Data for: The oxygen isotope composition of bioavailable phosphate in soil reflects the oxygen isotope composition in soil water driven by plant diversity effects on evaporation

Oxygen isotope ratios in soil water (delta18OSW) and released P (delta18OPi), O incorporation factor a and equilibrium delta18OPi (delta18OPi(Equ)) values for all samples. All values are given in ‰ based on the VSMOW (Vienna Standard Mean Ocean Water).