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Microalgal classes and their signature pigments
The microalgae that make up the extensive phytoplankton pastures of the world's oceans originated in ancient evolutionary times. They obtained their primitive ‘plastids’ from an unknown ancestral cyanobacterium with photosynthetic oxygen-evolving capabilities (Bhattacharya, 1997; Delwiche, 1999; McFadden, 2001; Palmer, 2003; Keeling, 2004a, b). Serial symbioses within heterotrophic hosts gave rise to the present wide diversity of photosynthetic microalgae, which evolved a range of photosynthetic pigments capable of collectively harvesting most of the wavelengths of light available to them in underwater marine habitats (Jeffrey and Wright, 2006). At the present time, the marine phytoplankton contribute at least a quarter of the biomass of the world's vegetation, and constitute the base of the food web that supports either directly or indirectly all the animal populations of the open sea. Some microalgae also contribute significantly to climatic processes, providing nuclei for atmospheric water condensation (Aiken et al., 1992). All microalgae, by their photosynthetic activities, contribute to atmospheric carbon dioxide ‘draw-down’ (Jeffrey and Mantoura, 1997), thus helping to ameliorate green-house gases, by removing nearly a third of the anthropogenic carbon released to the atmosphere (Sabine and Feely, 2007).
History
Publication title
Phytoplankton Pigments: Characterization, Chemotaxonomy and Applications in OceanographyEditors
S Roy, C A. Llewellyn, ES Egeland and G JohnsenPagination
3-77ISBN
9780511732263Department/School
Institute for Marine and Antarctic StudiesPublisher
Cambridge University PressPlace of publication
United KingdomExtent
15Rights statement
Copyright 2011 Scientific Committee on Oceanic Research (SCOR)and Cambridge University PressRepository Status
- Restricted