NDLI: Dynamics of frost tolerance during regeneration in a mixed (pine–oak

Content Provider	Springer Nature Link
Author	Mayoral, Carolina Strimbeck, Richard Sánchez González, Mariola Calama, Rafael Pardos, Marta
Copyright Year	2015
Abstract	The effect of unexpected low temperature on coexisting species in inland locations was examined; frost tolerance simulation over a 2-year period was used to determine bottlenecks where competition can arise. The effect of frost events on natural regeneration of Mediterranean mixed forests under a scenario of climate change is not well known. The expected increase in mean annual temperature and the greater inter- and intra-annual variability in frosts occurrence can significantly damage natural regeneration leading to death, with a decisive effect on species composition and forest dynamics. We investigated seasonal variations in frost tolerance of three Mediterranean species (Pinus pinea, Quercus ilex and Juniperus oxycedrus) co-occurring in inland locations in Spain. Our aim was to assess seasonal inter-specific differences in frost sensitivity or tolerance. First, we applied the relative electrolyte leakage method (REL) to estimate the frost tolerance of these species every 3–4 weeks during the 9-month period in which frost events can occur in a year. Second, we explored the REL relationship with environmental variables impacting frost acclimation/deacclimation, i.e., absolute minimum and maximum temperatures and photoperiod. Third, we built a REL model to predict seasonal variations in REL performance of young trees. We simulated REL through a 2-year period, thus defining seasonal bottlenecks in which the dynamics of regeneration can be affected by frost events. Our results showed contrasting behaviors between species, highlighting a greater sensitivity to cold of P. pinea compared to the other two species. The three species are most vulnerable in autumn; however, the different strategies to cope with unfavorable conditions adopted by Q. ilex and J. oxycedrus (e.g., stress tolerance and/or resprouting ability) give these species a competitive advantage over P. pinea.
Starting Page	1893
Ending Page	1906
Page Count	14
File Format	PDF
ISSN	09311890
Journal	Trees
Volume Number	29
Issue Number	6
e-ISSN	14322285
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-08-26
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Acclimation–deacclimation patterns Cold hardiness Modeling REL Juniperus oxycedrus Quercus ilex Pinus pinea Forestry Plant Sciences Agriculture Plant Anatomy/Development Plant Pathology Plant Physiology
Content Type	Text
Resource Type	Article
Subject	Ecology Physiology Plant Science Forestry

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