 |
| Titel |
Lytic viral infection of bacterioplankton in deep waters of the western Pacific Ocean |
| VerfasserIn |
Y. Li, T. Luo, J. Sun, L. Cai, Y. Liang, N. Jiao, R. Zhang |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1726-4170
|
| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 11, no. 9 ; Nr. 11, no. 9 (2014-05-13), S.2531-2542 |
| Datensatznummer |
250117398
|
| Publikation (Nr.) |
 copernicus.org/bg-11-2531-2014.pdf |
|
|
|
|
|
| Zusammenfassung |
| As the most abundant biological entities in the ocean, viruses influence host
mortality and nutrient recycling mainly through lytic infection. Yet, the
ecological characteristics of virioplankton and viral impacts on host
mortality and biogeochemical cycling in the deep sea are largely unknown. In
the present study, viral abundance and lytic infection were investigated
throughout the water column in the western Pacific Ocean. Both the
prokaryotic and viral abundance and production showed a significantly
decreasing trend from epipelagic to meso- and bathypelagic waters. Viral
abundance decreased from 0.36–1.05 × 1010 particles L−1
to 0.43–0.80 × 109 particles L−1, while the
virus : prokaryote ratio varied from 7.21 to
16.23 to 2.45–23.40, at the surface and 2000 m, respectively. Lytic viral
production rates in surface and 2000 m waters were, on average,
1.03 × 1010 L−1 day−1 and
5.74 × 108 L−1 day−1. Relatively high percentages of
prokaryotic cells lysed by viruses at 1000 and 2000 m were observed,
suggesting a significant contribution of viruses to prokaryotic mortality in
the deep ocean. The carbon released by viral lysis in deep western Pacific
Ocean waters was from 0.03 to 2.32 μg C L−1 day−1. Our
findings demonstrated a highly dynamic and active viral population in these
deep waters and suggested that virioplankton play an important role in the
microbial loop and subsequently biogeochemical cycling in deep oceans. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|