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Diverging shrub and tree growth from the Polar to the Mediterranean biomes across the European continent. | LitMetric

AI Article Synopsis

  • Climate warming is predicted to boost the growth of woody plants, especially in northern areas where temperatures are usually limited, but this warming affects different regions and plant types differently.
  • A study was conducted analyzing the growth responses of junipers and trees (like larch and pine) to rising temperatures over a 5000-km range from Polar to Mediterranean regions.
  • The findings revealed that junipers showed better growth than trees in Mediterranean sites, and that tree growth decline in these areas post-1980s was likely due to drought stress influenced by climate change, while junipers remained unaffected.

Article Abstract

Climate warming is expected to enhance productivity and growth of woody plants, particularly in temperature-limited environments at the northernmost or uppermost limits of their distribution. However, this warming is spatially uneven and temporally variable, and the rise in temperatures differently affects biomes and growth forms. Here, applying a dendroecological approach with generalized additive mixed models, we analysed how the growth of shrubby junipers and coexisting trees (larch and pine species) responds to rising temperatures along a 5000-km latitudinal range including sites from the Polar, Alpine to the Mediterranean biomes. We hypothesize that, being more coupled to ground microclimate, junipers will be less influenced by atmospheric conditions and will less respond to the post-1950 climate warming than coexisting standing trees. Unexpectedly, shrub and tree growth forms revealed divergent growth trends in all the three biomes, with juniper performing better than trees at Mediterranean than at Polar and Alpine sites. The post-1980s decline of tree growth in Mediterranean sites might be induced by drought stress amplified by climate warming and did not affect junipers. We conclude that different but coexisting long-living growth forms can respond differently to the same climate factor and that, even in temperature-limited area, other drivers like the duration of snow cover might locally play a fundamental role on woody plants growth across Europe.

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Source
http://dx.doi.org/10.1111/gcb.13577DOI Listing

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