Ecological Aspects of Transpiration. I. Pike's Peak Region: Climatic Aspects

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Abstract
A comparison of the plains, montane, and alpine climates of the Pike''s Peak region showed that: (a) air and soil temp, saturation deficit and evaporation decrease with increased altitude; (b) radiant energy, relative humidities, rainfall, and holard are usually greater at higher elevations; (c) wind movement is constantly highest in the alpine region, with the plains next, and the montane zone ordinarily the lowest. The functional responses of plants in these 3 climates showed: (a) a decrease of transpiration with increased altitude; (b) a decrease of growth rate with increased altitude. The transpiration curve showed a closer correlation with the air temp, and the relative humidity curves than with any of the other factors measured. Vegetation does not respond to any 1 factor, but rather to all of the climatic conditions.

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