Cargando…
Deciphering trophic interactions in a mid-Cambrian assemblage
Exceptionally preserved fossil sites have allowed specimen-based identification of trophic interactions to which network analyses have been applied. However, network analyses of the fossil record suffer from incomplete and indirect data, time averaging that obscures species coexistence, and biases i...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2021
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8010449/ https://www.ncbi.nlm.nih.gov/pubmed/33817576 http://dx.doi.org/10.1016/j.isci.2021.102271 |
_version_ | 1783673067304648704 |
---|---|
author | Swain, Anshuman Devereux, Matthew Fagan, William F. |
author_facet | Swain, Anshuman Devereux, Matthew Fagan, William F. |
author_sort | Swain, Anshuman |
collection | PubMed |
description | Exceptionally preserved fossil sites have allowed specimen-based identification of trophic interactions to which network analyses have been applied. However, network analyses of the fossil record suffer from incomplete and indirect data, time averaging that obscures species coexistence, and biases in preservation. Here, we present a high-resolution fossil data set from Raymond Quarry member of the mid-Cambrian Burgess Shale (7,549 specimens, 61 taxa, ∼510 Mya) and formulate a measure of “preservation bias” that aids identification of assemblage subsets to which network analyses can be reliably applied. For these sections, abundance correlation network analyses predicted longitudinally consistent trophic and competitive interactions. Our analyses predicted previously postulated trophic interactions with 83.5% accuracy and demonstrated a shift from specialist interaction-dominated assemblages to ones dominated by generalist and competitive interactions. This approach provides a robust, taphonomically corrected framework to explore and predict in detail the existence and ecological character of putative interactions in fossil data sets. |
format | Online Article Text |
id | pubmed-8010449 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-80104492021-04-02 Deciphering trophic interactions in a mid-Cambrian assemblage Swain, Anshuman Devereux, Matthew Fagan, William F. iScience Article Exceptionally preserved fossil sites have allowed specimen-based identification of trophic interactions to which network analyses have been applied. However, network analyses of the fossil record suffer from incomplete and indirect data, time averaging that obscures species coexistence, and biases in preservation. Here, we present a high-resolution fossil data set from Raymond Quarry member of the mid-Cambrian Burgess Shale (7,549 specimens, 61 taxa, ∼510 Mya) and formulate a measure of “preservation bias” that aids identification of assemblage subsets to which network analyses can be reliably applied. For these sections, abundance correlation network analyses predicted longitudinally consistent trophic and competitive interactions. Our analyses predicted previously postulated trophic interactions with 83.5% accuracy and demonstrated a shift from specialist interaction-dominated assemblages to ones dominated by generalist and competitive interactions. This approach provides a robust, taphonomically corrected framework to explore and predict in detail the existence and ecological character of putative interactions in fossil data sets. Elsevier 2021-03-04 /pmc/articles/PMC8010449/ /pubmed/33817576 http://dx.doi.org/10.1016/j.isci.2021.102271 Text en © 2021 The Author(s) http://creativecommons.org/licenses/by/4.0/ This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Swain, Anshuman Devereux, Matthew Fagan, William F. Deciphering trophic interactions in a mid-Cambrian assemblage |
title | Deciphering trophic interactions in a mid-Cambrian assemblage |
title_full | Deciphering trophic interactions in a mid-Cambrian assemblage |
title_fullStr | Deciphering trophic interactions in a mid-Cambrian assemblage |
title_full_unstemmed | Deciphering trophic interactions in a mid-Cambrian assemblage |
title_short | Deciphering trophic interactions in a mid-Cambrian assemblage |
title_sort | deciphering trophic interactions in a mid-cambrian assemblage |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8010449/ https://www.ncbi.nlm.nih.gov/pubmed/33817576 http://dx.doi.org/10.1016/j.isci.2021.102271 |
work_keys_str_mv | AT swainanshuman decipheringtrophicinteractionsinamidcambrianassemblage AT devereuxmatthew decipheringtrophicinteractionsinamidcambrianassemblage AT faganwilliamf decipheringtrophicinteractionsinamidcambrianassemblage |