Differences in nutrient concentrations and resources between seagrass communities on carbonate and terrigenous sediments in South Sulawesi, Indonesia

P.L.A. Erftemeijer

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    Abstract

    Water column, sediment and plant parameters were studied in six tropical seagrass beds in South Sulawesi, Indonesia, to evaluate the relation between seagrass bed nutrient concentrations and sediment type. Coastal seagrass beds on terrigenous sediments had considerably higher biomass of phytoplankton, epiphytic algae and macroalgae, if compared to seagrass beds growing on carbonate sediments in oligotrophic reef flat environments. The size of leaves of seagrass plants of the same species was considerably larger at terrigenous sites than at carbonate sites. Seagrasses in carbonate-rich environments had invested considerably more in below-ground biomass relative to above-ground biomass than those growing on terrigenous sediments. Elementary composition of plant material indicated a richer nutrient supply of both N and P at the terrigenous sites (C:N:P = 340:19:1) than at carbonate sites (C:N:P = 565:18:1). Concentrations of dissolved reactive phosphate, ammonium, and nitrate + nitrite were low (
    Original languageEnglish
    Pages (from-to)403-419
    JournalBulletin of Marine Science
    Volume54
    Issue number2
    Publication statusPublished - 1994

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