39 uppsatser · sida 3 av 3
Due to exploitation of the world’s rivers, the upstream migration of anadromous species is frequently delayed or even prevented. To mitigate these problems and allow fish to migrate past obstacles, structures such as fish ladders have been developed. However, recent studies show …
skakförsök baserade på två svenska långliggande kalk- och fosforgödslingsförsök
… Agriculture accounts for 44% of human emissions of phosphorus to lakes and rivers. Leaching occurs of particle bound phosphorus and of dissolved phosphate. The amount of phosphate in the soil solution that may be leached is partly due to the prevailing pH in the soil solution …
Jämförelse av fångstrapportering mellan intervjuer och enkäter gjorda på trollingfiskare samt vädrets påverkan på ansträngning
… vanished or declined dramatically due to the construction of hydropower in the rivers around the lake, and still today the future of the remaining populations remains uncertain. To manage salmonid fishes effectively more knowledge of their ecology throughout their different …
… farming and manure storage could contribute to the eutrophication of lakes and rivers. For instance, when the ground becomes saturated, phosphorus leakage could be seen in surface runoff or in point sources resulting from inadequate manure storage management. In the municipality …
En studie utförd vid Stockholm Arlanda flygplats
… The high oxygen demand of propylene glycol can cause oxygen depletion in rivers downstream from the airport if not collected. Mass balance calculations made by Swedavia indicate that the actual amount of gathered propylene glycol is underestimated. Suspicions that propylene …
… has low impact of human activity and is considered to be a reference river to rivers in northern Sweden. The sample areas where between 22.5 up to 109 m2, in the stream where all dead wood classified as LWD (length over one meter long and a diameter larger than teen cm) reported …
… Arctic through the air and oceans, once within the Arctic they spread through rivers, lakes and other watercourses. Polar bears and sledge dogs in-gest high concentrations of environmental chemicals since many of the chemicals are fat-soluble and their diet mainly consists of …
Höga flöden och dess inverkan på spårmetalltransporten är av stort samhällsintresse med klimatförändringarnas redan idag märkbara påverkan. Ökad nederbörd och därmed vattenföring kommer leda till att spårmetalltranporten i våra svenska vattendrag kommer att förändras på sikt …
vad kräver livsmedelsbranschen?
… these contribute significantly to the total discharge of phosphorus to rivers and lakes, causing eutrophication. In order to reduce eutrophication and to fulfil one of the environmental quality objectives, the decision was taken by the Swedish Government in 2005 that 60 % of …
