The evolutionary dynamics of the early Palaeozoic marine biodiversity accumulation

Show full item record



Permalink

http://hdl.handle.net/10138/305515

Citation

Kröger , B , Franeck , F & Rasmussen , C M Ø 2019 , ' The evolutionary dynamics of the early Palaeozoic marine biodiversity accumulation ' , Proceedings of the Royal Society B. Biological Sciences , vol. 286 , no. 1909 , 20191634 . https://doi.org/10.1098/rspb.2019.1634

Title: The evolutionary dynamics of the early Palaeozoic marine biodiversity accumulation
Author: Kröger, Björn; Franeck, Franziska; Rasmussen, Christian M. Ø.
Contributor: University of Helsinki, Staff Services
Date: 2019-08-21
Language: eng
Number of pages: 6
Belongs to series: Proceedings of the Royal Society B. Biological Sciences
ISSN: 0962-8452
URI: http://hdl.handle.net/10138/305515
Abstract: The early Palaeozoic Era records the initial biodiversification of the Phanerozoic. The increase in biodiversity involved drastic changes in taxon longevity, and in rates of origination and extinction. Here, we calculate these variables in unprecedented temporal resolution. We find that highly volatile origination and extinction rates are associated with short genus longevities during the Cambrian Period. During the Ordovician and Silurian periods, evolutionary rates were less volatile and genera persisted for increasingly longer intervals. The 90%-genus life expectancy doubled from 5 Myr in the late Cambrian to more than 10 Myr in the Ordovician-Silurian periods. Intervals with widespread ecosystem disruption are associated with short genus longevities during the Cambrian and with exceptionally high longevities during the Ordovician and Silurian periods. The post-Cambrian increase in persistence of genera, therefore, indicates an elevated ability of the changing early Palaeozoic marine ecosystems to sustainably maintain existing genera. This is evidence of a new level of ecosystem resilience which evolved during the Ordovician Period.
Subject: CAPTURE-MARK-RECAPTURE
EXTINCTION
ORDOVICIAN BIODIVERSIFICATION
ORIGINATION
OXYGEN
RATES
REEFS
SPECIATION
TAXONOMIC DIVERSITY
capture-recapture modelling
extinction rates
origination rates
resilience
survivorship
taxon longevity
1181 Ecology, evolutionary biology
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
rspb.2019.1634.pdf 465.3Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record