Permian lobed Zoophycos as the product of the terrestrialization process: Behavioral innovation in the Tahkandit Limestone (Yukon River, Alaska, USA)
Paleontological survey in the remote Yukon-Charley Rivers National Preserve in Alaska led to the discovery of lobed Zoophycos from the lower Tahkandit Limestone (informally named Sandstone unit), an interval characterized by grayish-green glauconitic sandstone and conglomerate of coastal origin. The...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://hdl.handle.net/11567/1160259 https://doi.org/10.1016/j.palaeo.2022.110931 |
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ftunivgenova:oai:iris.unige.it:11567/1160259 2024-04-14T08:20:51+00:00 Permian lobed Zoophycos as the product of the terrestrialization process: Behavioral innovation in the Tahkandit Limestone (Yukon River, Alaska, USA) Fiorillo A. R. Fanti F. Baucon A. Chiarenza A. A. Fiorillo, A. R. Fanti, F. Baucon, A. Chiarenza, A. A. 2022 ELETTRONICO https://hdl.handle.net/11567/1160259 https://doi.org/10.1016/j.palaeo.2022.110931 eng eng ELSEVIER place:RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS info:eu-repo/semantics/altIdentifier/wos/WOS:000806350000001 volume:593 firstpage:1 lastpage:13 numberofpages:13 journal:PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY https://hdl.handle.net/11567/1160259 doi:10.1016/j.palaeo.2022.110931 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85126369651 Ichnology Yukon-Charley Rivers National Preserve Marine Limestone info:eu-repo/semantics/article 2022 ftunivgenova https://doi.org/10.1016/j.palaeo.2022.110931 2024-03-21T02:20:40Z Paleontological survey in the remote Yukon-Charley Rivers National Preserve in Alaska led to the discovery of lobed Zoophycos from the lower Tahkandit Limestone (informally named Sandstone unit), an interval characterized by grayish-green glauconitic sandstone and conglomerate of coastal origin. The studied Zoophycos consists of a lobate skirt-like spreite bounded by a marginal tube. Smaller tongue-shaped lobes branch off from larger parent lobes that share the same tongue-like shape. Sedimentological features, together with body fossils and associated trace fossils (Planolites, Chondrites), indicate a shoreface habitat for the Zoophycos producer. This shallow-marine environmental setting is in contrast with the deeper bathymetries in which lobed Zoophycos are recovered in post-Palaeozoic times. The producer of the lobed Zoophycos of the Yukon River is interpreted as a deposit-feeder that used sensory-driven, directed search for locating heterogeneously distributed trophic resources. The Zoophycos producer filled its burrow with Coprolus-like fecal pellets, possibly complementing deposit feeding with microbial gardening and/or food caching. Data presented here provide useful insight into the morphological evolution and bathymetric distribution of Zoophycos, suggesting two 'Golden Ages' for lobed Zoophycos: (1) Carboniferous-Permian and (2) Cretaceous-Neogene. This stratigraphic distribution supports the important ecological role of major terrestrialization events, that are, the Palaeozoic expansion of land plants and the Mesozoic expansion of angiosperms. The consequent increased input of nutrients to coastal areas was an important contributor to declining trends in porewater oxygen concentrations. This phenomenon favored adaptive traits to exploit nutrient-rich but oxygen-poor niches, among which the U-shaped marginal tube of lobed Zoophycos was an efficient adaptation to bring oxygenated water into low-oxygen substrates. Article in Journal/Newspaper Yukon river Alaska Yukon Università degli Studi di Genova: CINECA IRIS Yukon Palaeogeography, Palaeoclimatology, Palaeoecology 593 110931 |
institution |
Open Polar |
collection |
Università degli Studi di Genova: CINECA IRIS |
op_collection_id |
ftunivgenova |
language |
English |
topic |
Ichnology Yukon-Charley Rivers National Preserve Marine Limestone |
spellingShingle |
Ichnology Yukon-Charley Rivers National Preserve Marine Limestone Fiorillo A. R. Fanti F. Baucon A. Chiarenza A. A. Permian lobed Zoophycos as the product of the terrestrialization process: Behavioral innovation in the Tahkandit Limestone (Yukon River, Alaska, USA) |
topic_facet |
Ichnology Yukon-Charley Rivers National Preserve Marine Limestone |
description |
Paleontological survey in the remote Yukon-Charley Rivers National Preserve in Alaska led to the discovery of lobed Zoophycos from the lower Tahkandit Limestone (informally named Sandstone unit), an interval characterized by grayish-green glauconitic sandstone and conglomerate of coastal origin. The studied Zoophycos consists of a lobate skirt-like spreite bounded by a marginal tube. Smaller tongue-shaped lobes branch off from larger parent lobes that share the same tongue-like shape. Sedimentological features, together with body fossils and associated trace fossils (Planolites, Chondrites), indicate a shoreface habitat for the Zoophycos producer. This shallow-marine environmental setting is in contrast with the deeper bathymetries in which lobed Zoophycos are recovered in post-Palaeozoic times. The producer of the lobed Zoophycos of the Yukon River is interpreted as a deposit-feeder that used sensory-driven, directed search for locating heterogeneously distributed trophic resources. The Zoophycos producer filled its burrow with Coprolus-like fecal pellets, possibly complementing deposit feeding with microbial gardening and/or food caching. Data presented here provide useful insight into the morphological evolution and bathymetric distribution of Zoophycos, suggesting two 'Golden Ages' for lobed Zoophycos: (1) Carboniferous-Permian and (2) Cretaceous-Neogene. This stratigraphic distribution supports the important ecological role of major terrestrialization events, that are, the Palaeozoic expansion of land plants and the Mesozoic expansion of angiosperms. The consequent increased input of nutrients to coastal areas was an important contributor to declining trends in porewater oxygen concentrations. This phenomenon favored adaptive traits to exploit nutrient-rich but oxygen-poor niches, among which the U-shaped marginal tube of lobed Zoophycos was an efficient adaptation to bring oxygenated water into low-oxygen substrates. |
author2 |
Fiorillo, A. R. Fanti, F. Baucon, A. Chiarenza, A. A. |
format |
Article in Journal/Newspaper |
author |
Fiorillo A. R. Fanti F. Baucon A. Chiarenza A. A. |
author_facet |
Fiorillo A. R. Fanti F. Baucon A. Chiarenza A. A. |
author_sort |
Fiorillo A. R. |
title |
Permian lobed Zoophycos as the product of the terrestrialization process: Behavioral innovation in the Tahkandit Limestone (Yukon River, Alaska, USA) |
title_short |
Permian lobed Zoophycos as the product of the terrestrialization process: Behavioral innovation in the Tahkandit Limestone (Yukon River, Alaska, USA) |
title_full |
Permian lobed Zoophycos as the product of the terrestrialization process: Behavioral innovation in the Tahkandit Limestone (Yukon River, Alaska, USA) |
title_fullStr |
Permian lobed Zoophycos as the product of the terrestrialization process: Behavioral innovation in the Tahkandit Limestone (Yukon River, Alaska, USA) |
title_full_unstemmed |
Permian lobed Zoophycos as the product of the terrestrialization process: Behavioral innovation in the Tahkandit Limestone (Yukon River, Alaska, USA) |
title_sort |
permian lobed zoophycos as the product of the terrestrialization process: behavioral innovation in the tahkandit limestone (yukon river, alaska, usa) |
publisher |
ELSEVIER |
publishDate |
2022 |
url |
https://hdl.handle.net/11567/1160259 https://doi.org/10.1016/j.palaeo.2022.110931 |
geographic |
Yukon |
geographic_facet |
Yukon |
genre |
Yukon river Alaska Yukon |
genre_facet |
Yukon river Alaska Yukon |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000806350000001 volume:593 firstpage:1 lastpage:13 numberofpages:13 journal:PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY https://hdl.handle.net/11567/1160259 doi:10.1016/j.palaeo.2022.110931 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85126369651 |
op_doi |
https://doi.org/10.1016/j.palaeo.2022.110931 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
593 |
container_start_page |
110931 |
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