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EVALUATING CARBON METABOLISM OF PORPHYRA BASED ON IRRADIANCE, TEMPERATURE AND NUTRIENT CONCENTRATIONS
Publication year - 2001
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.2001.jpy37303-100.x
Subject(s) - biology , nutrient , algae , porphyra , biomass (ecology) , effluent , photosynthesis , botany , aquaculture , total inorganic carbon , ecology , fishery , fish <actinopterygii> , environmental science , carbon dioxide , environmental engineering
Ottman, F. Purchase College, State University of New York, Purchase NY 10577 Fish aquaculture produces a nutrient‐rich effluent. One means to remediate the discharge of these effluents is to couple seaweed culture with that of fine‐fish. Seaweeds assimilate inorganic nutrients and some may produce tissue that can be sold. Porphyra culture is a multi‐billion dollar global industry producing edible biomass and high‐value biochemicals. To identify fast growers, we have examined the carbon metabolism of Porphyra purpurea, P.umbilicalis and P.leucosticta by measuring photosynthetic production at light levels ranging from 17 μmol photon m ‐2 s ‐1 (sub‐saturating) up to 315 μmol photon m ‐2 s ‐1 (saturating). These experiments identified species that are efficient at low (higher Κ) and high irradiances (P max ). The three species were also evaluated at growth temperatures 5°C, 15°C and 20° C to determine optimal growth temperatures along with varying nutrient concentrations. Results of these experiments will help choose Porphyra species for maximum growth and biomass under varying light, nutrient concentration and temperature conditions.