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- W1969376902 abstract "Abstract Intertidal epiphytobenthos activity (expressed in mmol oxygen evolution·m −2 ·h −1 ) and nutrient efflux out of the sediment (computed from pore water nutrient concentration profiles and expressed in μmol·m −2 ·h −1 ) were studied at the same places. Increased ammonia or phosphate efflux stimulated epiphytobenthos activity, and an optimum of epiphtobethos activity was observed when the molar N:P ratio in the efflux agreed with the N:P ratio in diatom biomass. It is concluded that epiphytobenthos patchiness depends on the spatial distribution of nutrient efflux and on the N:P ratio in the efflux. The conditions of nutrient efflux were further studied by fertilizing the sediment with urea and phosphate. Phosphate could be traced in the pore water over two months; ammonia over more than two months. The formation of a diatom bed at the fertilized are was observed once, but efforts to reproduce it failed, indicating the importance of other growth-determining conditions. Nutrient efflux was prevented by a plastic foil to stimulate a possible efflux inhibition by diatom mats. Concentrations below the foil were examined and compared with results from an untreated area. An increase of nutrient concentrations in the pore water was observed." @default.
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- W1969376902 date "1985-12-01" @default.
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- W1969376902 title "Examination of the connection between the patchiness of benthic nutrient efflux and epiphytobenthos patchiness on intertidal flats" @default.
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- W1969376902 doi "https://doi.org/10.1016/0077-7579(85)90034-1" @default.
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