Warming waters in the sea of Japan by two degrees Celsius may in the future lead to the fact that fish of temperate latitudes, which are the basis of the diet of the people of Japan, will be replaced by more heat-loving tropical species. To such conclusions came the oceanographer of Japan, who for 13 years have seen the marine ecosystems in the Gulf of Wakasa in terms of inflow of warm water from nuclear power plants and in the absence of additional heating of water. The results of the study published in the journal PLOS One.
Scientists suggest that by 2050 the temperature of the water in the oceans will rise by two degrees Celsius and by 2100 — is already four degrees Celsius compared to the current level. This will lead to changes in the species composition of marine ecosystems, especially in the tropics. Currently, one of the best sites to study the response of ecosystems to warming and make predictions of future changes is considered the sea of Japan: during the twentieth century the temperature has increased 1.7 degrees Celsius (while the oceans warmed only by 0.53 degrees Celsius). In addition, along the coastline of the sea of Japan are nuclear power stations that are taken out of sea water for cooling, and return it warmer.
Reiji Masuda (Masuda Reiji) from Kyoto University were observed for species composition of coastal ecosystems in the Gulf of Wakasa every winter for 13 years. For the study he selected three sites with different conditions: Otomi, Sasaki and Nagahama. Playground Otomi located two kilometers below the flow point of discharge of warm waters from Takahashi nuclear power plants, and the water temperature is two degrees Celsius higher than average in the sea of Japan. During the first round of surveillance (2004 to 2012) nuclear power plant worked, but after 2012 because of the disaster at the Fukushima nuclear power plant was decommissioned, and during the second phase (2013 to 2017) was no longer active. In Sasaki is a coal-fired power plant, which also resets the warm water in the ocean and did not stop their work. Site in Takayama Japanese oceanographer chose as background — there is no thermal effect.