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ECOLOGY: Dipping into the Rare Biosphere

Access to the article is free, however registration and sign-in are required. How can we explore the "seed-bank" of rare microbial species in marine environments? When molecular methods were introduced into microbial ecology in the mid-1980s, there were two surprises: Most DNA sequences found bore no resemblance to organisms known from cell culture, and the microorganisms that could be cultured were almost never found in molecular surveys. These findings indicated that microbial diversity is much larger than had been anticipated. It also revealed that some bacteria occur at such low abundance that molecular techniques cannot detect them. In the meantime, marine microbiology has become an extremely active and innovative field. For example, two reports by Markert et al. and Not et al., demonstrate that current molecular techniques can suggest geographic distribution and characterize the symbiotic relationships that enable organisms to survive in extreme habitats. Morever, recent advances in sequencing technology are beginning to open our eyes to the huge dimensions of the microbial diversity hidden in nature.

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Resource Type: Image, Journal article/Issue, Review
Audience Level: Undergraduate lower division 13-14, Undergraduate upper division 15-16, Graduate

Author and Copyright


Authors and Editors: Carlos Pedrós-Alió of Department of Marine Biology and Oceanography, Institut de Ciències del Mar
Publisher: AAAS
Format: text/html
Copyright and other restrictions: Yes
Cost: No

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