Individual diet variability shapes the architecture of Antarctic benthic food webs
Antarctic biodiversity is affected by seasonal sea-ice dynamics driving basal resource availability. To (1) determine the role of intraspecific dietary variability in structuring benthic food webs sustaining Antarctic biodiversity, and (2) understand how food webs and the position of topologically c...
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ftunivromairis:oai:iris.uniroma1.it:11573/1710846 2024-09-09T19:10:07+00:00 Individual diet variability shapes the architecture of Antarctic benthic food webs Sporta Caputi, Simona Kabala, Jerzy Piotr Rossi, Loreto Careddu, Giulio Calizza, Edoardo Ventura, Matteo Costantini, Maria Letizia Sporta Caputi, Simona Kabala, Jerzy Piotr Rossi, Loreto Careddu, Giulio Calizza, Edoardo Ventura, Matteo Costantini, Maria Letizia 2024 https://hdl.handle.net/11573/1710846 https://doi.org/10.1038/s41598-024-62644-5 eng eng info:eu-repo/semantics/altIdentifier/pmid/38811641 info:eu-repo/semantics/altIdentifier/wos/WOS:001235693100052 volume:14 issue:1 numberofpages:16 journal:SCIENTIFIC REPORTS https://hdl.handle.net/11573/1710846 doi:10.1038/s41598-024-62644-5 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85194848892 info:eu-repo/semantics/openAccess biodiversity climate-change ecology community ecology conservation biology ecological modelling ecological network ecosystem ecology food web stable isotope analysis info:eu-repo/semantics/article 2024 ftunivromairis https://doi.org/10.1038/s41598-024-62644-5 2024-07-01T23:39:29Z Antarctic biodiversity is affected by seasonal sea-ice dynamics driving basal resource availability. To (1) determine the role of intraspecific dietary variability in structuring benthic food webs sustaining Antarctic biodiversity, and (2) understand how food webs and the position of topologically central species vary with sea-ice cover, single benthic individuals’ diets were studied by isotopic analysis before sea-ice breakup and afterwards. Isotopic trophospecies (or Isotopic Trophic Units) were investigated and food webs reconstructed using Bayesian Mixing Models. As nodes, these webs used either ITUs regardless of their taxonomic membership (ITU-webs) or ITUs assigned to species (population-webs). Both were compared to taxonomic-webs based on taxa and their mean isotopic values. Higher resource availability after sea-ice breakup led to simpler community structure, with lower connectance and linkage density. Intra-population diet variability and compartmentalisation were crucial in determining community structure, showing population-webs to be more complex, stable and robust to biodiversity loss than taxonomic-webs. The core web, representing the minimal community ‘skeleton’ that expands opportunistically while maintaining web stability with changing resource availability, was also identified. Central nodes included the sea-urchin Sterechinus neumayeri and the bivalve Adamussium colbecki, whose diet is described in unprecedented detail. The core web, compartmentalisation and topologically central nodes represent crucial factors underlying Antarctica’s rich benthic food web persistence. Article in Journal/Newspaper Antarc* Antarctic Sea ice Sapienza Università di Roma: CINECA IRIS Antarctic Scientific Reports 14 1 |
institution |
Open Polar |
collection |
Sapienza Università di Roma: CINECA IRIS |
op_collection_id |
ftunivromairis |
language |
English |
topic |
biodiversity climate-change ecology community ecology conservation biology ecological modelling ecological network ecosystem ecology food web stable isotope analysis |
spellingShingle |
biodiversity climate-change ecology community ecology conservation biology ecological modelling ecological network ecosystem ecology food web stable isotope analysis Sporta Caputi, Simona Kabala, Jerzy Piotr Rossi, Loreto Careddu, Giulio Calizza, Edoardo Ventura, Matteo Costantini, Maria Letizia Individual diet variability shapes the architecture of Antarctic benthic food webs |
topic_facet |
biodiversity climate-change ecology community ecology conservation biology ecological modelling ecological network ecosystem ecology food web stable isotope analysis |
description |
Antarctic biodiversity is affected by seasonal sea-ice dynamics driving basal resource availability. To (1) determine the role of intraspecific dietary variability in structuring benthic food webs sustaining Antarctic biodiversity, and (2) understand how food webs and the position of topologically central species vary with sea-ice cover, single benthic individuals’ diets were studied by isotopic analysis before sea-ice breakup and afterwards. Isotopic trophospecies (or Isotopic Trophic Units) were investigated and food webs reconstructed using Bayesian Mixing Models. As nodes, these webs used either ITUs regardless of their taxonomic membership (ITU-webs) or ITUs assigned to species (population-webs). Both were compared to taxonomic-webs based on taxa and their mean isotopic values. Higher resource availability after sea-ice breakup led to simpler community structure, with lower connectance and linkage density. Intra-population diet variability and compartmentalisation were crucial in determining community structure, showing population-webs to be more complex, stable and robust to biodiversity loss than taxonomic-webs. The core web, representing the minimal community ‘skeleton’ that expands opportunistically while maintaining web stability with changing resource availability, was also identified. Central nodes included the sea-urchin Sterechinus neumayeri and the bivalve Adamussium colbecki, whose diet is described in unprecedented detail. The core web, compartmentalisation and topologically central nodes represent crucial factors underlying Antarctica’s rich benthic food web persistence. |
author2 |
Sporta Caputi, Simona Kabala, Jerzy Piotr Rossi, Loreto Careddu, Giulio Calizza, Edoardo Ventura, Matteo Costantini, Maria Letizia |
format |
Article in Journal/Newspaper |
author |
Sporta Caputi, Simona Kabala, Jerzy Piotr Rossi, Loreto Careddu, Giulio Calizza, Edoardo Ventura, Matteo Costantini, Maria Letizia |
author_facet |
Sporta Caputi, Simona Kabala, Jerzy Piotr Rossi, Loreto Careddu, Giulio Calizza, Edoardo Ventura, Matteo Costantini, Maria Letizia |
author_sort |
Sporta Caputi, Simona |
title |
Individual diet variability shapes the architecture of Antarctic benthic food webs |
title_short |
Individual diet variability shapes the architecture of Antarctic benthic food webs |
title_full |
Individual diet variability shapes the architecture of Antarctic benthic food webs |
title_fullStr |
Individual diet variability shapes the architecture of Antarctic benthic food webs |
title_full_unstemmed |
Individual diet variability shapes the architecture of Antarctic benthic food webs |
title_sort |
individual diet variability shapes the architecture of antarctic benthic food webs |
publishDate |
2024 |
url |
https://hdl.handle.net/11573/1710846 https://doi.org/10.1038/s41598-024-62644-5 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Sea ice |
genre_facet |
Antarc* Antarctic Sea ice |
op_relation |
info:eu-repo/semantics/altIdentifier/pmid/38811641 info:eu-repo/semantics/altIdentifier/wos/WOS:001235693100052 volume:14 issue:1 numberofpages:16 journal:SCIENTIFIC REPORTS https://hdl.handle.net/11573/1710846 doi:10.1038/s41598-024-62644-5 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85194848892 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41598-024-62644-5 |
container_title |
Scientific Reports |
container_volume |
14 |
container_issue |
1 |
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1809824606108778496 |