DOI: 10.1111/gbi.12145
Scopus记录号: 2-s2.0-84937978924
论文题名: Grain trapping by filamentous cyanobacterial and algal mats: Implications for stromatolite microfabrics through time
作者: Frantz C.M. ; Petryshyn V.A. ; Corsetti F.A.
刊名: Geobiology
ISSN: 1472-4677
EISSN: 1472-4669
出版年: 2015
卷: 13, 期: 5 起始页码: 409
结束页码: 423
语种: 英语
Scopus关键词: filamentous alga
; grain size
; algae
; Cyanobacteria
; particulate matter
; cell adhesion
; cyanobacterium
; green alga
; growth, development and aging
; microbiology
; particulate matter
; physical chemistry
; physiology
; sediment
; time factor
; Cell Adhesion
; Chlorophyta
; Cyanobacteria
; Geologic Sediments
; Particulate Matter
; Physicochemical Phenomena
; Time Factors
Scopus学科分类: Earth and Planetary Sciences: General Earth and Planetary Sciences
; Environmental Science: General Environmental Science
; Agricultural and Biological Sciences: Ecology, Evolution, Behavior and Systematic
英文摘要: Archean and Proterozoic stromatolites are sparry or fine-grained and finely laminated; coarse-grained stromatolites, such as many found in modern marine systems, do not appear until quite late in the fossil record. The cause of this textural change and its relevance to understanding the evolutionary history of stromatolites is unclear. Cyanobacteria are typically considered the dominant stromatolite builders through time, but studies demonstrating the trapping and binding abilities of cyanobacterial mats are limited. With this in mind, we conducted experiments to test the grain trapping and binding capabilities of filamentous cyanobacterial mats and trapping in larger filamentous algal mats in order to better understand grain size trends in stromatolites. Mats were cut into squares, inclined in saltwater tanks at angles from 0 to 75° (approximating the angle of lamina in typical stromatolites), and grains of various sizes (fine sand, coarse sand, and fine pebbles) were delivered to their surface. Trapping of grains by the cyanobacterial mats depended strongly on (i) how far filaments protruded from the sediment surface, (ii) grain size, and (iii) the mat's incline angle. The cyanobacterial mats were much more effective at trapping fine grains beyond the abiotic slide angle than larger grains. In addition, the cyanobacterial mats actively bound grains of all sizes over time. In contrast, the much larger algal mats trapped medium and coarse grains at all angles. Our experiments suggest that (i) the presence of detrital grains beyond the abiotic slide angle can be considered a biosignature in ancient stromatolites where biogenicity is in question, and, (ii) where coarse grains are present within stromatolite laminae at angles beyond the abiotic angle of slide (e.g., most modern marine stromatolites), typical cyanobacterial-type mats are probably not solely responsible for the construction, giving insight into the evolution of stromatolite microfabrics through time. © 2015 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/85131
Appears in Collections: 影响、适应和脆弱性
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作者单位: Applied Physics Laboratory, University of Washington, Seattle, WA, United States; Department of Earth Sciences, University of Southern California, Los Angeles, CA, United States; Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA, United States
Recommended Citation:
Frantz C.M.,Petryshyn V.A.,Corsetti F.A.. Grain trapping by filamentous cyanobacterial and algal mats: Implications for stromatolite microfabrics through time[J]. Geobiology,2015-01-01,13(5)