Appendix 1. PRISMA work flow dragram;Appendix 2. Literature list;Appendix 3. Dataset for meta-analysis;Appendix 4. Meta-analysis of other covariates;Appendix 5. Publication bias from Species richness alters spatial nutrient heterogeneity effects on above-ground plant biomass

to show how studies were searched and selected;A list of literature selected for meta-analysis;Dataset extracted for the meta-analysis;meta-analysis for other covariates ;details on analysis of publication bias