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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="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">tinro</journal-id><journal-title-group><journal-title xml:lang="ru">Известия ТИНРО</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya TINRO</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1606-9919</issn><issn pub-type="epub">2658-5510</issn><publisher><publisher-name>ТИНРО</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26428/1606-9919-2026-206-553-576</article-id><article-id custom-type="edn" pub-id-type="custom">XYHUCV</article-id><article-id custom-type="elpub" pub-id-type="custom">tinro-1148</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="ru"><subject>УСЛОВИЯ ОБИТАНИЯ ПРОМЫСЛОВЫХ ОБЪЕКТОВ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ENVIRONMENTS OF FISHERIES RESOURCES</subject></subj-group></article-categories><title-group><article-title>Фенология весеннего «цветения» фитопланктона в морских водах вокруг Камчатки</article-title><trans-title-group xml:lang="en"><trans-title>Phenology of spring phytoplankton bloom in the marine waters around Kamchatka</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0000-1225-9579</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Малышева</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Malysheva</surname><given-names>Aleksandra S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Малышева Александра Сергеевна, старший специалист, аспирант,</p><p>105187, г. Москва, Окружной проезд, 19;</p><p>119991, г. Москва, Ленинские горы, 1.</p></bio><bio xml:lang="en"><p>Aleksandra S. Malysheva, Postgraduate Student, Senior Specialist,</p><p>19, Okruzhnoj proezd, Moscow, 105187;</p><p>1, Leninskie Gory, Moscow, 119991.</p></bio><email xlink:type="simple">malysheva@vniro.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8100-8095</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кивва</surname><given-names>К. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Kivva</surname><given-names>Kirill K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кивва Кирилл Константинович, кандидат географических наук, директор департамента,</p><p>105187, г. Москва, Окружной проезд, 19.</p></bio><bio xml:lang="en"><p>Kirill K. Kivva, Ph.D., Head of Department,</p><p>19, Okruzhnoj proezd, Moscow, 105187.</p></bio><email xlink:type="simple">kivva@vniro.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1007-2115</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сумкина</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Sumkina</surname><given-names>Aleksandra A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сумкина Александра Андреевна, кандидат географических наук, старший научный сотрудник, </p><p>105187, г. Москва, Окружной проезд, 19.</p></bio><bio xml:lang="en"><p>Aleksandra A. Sumkina, Ph.D., Senior Researcher,</p><p>19, Okruzhnoj proezd, Moscow, 105187.</p></bio><email xlink:type="simple">sumkina@vniro.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Всероссийский научно-исследовательский институт рыбного хозяйства и океанографии; Московский государственный университет им. М.В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian Federal Research Institute of Fisheries and Oceanography; Lomonosov Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Всероссийский научно-исследовательский институт рыбного хозяйства и океанографии</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian Federal Research Institute of Fisheries and Oceanography</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>17</day><month>10</month><year>2026</year></pub-date><volume>206</volume><issue>3</issue><fpage>553</fpage><lpage>576</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Малышева А.С., Кивва К.К., Сумкина А.А., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Малышева А.С., Кивва К.К., Сумкина А.А.</copyright-holder><copyright-holder xml:lang="en">Malysheva A.S., Kivva K.K., Sumkina A.A.</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://izvestiya.tinro-center.ru/jour/article/view/1148">https://izvestiya.tinro-center.ru/jour/article/view/1148</self-uri><abstract><p>Представлены многолетние оценки сроков и параметров весеннего «цветения» фитопланктона в водах вокруг Камчатского полуострова за 1998–2024 гг. на основе спутниковых данных по концентрации хлорофилла-α. Рассмотрены три метода определения сроков «цветения», предложен модифицированный метод, более подходящий для исследуемого района. Описаны характерные черты весеннего «цветения» у западного и восточного побережий Камчатки. Показана отрицательная значимая связь (до r = −0,9) даты начала весеннего «цветения» с его продолжительностью. В Тихом океане к востоку от Камчатки выявлен положительный тренд (до +2 сут в год) даты начала весеннего «цветения», что указывает на тенденцию к позднему развитию «цветения», тогда как в некоторых шельфовых районах (западная часть зал. Шелихова, кутовая часть Пенжинской губы, Карагинский залив) в целом, наоборот, тренд отрицательный (до −1,5 сут в год) весенние «цветения» происходят раньше. При этом в мористой части зал. Шелихова в районе Ямских островов «цветения» длятся дольше (до +1,5 сут в год). Во многих прибрежных районах зал. Шелихова «цветения» становятся более интенсивными (до +0,1 мг/м[<xref ref-type="bibr" rid="cit3">3</xref>] в год). Обнаружена статистически значимая корреляция фенологических параметров весеннего «цветения» с датой полного очищения ото льда в зал. Шелихова, локально вдоль западного побережья Камчатки и в Карагинском заливе.</p></abstract><trans-abstract xml:lang="en"><p>Timing and other phenological parameters of the spring phytoplankton bloom in the waters around Kamchatka are determined on long-term satellite-derived data for chlorophyll a concentration obtained in 1998–2024. Three methods of the timing determining are compared, as the biomass threshold, the cumulative biomass threshold, and the maximum biomass growth rate; finally, a modified threshold method is proposed, more suitable for the study area. Significant negative correlation (up to r = −0.9) between the spring bloom onset date and its duration is shown. Features of the spring blooms off the western and eastern coasts of Kamchatka are described. A tendency towards later start of the bloom is revealed in the Pacific waters (up to +2 days per year), but opposite tendency occurs in local areas at both coasts, as the western Shelikhov Bay, inner Penzhina Bay, and Karaginsky Bay (up to −1.5 days per year). The bloom tends to last longer (up to +1.5 days per year) in the outer Shelikhov Bay at Yamsky Islands, and becomes more intense (up to +0.1 mg/m3 per year) in many coastal areas of this bay. Phenological parameters of the spring bloom in the Shelikhov Bay, Karaginsky Bay, and some areas at the western coast of Kamchatka have statistically significant dependence on the timing of sea ice retreat.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>хлорофилл-α</kwd><kwd>фитопланктон</kwd><kwd>фенология</kwd><kwd>весеннее «цветение» фитопланктона</kwd><kwd>морской лед</kwd><kwd>даты полного очищения ото льда</kwd><kwd>Берингово море</kwd><kwd>Охотское море</kwd></kwd-group><kwd-group xml:lang="en"><kwd>chlorophyll α</kwd><kwd>phytoplankton</kwd><kwd>phenology</kwd><kwd>spring phytoplankton bloom</kwd><kwd>sea ice</kwd><kwd>ice retreat</kwd><kwd>Bering Sea</kwd><kwd>Okhotsk Sea</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено в рамках гранта РНФ № 25-27-00385.</funding-statement><funding-statement xml:lang="en">The study was funded by Russian Science Foundation, project № 25-27-00385.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Биология океана. 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