The weak magnetic field of the Earth reduces the ability of daphnia to survive
Russian scientists have found that the weakening of the Earth’s magnetic field leads to a decrease in the size of daphnia (daphnia) crustaceans and a slowdown in their reproduction.
This is especially true for aquatic environments with low oxygen content. The RSF press service on Monday, December 26, reported that this indicates that a further weakening of the Earth’s magnetic field will increase the ability of living plankton to live.
“We came to the conclusion that a decrease in the strength of the geomagnetic field can become an important factor that will exacerbate the consequences of hypoxia in water, including those related to the “Empirical data we have received can be used to predict the negative consequences that will arise as a result of global geophysical and climatic processes “.
Today, Earth physicists believe that the position of the Earth’s magnetic poles is not fixed and that their position changes periodically. Scientists have found traces of their change in the deposits of ancient clay and volcanic rocks. Such pole shifts may at times be temporary, as they were 40,000 years ago in particular, and these changes may become permanent, as they were about 780,000 years ago.
Geologists cannot yet say exactly how this process develops and why it occurs, but they suggest that it is associated with a change in the movement of flows inside the liquid part of the core and the core of the Earth and waves propagating on its surface.
In recent years, interest in this problem has increased, as scientists have found that the strength of the planet’s magnetic field has been rapidly decreasing for at least three centuries.
Krylov and his colleagues found that a decrease in the strength of the Earth’s magnetic field can weaken the ability of plankton to survive, as well as increase the impact of other negative changes in ecosystems, which are assumed to be associated with anthropogenic global warming.
Scientists came to this conclusion in the course of experiments conducted on species of daphnia (Daphnia) grown in a nutrient medium with different oxygen concentrations ranging from 2 to 8 milligrams per liter. The researchers were interested in how the gradual decrease in the proportion of this substance in the waters of rivers and lakes, associated with global warming, affects the life of daphnia in conjunction with a decrease in the strength of the Earth’s magnetic field.
To answer this question, the researchers placed part of the colonies of water fleas in a device that dampens the effect of the Earth’s magnetic field, and observed how the vital activity of crustaceans and their ability to survive changed. Here, experiments showed that a weak magnetic field negatively affected the life of Daphnia.