Scientists at the University of Maryland in College Park found that global warming and rising carbon dioxide levels in the Earth’s atmosphere will lead to a significant decrease in the ability of forests to absorb nitrogen. About it reported in a press release on Phys.org.
The researchers studied data on the chemical composition of the leaves of hundreds of plant species that were collected in the period from 1980 to 2017. It turned out that the contents of nitrogen compounds in the tissues of those plants that grew in wild ecosystems, during this time decreased by nine percent. Forest soil is not enriched with nitrogen in quantities that are typical for agricultural land, so there is oligotrophication — the depletion of nutrients. This, in turn, reduces the production of biomass.
Access n is reduced due to the fact that the plants are forced to absorb more carbon dioxide content in the atmosphere increases. This, in turn, increases the plant’s need for nitrogen in order to maintain the balance of carbon and nitrogen in cells at optimal levels. The result is a deficiency of mineral compounds, which are necessary for the microbes, disrupting the dead plant tissue.
According to scientists, the results show that it is necessary to revise the model, according to which the increase in the concentration of carbon dioxide in the atmosphere will be mitigated by greenhouse gas absorption of forest ecosystems. In addition, the reduction of access nitrogen have a negative impact on herbivores, which suffer from a shortage of minerals.
In September it was reported that an international group of scientists came to the conclusion that the melting of permafrost and associated carbon emissions reduce emission of carbon dioxide budget (allowable amount of emitted greenhouse gas) to almost zero. As a result, the exceedance of the allowable emissions of greenhouse gases, which can lead to climate disaster is inevitable.
Video, photo All from Russia.