Climate warming is likely to destroy the king salmon — at least in one of California basin. For no matter what projections were taken, researchers, modeling shows that in coming decades the fish disappear, if people do not come to her aid. This will affect other species of salmon, and all over the west coast of North America. In California, the temperature is as close to a tipping point. "When we got the results, I could not hold back tears," — says Lisa Thompson of the University of California at Davis (USA).
Specialists focused on the river chinook Butte Creek watershed in central California valley, because these fish are particularly sensitive to climate change. The fact that adults spend the summer in the fresh waters (where the fall breeding), and they heat up faster than the Pacific Ocean, where the fish live at all other times.
So, earlier in this area is home to over a million salmon. Today they are less than ten thousand — 99-percent drop in!
The researchers created a model in which take into account all types of climate information on rainfall and temperature to humidity, and wind, and also took note of the field data on how the fish react to different conditions, folding in the rivers during the summer. Scientists have also suggested that the fish in the ocean with nothing bad will happen and it will return to spawn in full.
Were examined six possible scenarios of greenhouse gas emissions. All — even the most hopeful — chinook failed to live up to 2099 years.
However, despite the gloomy forecasts, the salmon are not doomed, negotiated by Ms. Thompson. First, the fish has already proved its ability to find safe shelter in the cooler water at the bottom of rivers. Ms. Thompson saw firsthand the fish lined up in the flow of less than a meter wide, waiting for the hot days.
Second, the fish can help people. For example, do not touch the river water — for example, use it for the needs of the industry. The simulation showed that it will give the fish a decade of life. But does it really make?
Results of the study were published in Journal of Water Resources Planning and Management.