Onset of Flowering in Biennial and Perennial Garden Plants

Association with Variable Weather and Changing Climate Between 1978 and 2007

  • F. T. Last University of Edinburgh
  • A. M.I Roberts Biomathematics and Statistics Scotland

Abstract

Observations were made weekly over a period of 30 years of 208 species (trees, shrubs, herbaceous plants and geophytes) from more than 1,000 growing in a garden located 18km east of the Royal Botanic Garden Edinburgh (RBGE), Scotland (lat. 55º 56ʹN: long. 3º 09ʹW). Of these species, 27 were British native or naturalised.
The First Flowering Dates (FFD) of 67 species were without significant temperature association with variable weather; the FFDs of the other 141 species reflected, in contrast, the net outcome of ‘major’ associations with late winter/spring temperatures and smaller impacts of autumn/early winter temperatures. Increases in late winter and spring temperatures advanced the onset of flowering in the current year; in contrast, increases in autumn and early winter temperatures tended to be associated with delayed flowering in the following year.
With stepwise regression, penalised signal regression and thermal-time models, it was possible to identify species with ‘strong’ associations with both air and soil temperatures and species with ‘weak’ associations with either air or soil temperatures.
Thermal-time models for each of 120 species, whose FFDs were associated with temperature, enabled the characterisation of (1) base temperatures, Tb(°C), at, and above which, development towards open flowers is possible; and (2) thermal constants (degree days accumulated between the start of development and the onset of flowering). Together these attributes suggested that each base temperature cohort has species with widely different degree-day requirements. Between 1978 and 2007 mean air temperatures significantly increased by 0.080°C, 0.044°C and 0.026°C yrˉ¹ in the first, second and third quarters; soil temperatures increased by 0.060ºCyrˉ¹in the first quarter. Over the 30-year period, the trends in flowering showed the early (February/March) flowering species flowering c. 24 days sooner; the later flowering species (April/May) advanced by only c. 12 days.

Author Biographies

F. T. Last, University of Edinburgh
Hon. Professor Institute of Ecology and Resource Management
A. M.I Roberts, Biomathematics and Statistics Scotland
External Development Manager

References

Abbot , D.L. (1971). Physiology of fruitset in apple. Effect of spring temperature. Report of Long Ashton Research Station for 1970, 30–31.

Bernier, G., Kinet, J.M. & Sachs, R.M. (1981). The Physiology of Flowering, Vol. 1. CRC Press, Boca Raton, FL.

Chuine, I., Cour, P. & Rousseau, D.D. (1998). Fitting models predicting dates of flowering of temperature-zone trees using simulated annealing. Plant Cell & Environment, 21, 455–466.

Chuine, I., Kramer, K. & Hänninen, H. (2003). Plant development models. In: Schwartz , M.D. (ed.). Phenology: An Integrative Environmental Science. Kluwer, Dordrecht, 217–235.

Commander, J. (ed.). (1982). Gilbert White’s Year, Passages from The Garden Kalendar and The Naturalist’s Journal. Oxford University Press, Oxford.

Draper, N.R. & Smith, H. (1981). Applied Regression Analysis, 2nd edn. Wiley, New York.

Efroymson , M.A. (1960). Multiple regression analysis. In: Ralston , A. & Wilf, H.S. (eds). Mathematical Methods for Digital Computers. Wiley, New York.

Eilers, P.H.C. & Marx, B.D. (2003). Multivariate calibration with temperature interaction using two dimensional penalized signal regression. Chemometrics and Intelligent Laboratory Systems, 66, 159–174.

Fitter, A.H. & Fitter, R.S.R. (2002). Rapid changes in Flowering Time in British plants. Science, 296, 1,689–1,691.

Fitter, A.H., Fitter, R.S.R., Harris, I.T.B. & Williamson, M.H. (1995). Relationships between first flowering date and temperature in the flora of a locality in Central England. Functional Ecology, 9, 55–60.

Furley, P.A. & Smith, K.A. (2002). Lothian landscapes, geology, climate and soils. In: Smith, P.M., Dixon, R.O.D. & Cochrane, M.P. (eds). Plant Life of Edinburgh and the Lothians. Edinburgh University Press, Edinburgh, 1–26.

Grace, J. (1987). Climate tolerance and plant distribution. New Phytologist, 106 (suppl.), 113–130.

Grace, J. (2006). The temperature of buds may be higher than you thought. New Phytologist, 170, 1–3.

Halevy, A.H. (1985; 1989). Handbook of Flowering, Vols 1–6. CRC Press, Boca Raton, FL.

Hepper, F.N. (2003). Phenological records of English garden plants in Leeds (Yorkshire) and Richmond (Surrey) from 1946 to 2002. An analysis relating to global warming. Biodiversity and Conservation, 12, 2,503–2,520.

Hulme, M., Turnpenny, J. & Jenkins, G. (2002). Climate change scenarios for the United Kingdom. In: The UKCIP 02 Briefing Report. Tyndall Centre for Climate Change Research, University of East Anglia, UK.

Jackson, J.E. & Hamer, P.J.C. (1980). The causes of year-to-year variation in the average yield of Cox’s Orange Pippin apple in England. Journal of Horticultural Science, 55, 149–156.

Jeffree, E.P. (1960). Some long-term means from The Phenological Reports (1891–1948) of the Royal Meteorological Society. Quarterly Journal of the Royal Meteorological Society, 86, 95–103.

Jochner, S., Heckmann, T., Becht, M. & Menzel, A. (2011). The integration of plant phenology and land use data to create a G15-assisted bioclimatic characterisation of Bavaria, Germany. Plant Ecology & Diversity, 4, 91–101.

Koch, R. (1891). Über bakteriologische Forschung. Verhandlungen des X Internatioanaler Medizinischer Kongress, 1890, 35–47.

Korner, C. & Basler, D. (2010). Phenology under global warming. Science, 327, 1,461– 1,462.

Last, F.T. (1993). Phenology of flowering plants at Longniddry, East Lothian, Scotland. In: Cannell, M.G.R. & Pitcairn, C.A. (eds). Impacts of Mild Winters and of Hot Summers in the United Kingdom in 1988–1990. HMSO, Edinburgh, 28–30 & 15–96.

Last, F. (2001). Keeping records. The Horticulturist, 10(2), 9–11.

Last, F.T., Roberts , A. & Patterson, D. (2003). Climate change? A statistical account of flowering in East Lothian: 1978–2001. In: Baker, S. (ed.). East Lothian Statistical Account 1945–2000. Volume one: The County. East Lothian Council Library Service for the

East Lothian Statistical Account Society, Haddington, East Lothian, 22–29.

Leakey, R.R.B., Ferguson, N.R. & Longman, K.A. (1981). Precocious flowering and reproductive biology of Tripochiton scleroxylon K.Schum. Commonwealth Forestry Review, 60, 117–126.

Linkos alo, T., Lappalainen, H.K. & Hari, P. (2008). A comparison of phenological models of leaf bud burst and flowering of boreal trees using independent observations. Tree Physiology, 28, 1,873–1,882.

Lyndon, R.F. (1992). The environmental control of reproductive development. In: Marshall, C. & Grace, J. (eds). Fruit and Seed Production. Cambridge University Press, Cambridge, 9–32.

Mabey, R. (1982). Introduction. In: Commander, J. (ed.). Gilbert White’s Year, Passages from The Garden Kalendar and The Naturalist Journal. Oxford University Press, Oxford, 5–9.

Macdonald, A.M. (ed.) (1972). Chambers Twentieth Century Dictionary. W. & R. Chambers, Edinburgh, 1,652.

Margary , I.D. (1926). The Marsham phenological record in Norfolk, 1736–1925 and some others. Quarterly Journal of the Royal Meteorological Society, 22, 27–54.

Marsham, H.P. & Bell (1876). The correspondence of Robert Marsham of Stratton-Strawless, in the County of Norfolk, Esquire and Fellow of the Royal Society and The Reverend Gilbert White of Selbourne in the County of Southampton, Master of Arts and Fellow of Oriel College in the University of Oxford 1790–1993. Transactions of the Norfolk

and Norwich Naturalists’ Society, 2, 133–195.

Marx, B.D. & Eilers, P.H.C. (1999). Generalised linear regression on sampled signals and curves: a P-spline approach. Technometrics, 41, 1–13.

Mones, S.A., Peterson, P.M., Shetler, S.G. & Orli, S.S. (2001). Earlier plant flowering in spring as a response to global warming in the Washington, D.C. area. Biodiversity and Conservation, 10, 597–612,

Nelder, J.A. & Mead, E. (1965). A simplex method for function minimization. Computer Journal, 7, 308–313.

Omasa, K. (1998). Effects of climate change on plants in East Asia. Global Environmental Research, 1, 59–69.

Owen, J. (2010). Wildlife of a Garden: Thirty Year Study. Royal Horticultural Society, Peterborough.

Quarrie, J. (ed.) (1992). Earth Summit ’92. In: The United Nations Conference on Environment and Development, Rio de Janeiro 1992. The Regency Press Corporation, London.

Raunkiaer, C. (1934). The Life Forms of Plants and Statistical Plant Geography Being the Collected Papers of C. Raunkiaer. Clarendon Press, Oxford.

Rees, A.R. (1972). The Growth of Bulbs. Academic Press, London.

Roberts , A.M.I. (2008). Exploring relationships between phenological and weather data using smoothing. International Journal of Biometeorology, 52, 463–470.

Roberts , A.M.I. (2010). Smoothing methods. In: Hudson I.L. & Keatley, M.R. (eds). Phenological Research: Methods for Environmental and Climate Change Analysis. Springer, Dordrecht, 255–269.

Roberts , A.M.I. (2012). Comparison of regression methods for phenology. International Journal of Biometeorology, 56, 707–717. Online reference: DOI 10.1007/s00484-011-0472-z.

Roberts , A.M.I., Last, F.T. & Kempton , E. (2004). Preliminary analyses of changes in the first flowering dates of a range of plants between 1978 and 2001. Scottish Natural Heritage Commissioned Report No. 035 (ROAME No. F01NA04).

Schwabe, W.W. (1986). Historical Sketches 16, Vernalization. Journal of Experimental Botany, 37, 572–573.

Smith, L.P. (1968). Seasonable Weather. George Allen & Unwin, London.

Sparks, T.H. & Carey, P.D. (1995). The response of species to climate over two centuries: an analysis of the Marsham phenological record, 1736–1947. Journal of Ecology, 83, 321–329.

Steckel, W. (1960). Über den Einfluss der Temperature auf den Entrag beim Apfel. Dissertation No. 1/2 University of Berlin.

Thompson, R. & Clark, R.M. (2006). Spatio-temporal modelling and assessment of within-species phenological variability using thermal time models. International Journal of Biometeorology, 50, 312–322.

Trudgill, D.L., Honek, A., Li, D. & Van Straalen, N.M. (2005). Thermal timeconcepts and utility, Annals of Applied Biology, 146, 1–14.

Universal dictionary (1993). Readers Digest Association Ltd., London.

Usher, M.B. (2007). Conserving European biodiversity in the context of climate change.

Nature and Environment 149. Council of Europe Publishing, Strasbourg.

Usno (2011). Available online: http://aa.usno.navy.mil/data (accessed August 2012).

Wolkovich, E.M., Cook, B.I., Allen, J.M., Crimmins, T.M., Betancourt , J.L.,

Travers, S.E., Pau, S., Regetz, J., Davies, T.J., Kraft, N.J.B., Ault, T.R.,

Bolmgren, K., Mazer, S.J., McCabe, G.J., McGill, B.J., Parmesan, C.,

Salamin, N., Schwartz , M.D. & Cleland, E.E. (2012). Warming experiments

underpredict plant phenological responses to climate change. Nature, 485, 494–497. Online reference: doi:10.1038/nature11014.

Yates, F. (1981). Sampling Methods for Censuses and Surveys, 4th edn. Griffin, London.

Yoshino, M. & Park ono, H-S. (1996). Variations in the plant phenology affected by global warming. In: Omasa, K., Kai, K.,Taoda, H., Uchijima, Z. & Yoshino, M. (eds). Climate Change and Plants in East Asia. Springer-Verlag, Tokyo, 93–107.

Published
2012-10-31
How to Cite
Last, F. T., & Roberts, A. M. (2012). Onset of Flowering in Biennial and Perennial Garden Plants. Sibbaldia: The International Journal of Botanic Garden Horticulture, (10), 85-132. https://doi.org/10.23823/Sibbaldia/2012.69
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Articles