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(A) Net photosynthesis (NP) as a function of light in the moss Syrrhopodon incompletus (Palo Seco, Panama, 500 m). (B) NP as a function of ambient CO2 concentration in Leucobryum antillarum (Fortuna, Panama, 1200 m). Data are means ± s.d., n = 5. Dashed lines indicate zero net gas exchange.
