Climate impacts
Beech outcompetes spruce as air chemistry shifts
Open access · cc by · source: Europe PMC
Since 1501, spruce hit water-use saturation under acid rain and drought, while beech kept growing as nitrogen and temperatures rose.
Study at a glance
- Design
- Other — Multi-century tree-ring isotopes and growth chronologies in Šumava old-growth forests
- N
- N=35 · Isotopic dataset: 35 trees spanning ~500 years since 1501 CE
- Population
- European beech, Norway spruce, and silver fir in Šumava mountain forests
- Outcome
- Growth and water-use efficiency under historic acid deposition, N, drought, and warming
Structured fields used in claim comparison tables when every cited study has a complete layer.
Key findings
Spruce showed iWUE saturation and growth declines in acidic, drought-prone periods; beech was resilient to acid deposition; fir growth accelerated once air quality improved; beech is gaining dominance.
Methodology
Measured tree-ring δ13C, δ18O, and δ15N plus growth for European beech, Norway spruce, and silver fir in old-growth Šumava mountain forests.
Limitations
Thirty-five trees in one mountain range cannot represent all temperate forests or isolate a single driver experimentally.
How this study connects
Role on claims
Each row is a claim on a concept or method page where this paper supports, challenges, or qualifies the statement. Roles are hand-checked — not a model guess.
Tree-ring δ¹³C, δ¹⁸O and δ¹⁵N plus growth for European beech, Norway spruce and silver fir in old-growth Šumava forests showed spruce iWUE saturation and growth declines in acidic, drought-prone periods; beech resilient to acid deposition; fir growth accelerating once air quality improved; beech gaining dominance. Thirty-five trees in one mountain range cannot represent all temperate forests or isolate a single driver experimentally.
Evidence for the claim as stated.
Mixed-effects and adjacent hierarchical papers here are not one invasive-species result. Children's BMI growth is a traffic-pollution question (non-freeway NOₓ associated; freeway NOₓ not). Abisko space-for-time finds SOC falling from 9.01 to 4.51 kg m⁻² heath to forest as a shrub-expansion analogue. Šumava tree rings track beech versus spruce under shifting air chemistry in 35 trees. The brown-trout PVA is a suppression forecast (QE in 5.7–6.3 years; 29% if age-0 methods are skipped), not a mixed model of field counts proving those rates. The method label mixes four questions.
Evidence for the claim as stated.
Even within vegetation change, Abisko and Šumava do not tell the same carbon or competitive story. Shrub and forest plots at Abisko held less SOC and respired about three times heath rates per kilogram of organic carbon. Šumava emphasises species replacement (beech gaining, spruce declining under acid/drought, fir recovering with cleaner air) rather than a measured SOC collapse along a shrub transect.
Evidence for the claim as stated.
Open questions
Tensions this paper is part of
From concept pages' “where studies disagree.” Disagreement means the same question; scope means different assays, populations, or outcomes.
Mixed-effects and adjacent hierarchical papers here are not one invasive-species result. Children's BMI growth is a traffic-pollution question (non-freeway NOₓ associated; freeway NOₓ not). Abisko space-for-time finds SOC falling from 9.01 to 4.51 kg m⁻² heath to forest as a shrub-expansion analogue. Šumava tree rings track beech versus spruce under shifting air chemistry in 35 trees. The brown-trout PVA is a suppression forecast (QE in 5.7–6.3 years; 29% if age-0 methods are skipped), not a mixed model of field counts proving those rates. The method label mixes four questions.
- Supports · Non-freeway NOx tracks children's BMI growth
- Supports · Shrubs and trees empty subarctic soil carbon
- Supports · Suppressing invasive brown trout networks
Even within vegetation change, Abisko and Šumava do not tell the same carbon or competitive story. Shrub and forest plots at Abisko held less SOC and respired about three times heath rates per kilogram of organic carbon. Šumava emphasises species replacement (beech gaining, spruce declining under acid/drought, fir recovering with cleaner air) rather than a measured SOC collapse along a shrub transect.
- Supports · Shrubs and trees empty subarctic soil carbon
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Same topic cluster — not a recommendation engine.