The role of sunlight in the removal and repair of viruses in the sea
Article Abstract:
A model has been developed to balance viral production and decay with light-dependent repair in aquatic viral communities. Infectivity is apparently restored to 39-78% of sunlight-damaged viruses each day by host-mediated repair. Lysis of 6-52% of daily bacterial production is needed to balance the viral particle removal with new virus production. The viral lysis of bacterioplankton may represent a significant nutrient source for the microbial cycle. Offshore bacterial communities have less diversity and less selection for resistance to viral infection.
Publication Name: Limnology and Oceanography
Subject: Earth sciences
ISSN: 0024-3590
Year: 1998
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Vertical distribution and temporal variation of marine planktonic archaea in the Gerlache Strait, Antarctica, during early spring
Article Abstract:
Sampling was performed at the Gerlache Strait of the Antarctic Peninsula during the initial stages of austral spring algal development. Prokaryotes were more abundant at the surface than at depth. Based on leucine incorporation, prokaryotic activity was low at the surface, becoming extremely low at 500 m. All samples contained archaeal rRNA, but more was found at depth than at surface. The study indicated that planktonic archaea are abundant and that they constitute a significant factor in Antarctic Peninsula marine picoplankton assemblages.
Publication Name: Limnology and Oceanography
Subject: Earth sciences
ISSN: 0024-3590
Year: 1998
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Evidence for the importance of catechol-type siderophores in the iron-limited growth of a cyanobacterium
Article Abstract:
Catechol-type siderophores may be produced by cyanobacteria to assist in iron acquisition in a low-iron environment. The effect is seen with the halo-tolerant cyanobacterium Synechococcus sp. PCC 7002. Bovine serum albumin was used to inhibit iron transport mediation by catechol-type siderophores, and both growth rates and photosynthetic pigments declined markedly in cultures where iron was limited but not in cultures replete with iron.
Publication Name: Limnology and Oceanography
Subject: Earth sciences
ISSN: 0024-3590
Year: 1998
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