CO2 fluxes of cryptogamic crusts: I. Response to resaturation
1993
JEFFRIES, D. L. | LINK, S. O. | KLOPATEK, J. M.
The relationship between carbon dioxide exchange of Microcoleus‐ and Scytonema‐dominated cryptogamic crusts and resaturation time was measured in the laboratory with a modified discrete sampling technique and infrared gas analysis. Maximum net photosynthetic rate of Microcoleus was 187 nmol CO₂m⁻²s⁻¹ and of Scytonema was 111 nmol CO₂m⁻²s⁻¹ for rehydration to 100% soil saturation. Both crust types demonstrated a slow rise in resaturation respiration and took 2 days to become fully active after the (first rehydration to 100% soil saturation after long‐term dryness, and only one day to become active after the second rehydration cycle.
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