Claim · model-written summary
Mean needle longevity decreased 15–40% toward pollution sources.
- Taxon
- Scots pine
Pinus sylvestrist0 - Outcome
- Mean longevitye0
- Direction
- decreasede0
- Value
- 1540%e0
- Setting
- pollution sourcese0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mean longevity (the sum of survival proportions) decreased 1540% as pollution sources were approached.”
t0“Scots pine”
Title
Scots pine needle longevity and gradation of needle shedding along pollution gradients
Jukka Lamppu; Satu Huttunen Canadian Journal of Forest Research 2001. doi:10.1139/x00-161
Other claims from this paper (6)
- Observation Mean longevity had the least variation among needle age parameters.
- Method / resource The first half of gradual shedding was a valid indicator of changes in needle age structure.
- Association Needle age structure varied most markedly in slightly polluted areas.
- Observation Slightly polluted areas continued to pose a risk of acute pollution injuries.
- Method / resource Branch-sample needle age structure was feasible as an objective and reliable Scots pine vitality indicator.
- Recommendation The authors prefer mean longevity for ranking or comparing needle age.