کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9479751 | 1326155 | 2005 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High abundances of viruses in a deep-sea hydrothermal vent system indicates viral mediated microbial mortality
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Little is known about the distribution and abundance of viruses at deep-sea hydrothermal vents. Based on estimates made using epifluorescence microscopy and the dye YoPro-1, much higher viral abundances were observed at active hydrothermal vents than in the surrounding deep sea. This indicates that viral production was occurring and that viruses were a source of microbial mortality. Samples collected from three actively venting sites (Clam Bed, S&M and Salut) within the Endeavour Ridge system off the west coast of North America had viral abundances ranging from 1.45Ã105 to 9.90Ã107 mlâ1, while the abundances of prokaryotes ranged from 1.30Ã105 to 4.46Ã106 mlâ1. The abundances of viruses and prokaryotes in samples collected along the neutrally buoyant plume associated with the Main Endeavour Field were lower than at actively venting sites, with a mean of 5.3Ã105 prokaryotes mlâ1 (s.d. 2.9Ã105, n=64) and 3.50Ã106 viruses mlâ1 (s.d. 1.89Ã106, n=64), but were higher than non-plume samples (2.7Ã105 prokaryotes mlâ1, s.d. 5.0Ã104, n=15 and 2.94Ã106 viruses mlâ1, s.d. 1.08Ã106, n=15). Prokaryotic and viral abundances in non-hydrothermal regions were as much as 10-fold higher than found in previous studies, in which sample fixation likely resulted in underestimates. This suggests that viral infection may be a greater source of prokaryotic mortality throughout the deep sea than previously recognized. Overall, our results indicate that virus-mediated mortality of prokaryotes at these hydrothermal-vent environments is significant and may reduce energy flow to higher trophic levels.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Deep Sea Research Part I: Oceanographic Research Papers - Volume 52, Issue 8, August 2005, Pages 1515-1527
Journal: Deep Sea Research Part I: Oceanographic Research Papers - Volume 52, Issue 8, August 2005, Pages 1515-1527
نویسندگان
Alice C. Ortmann, Curtis A. Suttle,