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Ecological continuity and transformation after the Permo-Triassic mass extinction in northeastern Panthalassa.
Biol Lett. 2019 03 29; 15(3):20180902.BL

Abstract

The Permo-Triassic mass extinction (PTME) is often implicated in the transition from the Paleozoic evolutionary fauna (PEF) to the modern evolutionary fauna (MEF). However, the exact timing and details of this progression are unknown, especially regarding the vacating and filling of functional ecological space after the PTME. Here, we quantify the functional diversity of middle Permian and Early Triassic marine paleocommunities in the western US to determine functional re-organization in the aftermath of the PTME. Results indicate that while the PTME was selective in nature, many new Triassic taxa either re-filled functional roles of extinct Permian taxa or performed the same functional roles as Permian survivors. Despite this functional overlap, Permian survivors and new Triassic taxa differed significantly in their relative abundances within those overlapping functions. This shift in numerical emphasis, driven by an increase in abundance towards more MEF-style traits, may represent a first step in the transition between the PEF and MEF. We therefore suggest that the extreme impact of the PTME had significant and permanent re-organizational effects on the intrinsic structure of marine ecosystems. Early Triassic ecosystems likely bridged the gap between the Paleozoic and modern evolutionary faunas, as newly originated Triassic taxa shared ecospace with Permian survivors, but shifted functional emphasis.

Authors+Show Affiliations

1 California Academy of Sciences, Institute for Biodiversity Science and Sustainability , 55 Music Concourse Drive, San Francisco, CA 94118 , USA.1 California Academy of Sciences, Institute for Biodiversity Science and Sustainability , 55 Music Concourse Drive, San Francisco, CA 94118 , USA.2 Department of Geosciences, University of Wisconsin-Milwaukee , 3209 North Maryland Avenue, Milwaukee, WI 53211 , USA.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

30862310

Citation

Dineen, Ashley A., et al. "Ecological Continuity and Transformation After the Permo-Triassic Mass Extinction in Northeastern Panthalassa." Biology Letters, vol. 15, no. 3, 2019, p. 20180902.
Dineen AA, Roopnarine PD, Fraiser ML. Ecological continuity and transformation after the Permo-Triassic mass extinction in northeastern Panthalassa. Biol Lett. 2019;15(3):20180902.
Dineen, A. A., Roopnarine, P. D., & Fraiser, M. L. (2019). Ecological continuity and transformation after the Permo-Triassic mass extinction in northeastern Panthalassa. Biology Letters, 15(3), 20180902. https://doi.org/10.1098/rsbl.2018.0902
Dineen AA, Roopnarine PD, Fraiser ML. Ecological Continuity and Transformation After the Permo-Triassic Mass Extinction in Northeastern Panthalassa. Biol Lett. 2019 03 29;15(3):20180902. PubMed PMID: 30862310.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ecological continuity and transformation after the Permo-Triassic mass extinction in northeastern Panthalassa. AU - Dineen,Ashley A, AU - Roopnarine,Peter D, AU - Fraiser,Margaret L, PY - 2020/03/01/pmc-release PY - 2019/3/14/entrez PY - 2019/3/14/pubmed PY - 2019/3/14/medline KW - Permo-Triassic KW - biodiversity KW - ecospace KW - functional diversity KW - mass extinction KW - paleoecology SP - 20180902 EP - 20180902 JF - Biology letters JO - Biol. Lett. VL - 15 IS - 3 N2 - The Permo-Triassic mass extinction (PTME) is often implicated in the transition from the Paleozoic evolutionary fauna (PEF) to the modern evolutionary fauna (MEF). However, the exact timing and details of this progression are unknown, especially regarding the vacating and filling of functional ecological space after the PTME. Here, we quantify the functional diversity of middle Permian and Early Triassic marine paleocommunities in the western US to determine functional re-organization in the aftermath of the PTME. Results indicate that while the PTME was selective in nature, many new Triassic taxa either re-filled functional roles of extinct Permian taxa or performed the same functional roles as Permian survivors. Despite this functional overlap, Permian survivors and new Triassic taxa differed significantly in their relative abundances within those overlapping functions. This shift in numerical emphasis, driven by an increase in abundance towards more MEF-style traits, may represent a first step in the transition between the PEF and MEF. We therefore suggest that the extreme impact of the PTME had significant and permanent re-organizational effects on the intrinsic structure of marine ecosystems. Early Triassic ecosystems likely bridged the gap between the Paleozoic and modern evolutionary faunas, as newly originated Triassic taxa shared ecospace with Permian survivors, but shifted functional emphasis. SN - 1744-957X UR - https://www.unboundmedicine.com/medline/citation/30862310/Ecological_continuity_and_transformation_after_the_Permo_Triassic_mass_extinction_in_northeastern_Panthalassa_ L2 - https://royalsocietypublishing.org/doi/full/10.1098/rsbl.2018.0902?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -