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- W2081872875 abstract "Essential nutrients for seagrass growth may be derived from benthic decomposition of organic matter. To test this idea, cores of Halophila ovalis (seagrass-vegetated) and unvegetated sediment (control) were amended with either particulate organic matter (POM) or dissolved organic matter (DOM) to test whether a positive feed-back loop exists, where increased organic matter results in increased seagrass nutrients. POM was added in the form of seagrass wrack (0, 1, 5, 12 g core−1) and DOM was added with sucrose diffusion tubes at the root zone (0, 0.8, 2.4, 5.2 g core−1). Cores were incubated under saturating light conditions (12 h light/12 h dark) at 18 °C, for 4 weeks. Results suggest a complex balance between positive and negative effects of organic matter enrichment. Whilst leaf molar concentrations of N and P of H. ovalis increased (by 15 and 30% respectively), plant growth declined (up to 50% relative to control) for both DOM and POM enrichments. Phosphate was removed from sediment porewater following POM addition and most likely translocated to the leaves. Stressors other than nutrient limitation (e.g. biogeochemical constraints) reduce growth and affect the nutrient dynamics of the seagrass and should be the focus of future work." @default.
- W2081872875 created "2016-06-24" @default.
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- W2081872875 date "2006-07-01" @default.
- W2081872875 modified "2023-10-17" @default.
- W2081872875 title "Limited nutritional benefit to the seagrass Halophila ovalis, in culture, following sediment organic matter enrichment" @default.
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- W2081872875 doi "https://doi.org/10.1016/j.ecss.2006.03.016" @default.
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