Drawn to its serene beauty S\u00e5gsj\u00f6n awaits our discovery. This lake nestled in Nacka municipality is a testament to nature’s artistry. S\u00e5gsj\u00f6n is part of the Norrstr\u00f6m-Tyres\u00e5n coastal area.
S\u00e5gsj\u00f6n’s vital statistics reveal its character. It reaches a depth of 19.4 meters. Its surface spans 0.303 square kilometers. The lake sits just 2.4 meters above sea level.
Boo Fiskev\u00e5rdsomr\u00e5desf\u00f6rening manages the fishing in S\u00e5gsj\u00f6n. However S\u00e5gsj\u00f6ns Kr\u00e4ftfiskeklubb controls the crayfish fishing rights. Fishing is allowed with hand gear. This includes rods with lines and hooks. There is a limit of ten hooks per rod. Boats are not allowed for these fishing methods.
What swims beneath S\u00e5gsj\u00f6n’s surface? The latest surveys found perch and spined loach. Also present are bleak and roach. Mussel species include pointed paintbrush mussels common pond mussels and large pond mussels.
There is a fishing ban from April 15 to June 15. This protects the fish during spawning season.
A 2012 survey revealed ten fish species. These included perch and ziege. There was also vimba bream and rudd. Gudgeon minnow and tench were present. The fish population is dominated by perch and roach. This survey assessed the lake’s ecological status. High fish density avoiding deep water suggests eutrophication. The ecological status was rated as moderate.
Vegetation clusters near the shores. The richest plant life thrives in shallow bays like Rens\u00e4traviken. Common arrowheads dominate the surface. Bulrushes water lilies and shoreline vegetation are also abundant. Reeds appear in patches in S\u00e5gsj\u00f6n’s northwest. Underwater vegetation has spread significantly in recent years.
The area around S\u00e5gsj\u00f6n teems with life. Diverse flora and fauna share this space. A beaver lodge and flowing currents mark the lake’s outlet to Saltsj\u00f6n.
Shore protection applies to the water and land around S\u00e5gsj\u00f6n. The county administrative board values this area highly.
S\u00e5gsj\u00f6n is nutrient-rich. Phosphorus levels are high in the north. They are moderately high in the south. The water clarity is moderate. Oxygen depletion often occurs in the lake’s depths.
S\u00e5gsj\u00f6n’s depth and summer temperature stratification affect nutrient mixing. Nutrient-rich bottom water does not mix with nutrient-poor surface water. This can trigger algal blooms. Sewage treatment has reduced nutrient load in recent years.
S\u00e5gsj\u00f6n resists acidification well. Stockholm University has studied S\u00e5gsj\u00f6n since 1956. This gives the lake special scientific value.
Vegetation is regularly cleared. S\u00e5gsj\u00f6n needs further nutrient inflow reduction.
In 2011 and 2012 S\u00e5gsj\u00f6b\u00e4cken was cleared. Riffles were added. This helps spawning pike trout and other fish from Saltsj\u00f6n reach S\u00e5gsj\u00f6n.
S\u00e5gsj\u00f6badet a municipal bathing spot lies on the lake’s northeast shore. Southwest of the lake lie inviting forests and meadows towards Rens\u00e4ttra. Eastward Booleden hiking trail leads towards Velamsund.
According to varve counting S\u00e5gsj\u00f6n separated from the Baltic Sea between 1500 and 1600 AD.
S\u00e5gsj\u00f6n is not just a body of water. It is a dynamic ecosystem. It shows the interplay of nature and human influence. As we leave S\u00e5gsj\u00f6n remember its story. It is a story of ecological balance scientific study and recreational enjoyment.