The noble crayfish fishery in the Ljungan river system in Sweden has been subjected to two major shocks; hydropower development in the 1970s, which reduced water flow throughout the system with attendant effects on the crayfish stocks, and an outbreak of crayfish plague in the 1990s which wiped out the...
The Baltic Sea is referred as the most polluted sea in the world. The most serious problem is the eutrophication that is a consequence of nutrient loading through human based activities. Nutrient enrichment has led to growth of phytoplankton that has induced increased algal blooms and oxygen depletion in the...