کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4683357 1349300 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Resting cells of microorganisms in the 20–100 μm fraction of marine sediments in an Antarctic coastal area
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
پیش نمایش صفحه اول مقاله
Resting cells of microorganisms in the 20–100 μm fraction of marine sediments in an Antarctic coastal area
چکیده انگلیسی

We investigated the morphological features, vertical sinking fluxes, and number densities of the resting cells of ice-associated microorganisms in the 20–100 μm fraction of natural marine sediments collected from ice-covered and ice-free areas around Syowa Station, Lützow-Holm Bay, East Antarctica. We identified the resting cells of various taxonomic groups, including the spores of a diatom, cysts of three dinoflagellates, cysts of five oligotrich ciliates, and the eggs of a mesozooplankton. This is the first report of oligotrich ciliate cysts from Antarctic waters. The resting spores of Thalassiosira australis (diatom), cysts of Polarella glacialis (dinoflagellate), and egg type 1 sink to the bottom sediment during summer. Our results suggest that some planktonic and ice-associated microorganisms in Antarctic coastal areas send their resting cells to the bottom sediments as seed populations for the following generation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polar Science - Volume 2, Issue 1, March 2008, Pages 27–32
نویسندگان
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