Dissolved Organic Matter (DOM) is a major factor controlling global
biogeochemical cycles of carbon, macro- and micronutrients and
toxic metals. It plays a pivotal role both in mobilisation
(chemical weathering), transport (organic complexes and colloids),
biological uptake and deposition (microbial and photo-degradation)
of a number of essential macro- (C, N, P) and micro- (Fe, Zn, Mn,
Ni, Cu Co) nutrients. The interest of scientists to DOM is rapidly
increasing. Between 1950 and 2017, more than 30,000 scientific
papers on DOM were published (Web of Science (R) All Database
Search); however, more than half of them were produced over the
past nine years and over the last two and a half years, more than
5,400 papers were published. Such attention to DOM is clearly
motivated by a combination of global climate change issues and the
main role of DOM in CO2 exchange between the atmosphere and the
surface waters. Despite such a large range of scientific problems
concerning DOM properties, origins, and applications, there is a
very strong geographical bias in terms of the amount of research
devoted to various geographical regions of the world. The majority
of information concerns temperate zones and boreal regions of
Scandinavia and Northern America, with very little information
available on Siberia and Russia. Thus, among the less than 30,000
scientific articles devoted to various aspects of DOM since 1950,
only 150-200 of them are devoted to DOM in Russia or Siberia. This
book is essentially oriented towards filling these gaps of our
knowledge. Among thirteen chapters, eleven of them are devoted to
various aspects of DOM in Russia and Siberia. Another important and
still poorly characterised aspect of natural DOM is its colloidal
status: four chapters of this book deal with the colloidal
speciation of DOM in rivers and lakes. Given the breadth of
physico-chemical, geochemical, biological, and geographical aspects
of DOM covered in this book, it will be useful for a large audience
of environmental scientists, limnologists, physico-chemists, soil
and landscape scientists and biogeochemists.
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