Zobrazeno 1 - 10
of 432
pro vyhledávání: '"Andrew H. Knoll"'
Autor:
Marjorie D. Cantine, Alan D. Rooney, Andrew H. Knoll, Irene Gómez-Pérez, Badar al Baloushi, Kristin D. Bergmann
Publikováno v:
Communications Earth & Environment, Vol 5, Iss 1, Pp 1-9 (2024)
Abstract Determining causal relationships between environmental change and early animal evolution has been limited by our lack of a robust temporal framework for the Ediacaran Period (635-539 million years ago). Here we present six new radioisotopic
Externí odkaz:
https://doaj.org/article/5c01f7bc94084bad9b67f467664ffaaa
Autor:
Richard J. Knecht, Jacob S. Benner, Anshuman Swain, Lauren Azevedo-Schmidt, Christopher J. Cleal, Conrad C. Labandeira, Michael S. Engel, Jason A. Dunlop, Paul A. Selden, Cortland F. Eble, Mark D. Renczkowski, Dillon A. Wheeler, Mataeus M. Funderburk, Steve L. Emma, Andrew H. Knoll, Naomi E. Pierce
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-13 (2024)
Abstract Much of what we know about terrestrial life during the Carboniferous Period comes from Middle Pennsylvanian (~315–307 Mya) Coal Measures deposited in low-lying wetland environments1–5. We know relatively little about terrestrial ecosyste
Externí odkaz:
https://doaj.org/article/3db49f3aab1e49ff9f16c66fe22a47ea
Publikováno v:
BMC Biology, Vol 22, Iss 1, Pp 1-21 (2024)
Abstract Background Throughout its nearly four-billion-year history, life has undergone evolutionary transitions in which simpler subunits have become integrated to form a more complex whole. Many of these transitions opened the door to innovations t
Externí odkaz:
https://doaj.org/article/d52a6c6456724831b55a3da49389555d
Autor:
Christine Strullu-Derrien, Frédéric Fercoq, Marc Gèze, Paul Kenrick, Florent Martos, Marc-André Selosse, Karim Benzerara, Andrew H. Knoll
Publikováno v:
iScience, Vol 26, Iss 8, Pp 107338- (2023)
Summary: Cyanobacteria have a long evolutionary history, well documented in marine rocks. They are also abundant and diverse in terrestrial environments; however, although phylogenies suggest that the group colonized land early in its history, paleon
Externí odkaz:
https://doaj.org/article/f59a560935b7470f8435c35caf0fc6d6
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-9 (2021)
The Great Oxygenation Event (GOE) 2.4 billion years ago is believed to have been critical for the evolution of complex life. Here, Olejarz et al. propose a model suggesting that competition between major bacterial groups could have triggered the GOE
Externí odkaz:
https://doaj.org/article/07ddd4bbcf9f4698a58789e9cc9dfac7
Publikováno v:
Frontiers in Marine Science, Vol 9 (2022)
In today’s oceans, diatoms are abundant and diverse primary producers distinguished by their silica shells. Although molecular clocks suggest that diatoms arose as much as 250 million years ago (Ma), the earliest known diatom fossils date from 190
Externí odkaz:
https://doaj.org/article/a835487c87d94248ada31e328c055d34
Autor:
Theodore M. Present, Maya L. Gomes, Elizabeth J. Trower, Nathan T. Stein, Usha F. Lingappa, John Naviaux, Michael T. Thorpe, Marjorie D. Cantine, Woodward W. Fischer, Andrew H. Knoll, John P. Grotzinger
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021)
Present et al. examine the processes controlling lithification of microbial mats in a Caribbean peritidal carbonate environment. The authors present sedimentological and geochemical evidence of a surprising bias against preserving the most robust, wi
Externí odkaz:
https://doaj.org/article/c78b63d357334a5e8bafcbdde0947a77
Autor:
Xiao-Ming Liu, Linda C. Kah, Andrew H. Knoll, Huan Cui, Chao Wang, Andrey Bekker, Robert M. Hazen
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-7 (2021)
Constraining the rise in atmospheric oxygen through the early Earth is important to understand the evolution of complex life. Here, the authors find that a major rise in atmospheric oxygen level occurred after the Great Oxidation Event, followed by p
Externí odkaz:
https://doaj.org/article/1da948754dc94f91a9860168ce6799f3
Autor:
A. D. Muscente, Natalia Bykova, Thomas H. Boag, Luis A. Buatois, M. Gabriela Mángano, Ahmed Eleish, Anirudh Prabhu, Feifei Pan, Michael B. Meyer, James D. Schiffbauer, Peter Fox, Robert M. Hazen, Andrew H. Knoll
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-15 (2019)
The Ediacara biota—the first large, complex organisms to evolve on Earth—disappeared prior to the radiation of animals during the Cambrian Period. Here, Muscente et al. perform network analysis of Ediacaran fossils and show that there were two gl
Externí odkaz:
https://doaj.org/article/d453edac59064b5082ad2bd57ccc155a
Autor:
Maya L. Gomes, Leigh Anne Riedman, Shane O’Reilly, Usha Lingappa, Kyle Metcalfe, David A. Fike, John P. Grotzinger, Woodward W. Fischer, Andrew H. Knoll
Publikováno v:
Frontiers in Earth Science, Vol 8 (2020)
Microbial mats are taxonomically and metabolically diverse microbial ecosystems, with a characteristic layering that reflects vertical gradients in light and oxygen availability. Silicified microbial mats in Proterozoic carbonate successions are gene
Externí odkaz:
https://doaj.org/article/4fb961fc0d27464fa82c345232dc9b20