Claim · model-written summary
Species differed in their survival rates in the understory and in the canopy.
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorDirectionValueQualifier
Verbatim
e0“Species also differed in their survival rates in the understory and in the canopy”
Title
CHANGES IN SOUTHERN APPALACHIAN CANOPY TREE GAPS SAMPLED THRICE
James R. Runkle Ecology 1998. doi:10.1890/0012-9658(1998)079[1768:cisact]2.0.co;2
Other claims from this paper (16)
- Observation Mean extension (branch) growth of border trees was 12 cm/yr.
- Association Extension growth of border trees was slower for longer branches.
- Observation Gap makers that had been tall stumps tended to deteriorate, although 35% stayed intact over the 14 yr of the study.
- Observation Border-tree mortality averaged 0.60%/yr.
- Association Border-tree mortality was higher for larger stems and varied much among species.
- Observation Stem density of saplings in gaps increased during the first sampling interval.
- Observation Stem density of saplings in gaps decreased during the second sampling interval as self-thinning counteracted increased establishment.
- Observation Basal area increased during both sampling intervals.
- Association The death of border trees increased basal area per unit gap area.
- Association Acer saccharum, Tsuga canadensis, Fagus grandifolia and Halesia carolina showed different patterns of correlation to gap size and age.
- Association Species showed more correlations with gap age for the first sample than afterwards.
- Association Gap size was more consistently related to species importance.
- Association Species patterns were affected by the presence or absence of border-tree mortality.
- Observation The stands studied seem nearly at equilibrium.
- Observation The species present dominated all size classes: gap saplings, border trees, other canopy trees not related to gaps, and understory saplings.
- Observation Species differed in their relative growth rates in the understory and in gaps of different sizes.