Unformatted text preview: ria comprise a substantial component of plankton i b il flk biomass and production in estuarine systems. Cyanobacteria b
• • • • • • • • • • • Major groups of cyanobacteria Prochlorococcus, Synechococcus, Trichodesmium Microcystis Cylindrospermopsis
– Characteristics: unicellular, , filamentous, colonial – 2 layer cell wall-inner murein and outer lipoprotein – Some species fix N2 Nitrogen
• Limiting to most terrestrial and marine systems • N2 gas constitutes 78% of the atmosphere - Primary source of N f - Ironically, not directly available to plants and animals • Depend on microbes to convert to available forms - Little bit fixed by lightning • Human Influence - Fertilizer Nitrogen
• • • • • • • Microbes decompose proteins from dead cells and release Aas Ammonia (NH4) is...
View Full Document
This note was uploaded on 01/03/2009 for the course ENST 471 taught by Professor Noble,rachael during the Spring '08 term at UNC.
- Spring '08