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Rethinking the marine carbon cycle: Factoring in the multifarious lifestyles of microbes
Worden, A.Z.; Follows, M.J.; Giovannoni, S.J.; Wilken, S.; Zimmerman, A.; Keeling, P.J. (2015). Rethinking the marine carbon cycle: Factoring in the multifarious lifestyles of microbes. Science (Wash.) 347(6223): 735 [1257594-1-10]. hdl.handle.net/10.1126/science.1257594
In: Science (Washington). American Association for the Advancement of Science: New York, N.Y. ISSN 0036-8075, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Worden, A.Z.
  • Follows, M.J.
  • Giovannoni, S.J.
  • Wilken, S.
  • Zimmerman, A.
  • Keeling, P.J.

Abstract
    Marine ecosystems are composed of a diverse array of life forms, the majority of which are unicellular—archaea, bacteria, and eukaryotes. The power of these microbes to process carbon, shape Earth’s atmosphere, and fuel marine food webs has been established over the past 40 years. The marine biosphere is responsible for approximately half of global primary production, rivaling that of land plants. Unicellular eukaryotes (protists) are major contributors to this ocean productivity. In addition to photosynthetic growth, protists exhibit a range of other trophic modes, including predation, mixotrophy (a combination of photosynthetic and predatory-based nutrition), parasitism, symbiosis, osmotrophy, and saprotrophy (wherein extracellular enzymes break down organic matter to smaller compounds that are then transported into the cell by osmotrophy).

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