Summary
The budget calculations showed that:
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the high uptake rates by the annual macroalgae, which have comparatively low biomasses, make this group play the greatest role in the total macroalgal uptake. The much higher biomasses of the perennials do not compensate for their lower uptake rates.
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in spite of the decreased nutrient concentrations in late spring and summer, the total macroalgal uptakes are still high mostly thanks to the then increased biomasses of the annuals.
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for all macroalgae, NH +4 contributes about half of the N taken up during late spring to midautumn.
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the perennials have their main period of nutrient uptake during late autumn and winter.
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Wallentinus, I. Partitioning of nutrient uptake between annual and perennial seaweeds in a Baltic archipelago area. Hydrobiologia 116, 363–370 (1984). https://doi.org/10.1007/BF00027703
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DOI: https://doi.org/10.1007/BF00027703