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Free Content Physiological Differentiation of the Red Seaweed Gracilaria Tikvahiae from a Mangel Estuary, Exposed Coast, and Culture

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Chlorophyll a, phycoerythrin and photosynthetic responses of branches of the red alga Gracilaria tikvahiae were compared in an acclimation study. Plants cultured from carpospores, and freshly collected from a protected mangrove estuary and an exposed coast were used. Each population showed similar but significantly distinct photosynthetic responses to temperature and salinity during culturing in the initial 7-day acclimation period, during a factorial combination of two temperatures and two salinities over 14 days, and after placement in a common garden set of conditions for a final 14 days. In contrast, the pigment levels, which were originally different, were similar at the end of the study. The study suggests that each population, all originating from Tampa Bay, Florida, shows ecotypic differentiation as well as broad tolerances to salinity and temperature.
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Document Type: Research Article

Publication date: 1994-03-01

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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