ISSN (print) 0868-8540, (online) 2413-5984
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Algologia 2019, 29(4): 440–445
Ecology, Cenology, Conservation of Algae and Their Role in Nature

Daily dynamics of photosynthesis, respiration and production of Fucus vesiculosus L. in the Barents Sea

Stepanyan O.V.

The diurnal dynamics of photosynthesis, respiration, and production of brown alga Fucus vesiculosus abundantly occurring in the littoral of the southern part of the Barents Sea, was studied. Materials for the study were collected in August 2002, July 2011, and April 2013 at a biological station located in Zelenetskaya Bay of the Barents Sea. Small (2–3 cm long) fouling-free thalli without epiphytes and invertebrates were selected for research. It was shown that the dynamics of photosynthesis and respiration of algae during the day depends on illumination (the amount of photosynthetically active radiation). The maximum values of illumination (1.56 mg O2/g•h) and respiration (1.39 mg O2/g•h) were noted in the summer. The maximum daily production was observed in April (0.24 mg C/g•h) and August (0.44 mg C/g•h).

Keywords: Fucus vesiculosus, Barents Sea, photosynthesis, respiration

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