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Trophic network models explain instability of Early Triassic terrestrial communities.
Proc Biol Sci. 2007 Sep 07; 274(1622):2077-86.PB

Abstract

Studies of the end-Permian mass extinction have emphasized potential abiotic causes and their direct biotic effects. Less attention has been devoted to secondary extinctions resulting from ecological crises and the effect of community structure on such extinctions. Here we use a trophic network model that combines topological and dynamic approaches to simulate disruptions of primary productivity in palaeocommunities. We apply the model to Permian and Triassic communities of the Karoo Basin, South Africa, and show that while Permian communities bear no evidence of being especially susceptible to extinction, Early Triassic communities appear to have been inherently less stable. Much of the instability results from the faster post-extinction diversification of amphibian guilds relative to amniotes. The resulting communities differed fundamentally in structure from their Permian predecessors. Additionally, our results imply that changing community structures over time may explain long-term trends like declining rates of Phanerozoic background extinction.

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Authors+Show Affiliations

Roopnarine PD
Department of Invertebrate Zoology and Geology, California Academy of Sciences, 875 Howard Street, San Francisco, CA 94103, USA. proopnarine@calacademy.org
Angielczyk KD
No affiliation info available
Wang SC
No affiliation info available
Hertog R
No affiliation info available

MeSH

AnimalsBiodiversityEcosystemExtinction, BiologicalFood ChainFossilsModels, BiologicalPaleontology

Pub Type(s)

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

Language

eng

PubMed ID

17609191

Citation

Roopnarine, Peter D., et al. "Trophic Network Models Explain Instability of Early Triassic Terrestrial Communities." Proceedings. Biological Sciences, vol. 274, no. 1622, 2007, pp. 2077-86.
Roopnarine PD, Angielczyk KD, Wang SC, et al. Trophic network models explain instability of Early Triassic terrestrial communities. Proc Biol Sci. 2007;274(1622):2077-86.
Roopnarine, P. D., Angielczyk, K. D., Wang, S. C., & Hertog, R. (2007). Trophic network models explain instability of Early Triassic terrestrial communities. Proceedings. Biological Sciences, 274(1622), 2077-86.
Roopnarine PD, et al. Trophic Network Models Explain Instability of Early Triassic Terrestrial Communities. Proc Biol Sci. 2007 Sep 7;274(1622):2077-86. PubMed PMID: 17609191.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Trophic network models explain instability of Early Triassic terrestrial communities. AU - Roopnarine,Peter D, AU - Angielczyk,Kenneth D, AU - Wang,Steve C, AU - Hertog,Rachel, PY - 2007/7/5/pubmed PY - 2007/10/24/medline PY - 2007/7/5/entrez SP - 2077 EP - 86 JF - Proceedings. Biological sciences JO - Proc Biol Sci VL - 274 IS - 1622 N2 - Studies of the end-Permian mass extinction have emphasized potential abiotic causes and their direct biotic effects. Less attention has been devoted to secondary extinctions resulting from ecological crises and the effect of community structure on such extinctions. Here we use a trophic network model that combines topological and dynamic approaches to simulate disruptions of primary productivity in palaeocommunities. We apply the model to Permian and Triassic communities of the Karoo Basin, South Africa, and show that while Permian communities bear no evidence of being especially susceptible to extinction, Early Triassic communities appear to have been inherently less stable. Much of the instability results from the faster post-extinction diversification of amphibian guilds relative to amniotes. The resulting communities differed fundamentally in structure from their Permian predecessors. Additionally, our results imply that changing community structures over time may explain long-term trends like declining rates of Phanerozoic background extinction. SN - 0962-8452 UR - https://www.unboundmedicine.com/medline/citation/17609191/Trophic_network_models_explain_instability_of_Early_Triassic_terrestrial_communities_ L2 - https://royalsocietypublishing.org/doi/10.1098/rspb.2007.0515?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -