Исследование микробных сообществ в подповерхностных слоях донных отложений шельфовой и глубоководной зоны Чёрного моря с использованием секвенирования Oxford Nanopore
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Аннотация
Проведён анализ бактериальных сообществ, присутствующих в подповерхностных слоях донных осадков глубоководной котловины и шельфовой зоны Чёрного моря. Целью исследования было продемонстрировать, что эти отложения, сформированные в разных условиях придонных вод (восстановительных — из-за наличия сероводорода в глубоководной части моря на глубине 2030 м, окислительных — в кислородсодержащих шельфовых морских водах на глубине 49 м), служат средой обитания для различных микробных сообществ. ДНК извлечена из разных слоёв осадков, затем амплифицирована с помощью ПЦР. Далее проведено секвенирование методом Oxford Nanopore. Анализ выявил в общей сложности 28 классифицированных бактериальных филотипов, из которых 24 присутствуют в обеих зонах, а 1 специфичен для глубоководной сероводородной зоны осадков. Впервые установлены 335 представителей из 171 семейства. Специфичными для шельфовых осадков кислородной зоны Чёрного моря оказались 37 семейств, а только в подповерхностных отложениях сероводородной глубоководной зоны обнаружены 46 семейств. Кроме того, 88 семейств встречались в обеих зонах. Результаты свидетельствуют о тόм, что две зоны Чёрного моря действительно содержат разные микробные сообщества с более разнообразной жизнью на шельфе, и указывают на потенциал будущих исследований роли этих сообществ в биогеохимических циклах.
Авторы
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