Variability of nutrient limitation in the Archipelago Sea, SW Finland

摘要: Eutrophication is the most acute environmental problem in Archipelago Sea, SW Finland. When analysing factors behind this escalating eutrophication determination of limiting nutrient at a given time essential. Besides experimentations, limitation plankton has been extensively studied by direct chemical analyses. We used latter approach work. Nutrient was calculating different ratios — total nitrogen:phosphorus, inorganic and balance ratio. Results showed that phosphorus usually limited primary production only near coast line. In middle, zone Sea factor varied temporally. Outer open sea nitrogen during year. Phosphorus phytoplankton growth especially spring summer late autumn. Our results suggested an important Sea. recent years when proceeded there shift from both nutrients to alone. But if we want define characterize entire ecosystem budgets have be calculated for N P internal recycling must taken into account as well external supply loss processes.