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Океанология, 2023, T. 63, № 4, стр. 634-642

Структура и пространственное распределение мезозоопланктонных сообществ в Атлантическом секторе Южного океана

В. В. Касьян *

Национальный научный центр морской биологии им. А.В. Жирмунского ДВО РАН
Владивосток, Россия

* E-mail: valentina-k@yandex.ru

Поступила в редакцию 02.12.22
После доработки 13.12.2022
Принята к публикации 15.02.2023

Аннотация

В работе приведены результаты исследования мезозоопланктона у побережья Антарктического п-ова, в проливах Брансфилда и Антарктик, в бассейне Пауэлла моря Уэдделла и у Ю. Оркнейских о-вов в период южного лета 2022 г. Сообщества мезозоопланктона представлены двумя лидирующими группами с доминантными таксонами: копеподы (Oithona spp., Metridia gerlachei и Calanoides acutus) и эвфаузииды (Euphausia superba). Максимальные значения численности и биомассы мезозоопланктона отмечены над глубоководными желобами у Ю. Оркнейских о-вов в теплой Антарктической поверхностной воде (AASW), минимальные значения – у Антарктического п-ова в холодных модифицированных водах моря Уэдделла (TWW). Максимальные концентрации копепод наблюдались в прол. Брансфилда у Ю. Шетландских о-вов при поверхностной температуре (SST) –0.5–0.5°С и солености (SSS) 34.5–34.6‰; икры и личинок E. superba на разных стадиях развития – у Ю. Оркнейских о-вов при значениях SST 1–2°С и SSS 34.3–34.5‰. Выделены четыре группы сообществ, различающиеся по составу, обилию и доминированию таксонов. Результаты исследований имеют значение для мониторинга экосистемы Южного океана.

Ключевые слова: мезозоопланктон, копеподы, Euphausia superba, Атлантический сектор, Южный океан

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