Seasonal variations in salt-marsh macroalgae photosynthesis. I. Ascophyllum nodosum ecad scorpioides
Brinkhuis, B.H. (1977). Seasonal variations in salt-marsh macroalgae photosynthesis. I. Ascophyllum nodosum ecad scorpioides. Mar. Biol. (Berl.) 44(2): 165-175. https://dx.doi.org/10.1007/bf00386956
In: Marine Biology: International Journal on Life in Oceans and Coastal Waters. Springer: Heidelberg; Berlin. ISSN 0025-3162; e-ISSN 1432-1793, more
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| Keywords |
Chemical reactions > Photochemical reactions > Photosynthesis
Light intensity
Population characteristics > Biomass
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| Author keywords |
Seasonal Variation, Growth Pattern |
| Abstract |
Photosynthesis in whole plants of the intertidal alga Ascophyllum nodosum ecad scorpiodes was evaluated by measuring 14C-uptake under a variety of light intensities and approximately monthly intervals during a 15 month study. Photosynthetic rates were determined in terms of dry weight, pigment content and uptake into ethanolsoluble and insoluble fractions. The specimens, naturally acclimated to in situ light intensities and temperatures, exhibited photosynthetic responses to light intensity which differed with time of year. Maximum photosynthetic potential occurred during the spring months and minimum potential occurred during late summer and winter months. Variations in photosynthetic potential were closely related to seasonal changes in field biomass. Both photosynthetic potential and biomass were inversely related to growth patterns of the salt-marsh phanerogam Spartina alternilora. |
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