Claim · model-written summary
The greatest decrease occurred between 0 and 2 m 2 ha ‐2 tree basal area.
- Taxon
- Acacia harpophylla
Acacia harpophyllat0 - Outcome
- decreasee0
- Direction
- greatest decreasee0
- Value
- 0 and 2 m 2 ha ‐2e0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Acacia harpophylla”
e0“The greatest decrease was seen between 0 and 2 m 2 ha ‐2 tree basal area.”
Title
Woody overstorey and herbaceous understorey biomass in Acacia harpophylla (brigalow) woodlands
J. C. SCANLAN Australian Journal of Ecology 1991. doi:10.1111/j.1442-9993.1991.tb01081.x
Other claims from this paper (12)
- Observation Leaf biomass reached 12 t ha ‐1 at maximum.
- Observation Leaf area index reached 2.5.
- Association Pasture production was lower with higher tree basal area.
- Association pasture basal area was lower with higher tree basal area.
- Association the proportion of sown pasture species was lower with higher tree basal area.
- Observation Annual grasses and broadleaf species represented a greater biomass proportion at high tree basal area.
- Observation The poor control achieved by herbicide sprays on A. harpophylla plants that are 2–2.5 m tall would be partly due to poor coverage of the herbicide spray, as leaf area index is at a maximum at this stage.
- Recommendation A density of 1000 plants ha ‐1 is a threshold value above which regrowth control would be necessary at some stage to maintain acceptable pasture production and composition .
- Observation The non‐linear regression relationship between pasture production and tree basal area was similar to that observed in Eucalyptus spp.
- Observation the value of k for A. harpophylla communities was generally higher than observed in Eucalyptus spp. communities with the same potential pasture production in the absence of trees.
- Observation Within even‐aged stands, the use of tree leaf biomass to predict pasture production showed no advantage over the use of tree basal area as the predictor.
- Observation there are advantages in using tree leaf biomass as a predictor when comparing communities with different size‐ or age‐class structures.