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IOC, FAN, FLU & RIM: incoherent acronyms to assess coastal eutrophication coherently

AuthorsFlo Arcas, Eva ; Camp, Jordi
Issue Date20-Jun-2018
Citation4th International Symposium on Research and Management of Eutrophication in Coastal Ecosystems: Programme and book of abstracts: 15 (2018)
AbstractMultiple approaches to assess coastal eutrophication have been proposed. However, there are some methodological gaps regarding its risk and impact assessment, for which we present some solutions. First, the index of chlorophyll-a (IOC) is proposed, which is based on this parameter and on salinity and allows an evaluation of the biological state of coastal waters and thus of their eutrophication impact. Second, the Phosphate-Ammonium-Nitrite (FAN) and FLUviality (FLU) indexes are described, which rely on a previous study of the NW Mediterranean. This study demonstrated that the main pressures that trigger the production of chlorophyll-a on coastal waters are nutrient-rich continental inflows and distinguished between their urban vs. fluvial-agricultural origins. The FAN index mainly reflects phosphate, ammonium, and nitrite levels and thus describes a gradient related to urban pressures into coastal waters. The FLU index is an indicator mostly of silicate and nitrate levels but also of freshwater inputs (inversely related to salinity); as such, it describes a gradient related to pressures deriving from fluvial and agricultural sources. Together, the two indexes enable an assessment of the physicochemical state of coastal waters and thus of their eutrophication risk. In addition, they provide for the distinction and quantification of the respective continental pressures. Finally, an integrated assessment based on the three indexes is proposed through the Risk-Impact-Management table (RIM). This table offers insights into the risk, impact, and continental origins of coastal water eutrophication and thus elucidates which actions should be implemented and where, being an essential cornerstone for management
Description4th International Symposium on Research and Management of Eutrophication in Coastal Ecosystems (EUTRO 2018), 18-20 June 2018, Nyborg, Denmark.-- 1 page
Appears in Collections:(ICM) Comunicaciones congresos
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