Automated Author ProfileKgope, Barney
Department of Environmental Affairs, South Africa
Kgope, Barney
Department of Environmental Affairs, South Africa
Current S-Index
1.2
Sum of Dataset Indices for all datasets
Average Dataset Index per Dataset
1.2
Average Dataset Index per dataset
Total Datasets
1
Total datasets for this author
Average FAIR Score
76.9%
Average FAIR Score per dataset
Total Citations
1
Total citations to the author's datasets
Total Mentions
0
Total mentions of the author's datasets
S-Index Interpretation
The S-Index (Sharing Index) is a comprehensive metric that represents the cumulative impact of all your datasets. It is calculated as the sum of Dataset Index scores across all your claimed datasets.
What it means:
- A higher S-index indicates greater overall impact of your datasets relative to typical datasets in their fields of research
- The S-Index grows as you add more datasets or as existing datasets gain more citations and mentions
- It provides a single number to track your research data impact over time
Current S-Index: 1.2 (sum of 1 dataset Dataset Index scores)
More information here.
S-Index Over Time
Cumulative Citations Over Time
Cumulative Mentions Over Time
Datasets
- CO2-fertilisation is implicated in the widespread and significant woody encroachment of savannas due to CO2-stimulated increases in belowground reserves that enhance sapling regrowth after fire. However, the effect of CO2 concentration ([CO2]) on tree responses to the other major disturbance in savannas, herbivory, is poorly understood. Herbivory responses cannot be predicted from fire responses, as herbivore effects occur earlier during establishment and are moderated by plant palatability and defence rather than below-ground carbon accumulation. 2. The relationship between herbivory and [CO2] is explored here using a widespread, strongly-encroaching savanna tree, Vachellia karroo. Using greenhouse-grown seedlings under past- through to predicted future-[CO2] (180–1000 ppm) and field-grown seedlings under ambient [CO2], we assessed plant survival, growth, defence and palatability. 3. Increasing [CO2] improves the tolerance of greenhouse-grown seedlings to herbivory by stimulating growth and allowing a critical size-threshold associated with survival to be reached earlier, thereby decreasing the probability of fatal herbivory during the vulnerable recruitment phase. Elevated [CO2] also decreases the time taken to reach a second size-threshold linked to accelerated recovery of field-grown seedlings following herbivory. Seedling growth responses to increasing [CO2] are non-linear, suggesting that historic growth- and survival enhancements are smaller than those predicted for the future. Increasing [CO2] is associated with greater resistance to herbivores (more branched shoot architecture) but not leaf palatability (C:N ratio) or defence (leaf tannins and spine density). 4. Increasing V. karroo densities already constitute a major land management problem in southern African savannas. However, encroachment by this species, and likely other savanna tree species, may be greatly exacerbated under future [CO2], as tolerance to herbivory at the recruitment stage is further enhanced.
Authors
- Ripley, Brad ;
- Raubenheimer, Sarah ;
- Perumal, Lavinia ;
- Anderson, Maurice ;
- Mostert, Emma ;
- Kgope, Barney ;
- Midgley, Guy ;
- Simpson, Kimberley
1 Citation0 Mentions77% FAIR1.2 Dataset Index
10.5061/dryad.hmgqnk9m8October 2022