Google Scholar
  123. Tweedie CE (2000) Climate change and the autecology of six plant species along an altitudinal gradient on sub-Antarctic Macquarie Island. Ph.D. thesis, University of Queensland, Brisbane, p 330Google Scholar
  124. Walther GR (2004) Plants in a warmer world. Perspect Plant Ecol 6:169–185Google Scholar
  125. Walther G-R, Post E, Convey P, Menzel A, Parmesan C, Beebee TJC, Fromentin J-M, Hoegh-Guldberg O, Bairlein F (2002) Ecological responses to recent climate change. Nature 416:389–395Google Scholar
  126. Warren Wilson J (1959) Notes on wind and its effects in Arctic-alpine vegetation. J Ecol 47:415–427Google Scholar
  127. Webster PJ, Holland GJ, Curry JA, Chang H-R (2005) Changes in tropical cyclone number, duration, and intensity in a warming environment. Science 309:1844–1846Google Scholar
  128. Weimerskirch H, Inchausti P, Guinet C, Barbraud C (2003) Trends in bird and seal populations as indicators of a system shift in the Southern Ocean. Antarct Sci 15:249–256Google Scholar
  129. Weltzin JF, Loik ME, Schwinning S, Williams DG, Fay PA, Haddad BM, Harte J, Huxman TE, Knapp AK, Lin G, Pockman WT, Shaw MR, Small EE, Smith MD, Smith SD, Tissue DT, Zak JC (2003) Assessing the response of terrestrial ecosystems to potential changes in precipitation. Bioscience 53:941–952Google Scholar
  130. Wichmann MC, Jeltsch F, Dean WRJ, Moloney KA, Wissel C (2003) Implication of climate change for the persistence of raptors in arid Savanna. Oikos 102:186–202Google Scholar
  131. Wolter K, Timlin MS (1998) Measuring the strength of ENSO – how does 1997/98 rank? Weather 53:315–324Google Scholar
  132. Xiao J, Moody A (2004) Photosynthetic activity of US biomes: Responses to the spatial variability and seasonality of precipitation and temperature. Glob Chang Biol 10:437–451Google Scholar

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© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  1. 1.Department of Conservation Ecology and EntomologyUniversity of StellenboschMatielandSouth Africa

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