Antarctica as an evolutionary incubator? Phylogenetic comparative study of the amphipod family Iphimediidae on the Antarctic shelf
editorial reviewed From about 40 Mya, while Antarctica geographically isolated from the rest of the world, the marine shelf fauna faced a dramatic decrease in water temperatures. Many lineages went extinct, while others adapted and flourished. The Antarctic clade of the amphipod family Iphimediidae...
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ftorbi:oai:orbi.ulg.ac.be:2268/295186 2024-04-21T07:49:06+00:00 Antarctica as an evolutionary incubator? Phylogenetic comparative study of the amphipod family Iphimediidae on the Antarctic shelf Verheye, Marie Herrel, Anthony Lepoint, Gilles Martinez Soares, Pablo Schön, Isa Frederich, Bruno 2022-09 https://orbi.uliege.be/handle/2268/295186 en eng https://orbi.uliege.be/handle/2268/295186 info:hdl:2268/295186 restricted access http://purl.org/coar/access_right/c_16ec info:eu-repo/semantics/restrictedAccess Zoology 2022, Courtrai, Belgium [BE], 22 septembre - 23 septembre 2022 Amphipods Geometric morphometrics Stable isotopes Antarctica Diversification Adaptive radiation Phylogenetic comparative methods Life sciences Zoology Environmental sciences & ecology Aquatic sciences & oceanology Sciences du vivant Zoologie Sciences de l’environnement & écologie Sciences aquatiques & océanologie conference paper not in proceedings http://purl.org/coar/resource_type/c_18cp info:eu-repo/semantics/conferencePaper editorial reviewed 2022 ftorbi 2024-03-27T14:56:48Z editorial reviewed From about 40 Mya, while Antarctica geographically isolated from the rest of the world, the marine shelf fauna faced a dramatic decrease in water temperatures. Many lineages went extinct, while others adapted and flourished. The Antarctic clade of the amphipod family Iphimediidae was among the successful ones. Here, a range of cutting-edge phylogenetic comparative and morphometric methods are used to investigate the evolutionary processes which generated the exceptional diversity of this clade. To this purpose, a novel multigene phylogeny of the family was first reconstructed. Secondly, 3D shape data were obtained by applying 3D-geometric morphometric methods on micro- CT scans of the specimens. As a prerequisite to the study of species diversification, species boundaries were first investigated using a combination of DNA-based delimitation methods and morphological data. The latter showed that species diversity in Antarctic iphimediids is greatly underestimated, as most of the described species appear to be complexes of multiple morphologically similar species. Potential changes in the rate of lineage diversification were explored in parallel to the evolution of morphological traits (mouthparts 3D shape data) along the phylogeny. On one hand, we found no evidence of an early burst of lineage diversification. On the other hand, late bursts (appr. 7-3 Mya) of lineage diversification were detected in two subclades. Such late radiations could result from the invasion of novel ecological niches, as a late partitioning of mouthparts’ shape diversity along the phylogeny is also observed. Plio-Pleistocene glacial cycles, which have been hypothesized to act as diversity pumps, might also have promoted late diversification events in Antarctic iphimediids. By applying such an integrative approach for the first time on Antarctic invertebrates, this study improves our general understanding of the evolutionary dynamics shaping the standing Antarctic shelf biodiversity. Conference Object Antarc* Antarctic Antarctica University of Liège: ORBi (Open Repository and Bibliography) |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Amphipods Geometric morphometrics Stable isotopes Antarctica Diversification Adaptive radiation Phylogenetic comparative methods Life sciences Zoology Environmental sciences & ecology Aquatic sciences & oceanology Sciences du vivant Zoologie Sciences de l’environnement & écologie Sciences aquatiques & océanologie |
spellingShingle |
Amphipods Geometric morphometrics Stable isotopes Antarctica Diversification Adaptive radiation Phylogenetic comparative methods Life sciences Zoology Environmental sciences & ecology Aquatic sciences & oceanology Sciences du vivant Zoologie Sciences de l’environnement & écologie Sciences aquatiques & océanologie Verheye, Marie Herrel, Anthony Lepoint, Gilles Martinez Soares, Pablo Schön, Isa Frederich, Bruno Antarctica as an evolutionary incubator? Phylogenetic comparative study of the amphipod family Iphimediidae on the Antarctic shelf |
topic_facet |
Amphipods Geometric morphometrics Stable isotopes Antarctica Diversification Adaptive radiation Phylogenetic comparative methods Life sciences Zoology Environmental sciences & ecology Aquatic sciences & oceanology Sciences du vivant Zoologie Sciences de l’environnement & écologie Sciences aquatiques & océanologie |
description |
editorial reviewed From about 40 Mya, while Antarctica geographically isolated from the rest of the world, the marine shelf fauna faced a dramatic decrease in water temperatures. Many lineages went extinct, while others adapted and flourished. The Antarctic clade of the amphipod family Iphimediidae was among the successful ones. Here, a range of cutting-edge phylogenetic comparative and morphometric methods are used to investigate the evolutionary processes which generated the exceptional diversity of this clade. To this purpose, a novel multigene phylogeny of the family was first reconstructed. Secondly, 3D shape data were obtained by applying 3D-geometric morphometric methods on micro- CT scans of the specimens. As a prerequisite to the study of species diversification, species boundaries were first investigated using a combination of DNA-based delimitation methods and morphological data. The latter showed that species diversity in Antarctic iphimediids is greatly underestimated, as most of the described species appear to be complexes of multiple morphologically similar species. Potential changes in the rate of lineage diversification were explored in parallel to the evolution of morphological traits (mouthparts 3D shape data) along the phylogeny. On one hand, we found no evidence of an early burst of lineage diversification. On the other hand, late bursts (appr. 7-3 Mya) of lineage diversification were detected in two subclades. Such late radiations could result from the invasion of novel ecological niches, as a late partitioning of mouthparts’ shape diversity along the phylogeny is also observed. Plio-Pleistocene glacial cycles, which have been hypothesized to act as diversity pumps, might also have promoted late diversification events in Antarctic iphimediids. By applying such an integrative approach for the first time on Antarctic invertebrates, this study improves our general understanding of the evolutionary dynamics shaping the standing Antarctic shelf biodiversity. |
format |
Conference Object |
author |
Verheye, Marie Herrel, Anthony Lepoint, Gilles Martinez Soares, Pablo Schön, Isa Frederich, Bruno |
author_facet |
Verheye, Marie Herrel, Anthony Lepoint, Gilles Martinez Soares, Pablo Schön, Isa Frederich, Bruno |
author_sort |
Verheye, Marie |
title |
Antarctica as an evolutionary incubator? Phylogenetic comparative study of the amphipod family Iphimediidae on the Antarctic shelf |
title_short |
Antarctica as an evolutionary incubator? Phylogenetic comparative study of the amphipod family Iphimediidae on the Antarctic shelf |
title_full |
Antarctica as an evolutionary incubator? Phylogenetic comparative study of the amphipod family Iphimediidae on the Antarctic shelf |
title_fullStr |
Antarctica as an evolutionary incubator? Phylogenetic comparative study of the amphipod family Iphimediidae on the Antarctic shelf |
title_full_unstemmed |
Antarctica as an evolutionary incubator? Phylogenetic comparative study of the amphipod family Iphimediidae on the Antarctic shelf |
title_sort |
antarctica as an evolutionary incubator? phylogenetic comparative study of the amphipod family iphimediidae on the antarctic shelf |
publishDate |
2022 |
url |
https://orbi.uliege.be/handle/2268/295186 |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Zoology 2022, Courtrai, Belgium [BE], 22 septembre - 23 septembre 2022 |
op_relation |
https://orbi.uliege.be/handle/2268/295186 info:hdl:2268/295186 |
op_rights |
restricted access http://purl.org/coar/access_right/c_16ec info:eu-repo/semantics/restrictedAccess |
_version_ |
1796953196945473536 |