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Appendix A: Boundary layer effect on the relationship between OSI and species richness.
Ecological Archives E092-131-A1.

Appendix B: Derivation of the OSI from first principles on gas diffusion.
Ecological Archives E092-131-A2.

Appendix C: Description of the data sets on body size and data analysis.
Ecological Archives E092-131-A3.

Appendix D: Description of the data sets on species richness and data analysis.
Ecological Archives E092-131-A4.

Appendix E: Additional analysis, showing oxygen to be of greater importance at higher altitudes.
Ecological Archives E092-131-A5.


Supplement 1: Data and formulas used in the analyses on body size and richness.
Ecological Archives E092-131-S1.