Answers are grounded in this paper and cite their sources.
Alpine plants of Oxyria digyna have higher apparent photosynthesis rates at various carbon dioxide concentrations than arctic, sea-level plants of the same species. The ability to utilize carbon dioxide effectively at low concentrations may be involved in the survival of plants at high elevations.
No takes yet. Share an insight, caveat, or question.
Billings et al. (1961) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: