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The territory of the North-East of Russia plays an important role in the climate system of the planet. It is a great reserve of the biosphere and performs ecological functions at the global scale. Modern observations and models suggest that under global climate change the temperature increase will be greatest in this region, and the response of cryolithozone could be significant. The resulting changes in water, nitrogen, energy, and carbon cycles may have positive feedbacks which could further enhance the global warming. In 2016 we will celebrate the 25th anniversary of the Russian-Japanese research collaboration on global change studies in Russian permafrost. A multilateral international scientific cooperation has been developed during 25 years on the problem of mitigating the effects of global climate change in the vast permafrost region of North-East Russia. A unique scientific system “SakhaFluxNet” has been established, in the framework of over 40 international and intergovernmental scientific and educational projects (with 14 countries), to parameterize the components of permafrost ecosystems using modern innovative measurement and analysis techniques. Such an extensive network of monitoring stations is the only one in North-East Russia, and the scope of ecosystem biogeochemical and climatic studies is beyond competition in the Russian Federation. The monitoring stations are simultaneously included in the international scientific networks GlobalCarbon, EuroFlux, INTERACT, PAGE21, ScanNet and AsiaFlux. The unique network of scientific stations “SakhaFluхNet” covers all the main bioclimatic zones in North-East Russia – tundra, forest-tundra and taiga. It includes the infrastructure of fully equipped research stations – "Spasskaya Pad", "Tungulu" and "Neleger" in Central Yakutia, "Elgeeii" in South-Eastern Yakutia, "Chokurdakh" and "Kodac" in the tundra zone of North-Eastern Yakutia. Over 80 symposiums and meetings abroad, more than 10 international conferences in Russia and abroad were carried out, and over 20 thematic special issues (including 16 abroad) were published on the results of our long-term studies. The symposium will be attended by ecologists, biologists, climatologists and other interested scientists and experts from Russia and foreign countries. This is an excellent opportunity of direct communication among scientists and discussion on a wide range of problems.