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Bacterial Stromatolites: Origin of Laminations | | William N Doemel
; Thomas D Brock
; | | Date: |
7 Jun 1974 | | Journal: | Science, 184 (4141), 1083-1085 | | Abstract: | Laminated mats composed of motile filamentous photosynthetic bacteria and nonmotile unicellular blue-green algae occur in a large number of Yellowstone hot springs at temperatures between 55 degrees and 70 degrees C. Field studies indicate that the bacteria are the predominant mat-forming component. Under low light intensities, mats composed exclusively of bacteria can be formed. The bacteria undergo a diurnal migration, moving on top of the algae dnring the night and becolming mixed again with the algae during the day of differential migration of the bacteria in daily response to reduced light intensities. This response to light is exactly opposite to that previously reported for filamentous stromatolite-forming, blue-green algae, but the net result is the same-formation of a laminated mat. | | Source: | PubMed, pmid17736194 doi: 10.1126/science.184.4141.1083 | | Services: | Forum | Review | Favorites | |
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