SP12e The effect of tree species diversity on phosphorus availability and cycling (sp12e phosporus)
The maintenance of soil fertility through species diverse forests might be an important ecosystem service in tropical regions with their large areas of forest plantations. Preliminary investigations at the Comparative Study Plots of BEF China have shown, that soil P concentrations are very low, a large proportion of available P is in organic from, and that many of the species show of leaf and litter P concentrations that are indicative P limitation. However, the high variation of P tissue concentrations points to a variety of species-specific mechanisms to adopt to limited P supply. Given the large range of biologically available soil P compounds, and the variety of mechanisms by which plants can access P, we assume that co-existing plant species partition soil organic P to reduce competition. Based on this we hypothesize that (a) the proportion of soil P in available fractions increases with increasing tree species diversity of plots, (b) neighbourhood tree species diversity affects soil P fractions and nutrition of individual trees, and (c) effects of tree species diversity on productivity decline (complementarity reduction) with decreasing diversity of soil organic P sources. In addition, we will explore whether the different soil P fractions can be distinguished on the basis of their spectral properties, which would greatly reduce analytical efforts.
- CSPs: P concentrations in leaves and roots
- CSPs: Phosphorus fractions of soils: depth increments of 27 Comparative Study Plots
- CSPs: Soil phosphorus neighborhood effects - location of observed tree groups CSP 13, 14, 27
- CSPs: Soil phosphorus neighbourhood effects: P concentration in leaves and litter in CSP 13, 14, 27
- CSPs: Soil phosphorus neighbourhood effects: soil P fraction, pH, C/N in CSP 13, 14, 27
- Main Experiment: Carbon, Nitrogen, Phosphorus in leaves (Site A)
- Main Experiment: Phosphorus fractions of soils (Site A)
Paper proposal submissions
- sp12e phosporus, Flockau (ehem. Todt), B.: 2015, Use of near-infrared spectroscopy to assess phosphorus fractions of different plant availability in forest soils, Proponents and dataowners: Björn Flockau (ehem. Todt), Jürgen Bauhus, Nico Blüthgen, Peter Kühn, Renate Nitschke, Citation: Todt, B., Niederberger, J., Boča, A., Nitschke, R., Kohler, M., Kühn, P., and Bauhus, J.: Use of near-infrared spectroscopy to assess phosphorus fractions of different plant availability in forest soils, Biogeosciences Discuss., 12, 555-592, doi:10.5194/bgd-12-555-2015, 2015.
- sp12e phosporus, Bauhus, J.: 2012, The influence of mixed species tree plantations on the nutrition of individual species: a review. doi:10.1093/treephys/tpq035, Proponents and dataowners: Jürgen Bauhus, Michael Scherer-Lorenzen, Citation: Tree Physiology
- sp12e phosporus, Bauhus, J.: 2012, Use of Near-Infrared Reflectance Spectroscopy to predict species composition in tree fine-root mixtures. doi:10.1007/s11104-010-0325-2, Proponents and dataowners: Jürgen Bauhus, Citation: Plant and Soil