The August issue of National Geographic Magazine has very interesting article on salmon on the Russian Kamchatka Peninsula. The story is avalaible at: http://ngm.nationalgeographic.com/20...quammen-text/1 or the link at: http://www.wildsalmoncenter.org/prog...m_salmon09.php
The article covers soviet fishery management and mis-management and the concern for the health of the fisheries and ecosystem.
It appears from the article that the Russian researchers are very much aware and concerned about the flow of nutrients into the river ecosystem and the long term effects of removing these nutrients. One example is made of fast growing trees along the river banks and dying and then falling into the river to provide shelter for the fish. The Russian researchers are gathering data on the nutrient balance in their healthy rivers with massive unchecked salmon runs - this should provide us with some comparitive baseline data to what our levels may have been before we signifcantly altered the nutrient flow with our nets.