قالب وردپرس درنا توس
Home https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Science https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ The study explains the universal model in fossil data

The study explains the universal model in fossil data



  New Normal: Exploration Explains Universal Model in Fossil Rivers
Illustration of marine fossils that existed from the Cambrian. The taxa presented include brachypods, trilobites, ammonites, bivalves and decapods. Sincerely to: Mesa Shumacher / Santa Fe Institute

Throughout the history of life on earth, biodiversity has passed through tides ̵

1; periods of rapid evolution and dramatic disappearances. This we know at least partly through the fossils of the marine invertebrates abandoned after the Cambrian period. It is remarkable that the extreme events of diversification and disappearance occur more often than the typical Gaussian distribution. Instead of the typical bell-shaped curve, the fossils show a distribution of thickness with extreme, extraordinary events that occur with a higher probability than expected.


While scientists have long known about this unusual model in record fossils, they struggle to explain it. Many casual processes that take place over a long time with large sample sizes, from processes that produce school grades to the height of the population, are collected in general Gaussian distribution. "This is a very reasonable expectation by default," said Andy Rominger of the Santa Fe Institute. So why does not this data appear in this case? Rominger and colleagues Miguel Fuentes (University of San Sebastian, Chile) and Pablo Market (Papal Catholic University of Chile) have adopted a new approach to resolving this issue. Instead of trying to describe only the fluctuations in biodiversity in all kinds of organisms, they also look at the fluctuations in the rocks or groups of organisms that share a generic pedigree genealogy. Reserved Evolutionary Dynamics. Between the different lines this dynamics may change, "says Romminger. That is, within the rocks, related organisms tend to find an effective adaptive strategy and never deviate too far. But among those rock-specific fitness peaks are the valleys of metaphorically uninhabitable space. "It turns out that just the reference to this simple idea, with some very simple mathematics, describes well models in fossil recordings."

These simple mathematics are tools that Fuentes used in 2009 to describe another system with unusual. fat distribution: the stock market. Using superstatic – a thermodynamic approach to describe the turbulent flow – Fuentes can accurately describe the predictable dramatic catastrophes and explosions in value.

"In biology, we see these catastrophes and explosions in terms of biodiversity," says Romminger. "We wondered if Fuentes' elegant approach could also describe the evolutionary dynamics we see in the fossils."

The team wrote that their success opens up new orientations of research to better understand the evolutionary processes that lead to a stable rate of extinction, and species formation at the levels of the order and the family of life, and interruptions that allow the emergence of new forms of life.
Well established theories of evolution patterns may be wrong


More Information:
"The imbalanced evolution of instability in emergence and disappearance explains the fluctuations of thick tails in the biodiversity of phanerosis" Scientific Achievements (2019). DOI: 10.1126 / sciadv.aat0122, https://advances.sciencemag.org/content/5/6/eaat0122

Provided by
Santa Fe Institute

References :
New norm: The study explains the universal model in fossil data (2019, June 26)
restored on 26 June 2019
from https://phys.org/news/2019-06-universal-pattern-fossil.html

This document is subject to copyright. Apart from any honest work for the purposes of private research or research, no
may be reproduced without written permission. Content is provided for information purposes only.


Source link