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Trees

, Volume 29, Issue 6, pp 1791–1804 | Cite as

Pine mortality in southeast Spain after an extreme dry and warm year: interactions among drought stress, carbohydrates and bark beetle attack

  • R. García de la Serrana
  • A. Vilagrosa
  • J. A. Alloza
Original Article
Part of the following topical collections:
  1. Drought Stress

Abstract

Key message

Pine mortality was related to water stress, which caused xylem cavitation. Hydraulic failure and carbon starvation are likely interrelated, and bark beetles attacks did not seem to be directly involved.

Abstract

Forests are extremely important for society given the many services they provide. Climate models reflect increases in temperature and less annual rainfall, which will generate hotter drier environments. Under these conditions, it is predicted that forest ecosystems will be severely affected, and recent studies have accumulated evidence for drought-induced tree mortality. Consequently, many studies have attempted to explain mechanisms of survival and mortality in forest species. However, the physiological mechanisms that underlie drought mortality are not completely understood. The aim of the present study was to analyse the effect of an extremely dry year on the cause of mortality of pines and on forest decline in pine forest populations in southeast Spain. Specifically, we studied the effect of drought stress that caused pine mortality, dynamics of carbohydrates reserves and bark beetle attack. The results suggest that pine mortality can be attributed to an intense drought stress level that caused xylem cavitation. The results also indicate that hydraulic failure and carbon starvation are likely interrelated, which makes separating both mechanisms very difficult. Finally, the recorded bark beetles attack did not seem to be directly involved in mortality, at least not in the forests with less intense drought conditions.

Keywords

Pine mortality Xylem cavitation Carbohydrates Bark beetle infestation Drought Temperature anomalies 

Notes

Acknowledgments

We thank JA. Valiente for supplying the CEAM weather database and JM. Torres for his suggestions to improve the manuscript. This work has been carried out, thanks to Projects SURVIVE (CGL-2011-30531-CO2-02) and GRACCIE (CTM2014-59111-REDC, RED CONSOLIDER-INGENIO 2014 Programme), funded by the Spanish Government, and the PROMETEO programme (DESESTRES 2014/038), funded by Generalitat Valenciana (Regional Valencian Government). R.García de la Serrana is grateful for the Geronimo Forteza grant (FPA/2014/126), funded by Generalitat Valenciana to the SURVIVE project. CEAM is supported by the Generalitat Valenciana.

Compliance with the ethical standards

Conflicts of interest

The authors declare that they have no conflicts of interest.

Supplementary material

468_2015_1261_MOESM1_ESM.docx (350 kb)
Supplementary material 1 (DOCX 349 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • R. García de la Serrana
    • 1
  • A. Vilagrosa
    • 1
  • J. A. Alloza
    • 2
  1. 1.Fundación CEAM, Joint Research Unit University of Alicante-CEAM, Univ. AlicanteAlicanteSpain
  2. 2.Fundación CEAMValenciaSpain

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