Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/24506
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Differential impact of hotter drought on seedling performance of five ecologically distinct pine species
Authors: Matias, Luis
Castro, Jorge
Villar-Salvador, Pedro
Quero, Jose Luis
Jump, Alistair
Contact Email: a.s.jump@stir.ac.uk
Keywords: Climate change
ecophysiology
growth
Pinus
regeneration
warming
water potential
Issue Date: Feb-2017
Citation: Matias L, Castro J, Villar-Salvador P, Quero JL & Jump A (2017) Differential impact of hotter drought on seedling performance of five ecologically distinct pine species, Plant Ecology, 218 (2), pp. 201-212.
Abstract: Increasing temperature and drought intensity is inducing the phenomenon of so called “hotter drought”, which is expected to increase in frequency over the coming decades across many areas of the globe, and is expected to have major implications for forest systems. Consequences of hotter drought could be especially relevant for closely-related species overlapping their distributions, since differences in response can translate into range shifts. We assessed the effect of future climatic conditions on the performance of five ecologically distinct pine species common in Europe: Pinus halepensis, P. pinaster, P. nigra, P. sylvestris and P. uncinata. We hypothesised that Mediterranean species inhabiting dry, low-elevation sites will be less affected by the expected warming and drought increase than species inhabiting cold-wet sites. We performed a controlled-conditions experiment simulating current and projected temperature and precipitation and analysed seedling responses in terms of survival, growth, biomass allocation, maximum photochemical efficiency (Fv/Fm) and plant water potential (Ψ). Either an increase of temperature or a reduction of water input alone reduced seedling performance, but the highest impact occurred when these two factors acted in combination. Warming and water limitation reduced Ψ, whereas warming alone reduced biomass allocation to roots and Fv/Fm. However, species responded differentially to warmer and drier conditions, with lowland Mediterranean pines (P. halepensis and P. pinaster) showing higher survival and performance than mountain species. Interspecific differences in response to warmer, drier conditions could contribute to changes in the relative dominance of these pine species in Mediterranean regions where they co-occur and a hotter, drier climate is anticipated.
DOI Link: http://dx.doi.org/10.1007/s11258-016-0677-7
Rights: © The Author(s) 2016 This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Notes: Supported by Stirling-held EU Marie Curie (FP7-2011-IEF-300825)

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