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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">gesj</journal-id><journal-title-group><journal-title xml:lang="en">GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY</journal-title><trans-title-group xml:lang="ru"><trans-title>GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2071-9388</issn><issn pub-type="epub">2542-1565</issn><publisher><publisher-name>Russian Geographical Society</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.24057/2071-9388-2010-3-4-54-59</article-id><article-id custom-type="elpub" pub-id-type="custom">gesj-238</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ENVIRONMENT</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Окружающая среда</subject></subj-group></article-categories><title-group><article-title>DETERMINATION OF HYDRO-ECOLOGICAL FACTORS OF THE VOLGA-CASPIAN AQUATIC ECOSYSTEMS STABILITY IN DESIGNING THEIR PROTECTION</article-title><trans-title-group xml:lang="ru"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Mitina</surname><given-names>Natalia</given-names></name></name-alternatives><bio xml:lang="en"/><email xlink:type="simple">natalia_mitina@mail.ru</email></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Malashenkov</surname><given-names>Boris</given-names></name></name-alternatives><bio xml:lang="en"/></contrib></contrib-group><pub-date pub-type="collection"><year>2010</year></pub-date><pub-date pub-type="epub"><day>01</day><month>12</month><year>2010</year></pub-date><volume>3</volume><issue>4</issue><fpage>54</fpage><lpage>59</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Mitina N., Malashenkov B., 2010</copyright-statement><copyright-year>2010</copyright-year><copyright-holder xml:lang="ru">Mitina N., Malashenkov B.</copyright-holder><copyright-holder xml:lang="en">Mitina N., Malashenkov B.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://ges.rgo.ru/jour/article/view/238">https://ges.rgo.ru/jour/article/view/238</self-uri><abstract/><kwd-group xml:lang="en"><kwd>Volga River</kwd><kwd>the Caspian Sea</kwd><kwd>aquatic ecosystems stability</kwd><kwd>hydro-ecological factors</kwd><kwd>climate change</kwd><kwd>sturgeon distribution</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Ivanov, V. 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