Claim · model-written summary
Overall tree pattern shifted from random to regular by 1974.
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSettingValueQualifier
Verbatim
e0“total tree pattern shifted from random in 1951-52 to regular in 1974”
Title
Norman L. Christensen The American Midland Naturalist 1977. doi:10.2307/2424693
Other claims from this paper (12)
- Observation Tree density decreased over the study period, especially in overstory trees.
- Observation Total basal area increased from 1951-52 to 1974.
- Observation Carya spp. density fell 75 percent.
- Observation Acer rubrum density rose 230 percent.
- Observation Many dominant species had significantly fewer individuals in smaller size classes in 1974.
- Observation Smaller size classes had low recruitment and high mortality.
- Observation Small trees were clumped and larger trees random or regular on both maps.
- Mechanism Higher mortality among clumped small trees explained the pattern shift.
- Observation Species diversity decreased.
- Observation Pattern diversity increased.
- Mechanism Reduced equitability explained lower species diversity.
- Mechanism Shifts in tree pattern probably explained increased pattern diversity.