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Cycling of fluoride in a mangrove community near a fluoride emission source

Murray, F. (1985) Cycling of fluoride in a mangrove community near a fluoride emission source. Journal of Applied Ecology, 22 (1). pp. 277-285.

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Comparison of stands of immature grey mangroves Avicennia marina growing near a fluoride emission source (Kooragang Island, Australia) and a relatively unpolluted area (Gosford) showed that A. marina can accumulate high concentrations of F, particularly in leaves, generally without visible injury. Fluoride input to the Kooragang Island ecosystem as bulk deposition of F was 0.31g m-2 yr-1; this varied with the distance and direction of each site in relation to emission sources. Most of the input at Kooragang Island was gaseous F, but a small particulate F input occurred. Above-ground biomass at both sites was practically identical (21.8 and 21.7 dry t ha-1 respectively) but the F concentration of leaves and branches were almost 2 orders of magnitude greater at Kooragang Island than at Gosford. Consequently the above-ground F in the standing crop was much greater at Kooragang Island (2.7kg F ha-1) than at Gosford (0.04kg F ha-1). The rates of F deposition in litterfall were also 2 orders of magnitude different (176 and 1.42mg F m-2 yr-1 respectively). Mangrove communities may export up to 25kg ha-1 day-1 of detritus to estuarine food webs of commercial and ecological importance, so the F retentive capacity of mangrove communities is of potential significance.

Item Type: Journal Article
Publisher: Blackwell Publishing Inc.
Copyright: © 1985 British Ecological Society
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