Titlebook: Nutrient Reduction and Biomanipulation as Tools to Improve Water Quality: The Lake Ringsjön Story; Lars-Anders Hansson,Eva Bergman Book 19

PHON

DIKE

Deduct

正论

Senescent

,Internal phosphorus loading in Lake Ringsjön, the sediments of Sätofta Basin. Although there are no direct quantifications of phosphorus release from the sediments in Lake Ringsjön, measurements of phosphorus concentrations in the water mass as well as budget calculations for the three basins clearly show a high capacity for internal loading.

慢跑鞋

lavish

,Planning and execution of the fish reduction in Lake Ringsjön,nto the lake reduced the initial daily catch to 2–3 tons. A grand total of 240 tons of fish were removed by trawling Lake Ringsjön over a 3 year period. The catch was either fermented with myric acid or deep-frozen before being used as mink and pelican food respectively. Some of the catch was also u

Choreography

尖牙

Impact of cyprinid reduction on the benthic macroinvertebrate community and implications for increa potential role of an increased macroinvertebrate abundance due to fish removal and its effects on recirculation of nutrients over the sediment¡ªwater interface is discussed. It was observed that average total nitrogen retention in Lake Ringsjön before and after the reduction was 59±5% and 82±15%, r

FUME

,Simulating the effects of biomanipulation on the food web of Lake Ringsjön,resulting from the performed biomanipulation. This discrepancy may partly be attributed to structural uncertainties in the model, related to the size structure of predators on zooplankton, i.e. the omnivorous fish community. The simulations suggest that phosphorus was routed along the pelagic food c