. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. A. Figure 2. (A) Microbial mat morphologies observed on Twin Cays. Panels A-l and A-2 show mats growing atop thin organic layers that overlay peat. Panels A-4 and A-5 show thin mats growing directly on top of peat. Panels A-3 and A-6 show mats from the SCC (3) and WP (6) sites. (B) Examples of the resident cyanobacteria in Twin Cays microbial mats: 1-Chroococcus sp.; 2-Microcoleus sp.; 3-Nodularia sp. (with opaque sheath); 4- Johannesbaptista sp.; 5-Aphanocapsa sp.; 6- Lyngbya sp. (thicker single filaments


. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. A. Figure 2. (A) Microbial mat morphologies observed on Twin Cays. Panels A-l and A-2 show mats growing atop thin organic layers that overlay peat. Panels A-4 and A-5 show thin mats growing directly on top of peat. Panels A-3 and A-6 show mats from the SCC (3) and WP (6) sites. (B) Examples of the resident cyanobacteria in Twin Cays microbial mats: 1-Chroococcus sp.; 2-Microcoleus sp.; 3-Nodularia sp. (with opaque sheath); 4- Johannesbaptista sp.; 5-Aphanocapsa sp.; 6- Lyngbya sp. (thicker single filaments) and Microcoleus sp. (thin, multiple filaments within a sheath); 7-Johannesbaptista sp.; 8-Gloeocapsa sp.; and 9-Nodularia sp. (with clear sheath).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Press; National Research Council (U. S. ). Pacific Science Board; Smithsonian Institution; National Museum of Natural History (U. S. ); United States. Bureau of Sport Fisheries and Wildlife. Washington, D. C. : [Smithsonian Press]


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