Constraints on Tundra Productivity: Photosynthetic Capacity in Relation to Solar Radiation Utilization and Water Stress in Arctic and Alpine Tundras

Abstract

Short growing seasons and low temperatures are the primary constraints on productivity in both arctic and alpine tundra environments. This is reflected in the similar life form and the taxonomic affinities of arctic and alpine tundra floras despite the differences in solar radiation intensity, photoperiod, wind regimes, and edaphic factors that often vary substantially between arctic and alpine habitats (Bliss, 1956, 1971).