European Journal of Forest Research

, Volume 135, Issue 4, pp 743–754

Current and future conifer seed production in the Alps: testing weather factors as cues behind masting

  • F. Bisi
  • J. von Hardenberg
  • S. Bertolino
  • L. A. Wauters
  • S. Imperio
  • D. G. Preatoni
  • A. Provenzale
  • M. V. Mazzamuto
  • A. Martinoli
Original Paper

DOI: 10.1007/s10342-016-0969-4

Cite this article as:
Bisi, F., von Hardenberg, J., Bertolino, S. et al. Eur J Forest Res (2016) 135: 743. doi:10.1007/s10342-016-0969-4
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Abstract

Temporal patterns of masting in conifer species are intriguing phenomena that have cascading effects on different trophic levels in ecosystems. Many studies suggest that meteorological cues (changes in temperature and precipitation) affect variation in seed-crop size over years. We monitored cone crops of six conifer species in the Italian Alps (1999–2013) and analysed which seasonal weather factors affected annual variation in cone production at forest community level. Larch, Norway spruce and silver fir showed masting while temporal patterns in Pinus sp. were less pronounced. We found limited support for the temperature difference model proposed by Kelly et al. Both seasonal (mainly spring and summer) temperatures and precipitations of 1 and 2 years prior to seed maturation affected cone-crop size, with no significant effect of previous year’s cone crop. Next, we estimated future forest cone production until 2100, applying climate projection (using RCP 8.5 scenario) to the weather model that best predicted variation in measured cone crops. We found no evidence of long-term changes in average cone production over the twenty-first century, despite increase in average temperature and decrease in precipitation. The amplitude of predicted annual fluctuations in cone production varies over time, depending on study area. The opposite signs of temperature effects 1 and 2 years prior to seed set show that temperature differences are indeed a relevant cue. Hence, predicted patterns of masting followed by 1 or more years of poor-medium cone production suggest a high degree of resilience of alpine conifer forests under global warming scenario.

Keywords

Global warmingAlpsConiferForestConesMasting

Supplementary material

10342_2016_969_MOESM1_ESM.pdf (64 kb)
Online Resource 1Autocorrelation function estimates, in bold significant correlation (PDF 64 kb)
10342_2016_969_MOESM2_ESM.pdf (84 kb)
Online Resource 2Seed production for each area and species (PDF 84 kb)
10342_2016_969_MOESM3_ESM.pdf (103 kb)
Online Resource 3Cones prediction (PDF 102 kb)

Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • F. Bisi
    • 1
  • J. von Hardenberg
    • 2
  • S. Bertolino
    • 3
  • L. A. Wauters
    • 1
    • 4
  • S. Imperio
    • 2
  • D. G. Preatoni
    • 1
  • A. Provenzale
    • 5
  • M. V. Mazzamuto
    • 1
  • A. Martinoli
    • 1
  1. 1.Environment Analysis and Management Unit, Guido Tosi Research Group, Department of Theoretical and Applied SciencesInsubria UniversityVareseItaly
  2. 2.Institute of Atmospheric Sciences and Climate, CNRTurinItaly
  3. 3.Department of Agriculture, Forest and Food SciencesUniversity of TurinGrugliasco, TurinItaly
  4. 4.Evolutionary Ecology Group, Department of BiologyUniversity of AntwerpAntwerpBelgium
  5. 5.Institute of Geosciences and Earth Resources, CNRPisaItaly