ArticleFrontiers in plant science2016
Novel Hydraulic Vulnerability Proxies for a Boreal Conifer Species Reveal That Opportunists May Have Lower Survival Prospects under Extreme Climatic Events.
Article in Frontiers in plant science, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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13 citing papers in PubMed.
- Hydraulic path length as a determinant of xylem conduit size at the stem base, regardless of cambial age.Tree physiology · 2025Article
- Hydraulic architecture, height-related changes in photosynthesis and seasonal positive pressure declines in bamboo: implications for top dieback.Annals of botany · 2025Article
- A protocol for high-quality sectioning for tree-ring anatomy.Frontiers in plant science · 2025Article
- Twenty years of irrigation acclimation is driven by denser canopies and not by plasticity in twig- and needle-level hydraulics in a Pinus sylvestris forest.Journal of experimental botany · 2024Article
- Tracheid and Pit Dimensions Hardly Vary in the Xylem ofFrontiers in plant science · 2021Article
- Physiological and anatomical responses to drought stress differ between two larch species and their hybrid.Trees (Berlin, Germany : West) · 2021Article
- Adaptive genetic variation to drought in a widely distributed conifer suggests a potential for increasing forest resilience in a drying climate.The New phytologist · 2020Article
- Long-Term Impacts of Defoliator Outbreaks on Larch Xylem Structure and Tree-Ring Biomass.Frontiers in plant science · 2020Article
- Functional Relationships of Wood Anatomical Traits in Norway Spruce.Frontiers in plant science · 2020Article
- Prediction of hydraulic conductivity loss from relative water loss: new insights into water storage of tree stems and branches.Physiologia plantarum · 2019Article
- Drought-induced dieback ofConservation physiology · 2019Article
- Size Matters a Lot: Drought-Affected Italian Oaks Are Smaller and Show Lower Growth Prior to Tree Death.Frontiers in plant science · 2017Article
- A Tree-Centered Approach to Assess Impacts of Extreme Climatic Events on Forests.Frontiers in plant science · 2016Article
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9 authors.
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Abstract
Top dieback in 40-60 years old forest stands of Norway spruce [Picea abies (L.) Karst.] in southern Norway is supposed to be associated with climatic extremes. Our intention was to learn more about the processes related to top dieback and in particular about the plasticity of possible predisposing factors. We aimed at (i) developing proxies for P 50 based on anatomical data assessed by SilviScan technology and (ii) testing these proxies for their plasticity regarding climate, in order to (iii) analyze annual variations of hydraulic proxies of healthy looking trees and trees with top dieback upon their impact on tree survival. At two sites we selected 10 tree pairs, i.e., one healthy looking tree and one tree with visual signs of dieback such as dry tops, needle shortening and needle yellowing (n = 40 trees). Vulnerability to cavitation (P 50) of the main trunk was assessed in a selected sample set (n = 19) and we thereafter applied SilviScan technology to measure cell dimensions (lumen (b) and cell wall thickness (t)) in these specimen and in all 40 trees in tree rings formed between 1990 and 2010. In a first analysis step, we searched for anatomical proxies for P 50. The set of potential proxies included hydraulic lumen diameters and wall reinforcement parameters based on mean, radial, and tangential tracheid diameters. The conduit wall reinforcement based on tangential hydraulic lumen diameters ((t/b ht)(2)) was the best estimate for P 50. It was thus possible to relate climatic extremes to the potential vulnerability of single annual rings. Trees with top dieback had significantly lower (t/b ht)(2) and wider tangential (hydraulic) lumen diameters some years before a period of water deficit (2005-2006). Radial (hydraulic) lumen diameters showed however no significant differences between both tree groups. (t/b ht)(2) was influenced by annual climate variability; strongest correlations were found with precipitation in September of the previous growing season: high precipitation in previous September resulted in more vulnerable annual rings in the next season. The results are discussed with respect to an "opportunistic behavior" and genetic predisposition to drought sensitivity.
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