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Photosynthesis and respiration of exposed salt-marsh fucoids
Brinkhuis, B.H.; Tempel, N.R.; Jones, R.F. (1976). Photosynthesis and respiration of exposed salt-marsh fucoids. Mar. Biol. (Berl.) 34(4): 349-359. https://dx.doi.org/10.1007/bf00398128
In: Marine Biology. Springer: Heidelberg; Berlin. ISSN 0025-3162; e-ISSN 1432-1793, more
Peer reviewed article  

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Keywords
    Chemical reactions > Photochemical reactions > Photosynthesis
    Respiration
    Water loss
Author keywords
    Light Intensity, Maximum Intensity

Authors  Top 
  • Brinkhuis, B.H.
  • Tempel, N.R.
  • Jones, R.F.

Abstract
    Photosynthesis and respiration of the salt-marsh fucoids Ascophyllum nodosum ecad scorpioides and Fucus vesiculosus were investigated using an infrared CO2 gas analyzer under a variety of light intensities, temperatures, and levels of desiccation while the algae were exposed to the atmosphere. Results indicated that net photosynthesis (0.5 to 2.0 mg C/g dry weight/h) saturated rapidly at light intensities (0.1 to 0.2 g cal/cm2/min) which were approximately 10 to 50% of the daily summer maximum intensities for algae found under phanerogam (Spartina alterniflora) canopies. Desiccation exhibited the most pronounced effect on photosynthesis, which increases slightly between 0 and 25% water loss, levels off, and decreases sharply at water losses greater than 50%. Dark respiration (0.1 to 0.3 mg C/g dry weight/h) is also inhibited by desiccation. Both species of algae appear to be broadly adapted to all three parameters investigated.

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