| 词条 | Avalon explosion |
| 释义 |
The Avalon explosion, named from the Precambrian fauna of the Avalon Peninsula, is a proposed evolutionary radiation in the history of the Animalia, about 575 million years ago, some 33 million years earlier than the Cambrian explosion. EvidenceTrace fossils of these Avalon organisms have been found worldwide, and represent the earliest known complex multicellular organisms.[1] The Avalon explosion produced the Ediacaran biota.[2][3] The biota largely disappeared contemporaneously with the rapid increase in biodiversity known as the Cambrian explosion. The Avalon explosion appears similar to the Cambrian explosion in the rapid increase in diversity of morphologies in a relatively small time frame, followed by diversification within the established body plans,[3][4] a pattern similar to that observed in other evolutionary events.[4] HistoryThe Avalon explosion was proposed in 2008 by Virginia Tech paleontologists through the analysis of the morphological space change in several Ediacaran assemblages.[3] The discovery suggests that in the early evolution of animals, there may have been more than one explosive event.[5] The original analysis has been the subject of dispute in the literature.[6][7][8] Notes{{notelist}}References1. ^Simple multicellular organisms such as red algae evolved at least {{Ma|1200}}. 2. ^{{Cite press release |url=https://www.sciencedaily.com/releases/2008/01/080103144451.htm |title=Two Explosive Evolutionary Events Shaped Early History Of Multicellular Life |publisher=Virginia Tech|date=January 4, 2008|via=ScienceDaily |language=en |access-date=2018-03-06}} 3. ^1 2 {{Cite journal |last=Shen |first=Bing |last2=Dong |first2=Lin |last3=Xiao |first3=Shuhai |last4=Kowalewski |first4=Michał |date=4 January 2008 |title=The Avalon Explosion: Evolution of Ediacara Morphospace |journal=Science |language=en |volume=319 |issue=5859 |pages=81–84 |bibcode=2008Sci...319...81S |doi=10.1126/science.1150279 |issn=0036-8075 |pmid=18174439}} 4. ^1 {{Cite journal |last=Xiao |first=Shuhai |last2=Laflamme |first2=Marc |date=January 2009 |title=On the eve of animal radiation: phylogeny, ecology and evolution of the Ediacara biota |journal=Trends in Ecology & Evolution |volume=24 |issue=1 |pages=31–40 |doi=10.1016/j.tree.2008.07.015 |pmid=18952316}} 5. ^{{Cite web |url=http://www.astrobio.net/pressrelease/2580/the-avalon-explosion |title=The Avalon Explosion |date=8 January 2008 |publisher=Astrobiology Magazine |access-date=June 14, 2012}} 6. ^{{Cite journal |last=Freeman |first=Gary |title=The rise of bilaterians |journal=Historical Biology |volume=21 |issue=1–2 |pages=99–114 |doi=10.1080/08912960903295843|year=2009 }} 7. ^{{Cite journal |last=Xiao |first=Shuhai |last2=Kowalewski |first2=Michał |last3=Shen |first3=Bing |last4=Dong |first4=Lin |last5=Laflamme |first5=Marc |date=8 January 2010 |title=The rise of bilaterians: a reply |journal=Historical Biology |volume=21 |issue=3–4 |pages=239–246 |doi=10.1080/08912960903471659}} 8. ^{{Cite journal |last=Freeman |first=Gary |date=30 Jun 2010 |title=Comment on Xiao et al. (2009), response to: the rise of bilaterians |journal=Historical Biology |volume=22 |issue=4 |pages=430–432 |doi=10.1080/08912960903562259}} External links
4 : Evolution|Unsolved problems in biology|Ediacaran biota|Biological hypotheses |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。