by Staff Writers
Moscow, Russia (SPX) Nov 21, 2017
Soil scientist from RUDN University (Russia) and his colleagues modeled how the expansion of the boundaries of the city of Moscow would affect the rural landscape in the next 30 years. Scientists came to an unexpected conclusion: urbanization can have a positive impact on the stocks of organic carbon in the soil. The results of the study are presented in the Journal of Cleaner Production.
Urbanization (the growth of cities and the expansion of urban landscapes) is responsible for large environmental changes worldwide. Traditionally, the impact of urbanization on the soils and environment in general has been seen as entirely negative - through pollution, salinization, soil sealing and the like. However, in fact the picture is more ambiguous. For example, the effect of urbanization on soil organic carbon (an extremely poorly studied process) can also be positive.
A soil scientist from RUDN University and his colleagues from Russia, the Netherlands and Italy conducted an innovative study. They estimated changes in soil organic carbon under different scenarios of urbanization (depending on environmental and socio-economic factors). The model was constructed on the basis of data on soil organic carbon and growth of urbanized areas of the city of Moscow from 1980 to 2014 (initial data), and further to 2048 (forecast).
Of course, the construction of houses, industrial plants and roads leads to the loss of carbon - the sealing of the soil (when tearing off its top layer) and the elimination of natural landscapes are to blame.
However, urbanization is not limited to these forces: new green areas, parks and squares are being created in cities, in which work is carried out to preserve and improve the properties of urban soils. In addition, all urban soils are fertilized, enriched by peat, compost and new plants. Finally, the inhabitants create a carbon-rich cultural layer on the soils (a kind of historical heritage of cities).
The researchers took into account all these factors and modeled the growth of Moscow agglomeration in the near future. According to their analysis, by 2048 the metropolitan area would grow by 8-81%, with the expansion rate of 30% as the most probable scenario. Up to two thousand square kilometers of forests, arable land and wetlands would be converted into urban areas.
As a result of urbanization, the highest increases in soil organic carbon stocks occur on the less fertile Orthic Podzols and Eutric Podzoluvisols, whereas the stocks in Orthic Luvisols, Luvic Chernozems, Dystric Histosols and Eutric Fluvisols increased less.
"The results of our study show the potential of urbanization for the increase of soil organic carbon stocks. This process, in turn, would probably mitigate the effects of climate change. The optimistic conclusion of our study should be further explored by land-use planners and scholars worldwide, since urbanization will be progressively more important in the future", - concludes Vyacheslav Vasenev, Ph.D., associate professor of the Agrobiotechnology Department of the RUDN University.
Hamm, Germany (AFP) Nov 13, 2017
A Peruvian farmer won a small but significant legal victory Monday when a German court said his appeal against energy giant RWE, which he accuses of contributing to climate change that is threatening his Andean home, had merit. After hearing oral arguments from both sides, the higher regional court in the western city of Hamm said Saul Luciano Lliuya's demand for damages from RWE was "admiss ... read more
Farming Today - Suppliers and Technology
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement|