Abstract:We studied reactive oxygen metabolism in natural populations of the brown alga Dictyota dichotoma growing on coral reefs on the west coast of Barbados in March 2000. Algae from deep water (27 to 30 m) had lower dark respiration (0.08 cf. 0.21 mmole O2 cm−2 h−1), light compensation point (7 cf. 18 mmole photons m−2 s−1) and gross light‐saturated photosynthesis (0.44 cf. 0.68 mmole O2 cm−2 h−1) than the same species from shallow (2 to 3 m) water. Compared to shallow water algae, those from 27 to 30 m were more s… Show more
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