Aulacoseira giraffensis (Bacillariophyceae), a new diatom species forming massive populations in an Eocene lake
Background and aims – Diatoms began to inhabit freshwater by at least the Late Cretaceous, becoming well established by the early to middle Eocene. Aulacoseira , an important diatom in numerous ponds, lakes and rivers today, was one of the earliest known genera to colonize freshwater ecosystems. Mem...
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Meise Botanic Garden and Royal Botanical Society of Belgium
2019
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ftzenodo:oai:zenodo.org:10412477 2024-09-09T19:24:39+00:00 Aulacoseira giraffensis (Bacillariophyceae), a new diatom species forming massive populations in an Eocene lake Siver, Peter Wolfe, Alexander Edlund, Mark Sibley, Joel Hausman, Josh Torres, Paula Lott, Anne Marie 2019-07-09 https://doi.org/10.5091/plecevo.2019.1586 unknown Meise Botanic Garden and Royal Botanical Society of Belgium https://doi.org/10.1016/S0035-1598(03)00011-4 https://doi.org/10.1007/978-94-017-9597-5_4 https://doi.org/10.1130/0091-7613(2002)030 https://doi.org/10.1017/S2475263000001434 https://doi.org/10.1016/j.lithos.2004.03.047 https://doi.org/10.1098/rstb.1992.0056 https://doi.org/10.4319/lo.2008.53.3.1125 https://doi.org/10.1080/0269249X.2010.9705853 https://doi.org/10.1130/0016-7606(1987)99 https://doi.org/10.3133/pp593E https://doi.org/10.2113/gsmicropal.52.6.545 https://doi.org/10.1127/nova_hedwigia/2015/0270 https://doi.org/10.1086/428702 https://doi.org/10.2110/palo.2007-p07-077r https://doi.org/10.5091/plecevo.2010.419 https://doi.org/10.3732/ajb.1500004 https://doi.org/10.1080/0269249X.2016.1256351 https://doi.org/10.2110/palo.2018.045 https://doi.org/10.1139/e04-051 https://doi.org/10.2110/palo.2005.p05-14e https://doi.org/10.1130/G39002.1 https://zenodo.org/communities/biosyslit https://doi.org/10.5091/plecevo.2019.1586 oai:zenodo.org:10412477 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Plant Ecology and Evolution, 152((2)), 358-367, (2019-07-09) Aulacoseira blooms Cretaceous Eocene freshwater fossil diatoms info:eu-repo/semantics/article 2019 ftzenodo https://doi.org/10.5091/plecevo.2019.158610.1016/S0035-1598(03)00011-410.1007/978-94-017-9597-5_410.1130/0091-7613(2002)03010.1017/S247526300000143410.1016/j.lithos.2004.03.04710.1098/rstb.1992.005610.4319/lo.2008.53.3.112510.1080/0269249X.2010.970585310. 2024-07-25T16:49:00Z Background and aims – Diatoms began to inhabit freshwater by at least the Late Cretaceous, becoming well established by the early to middle Eocene. Aulacoseira , an important diatom in numerous ponds, lakes and rivers today, was one of the earliest known genera to colonize freshwater ecosystems. Members of this genus with characteristics familiar to those found on modern species became increasingly more abundant by the Eocene, and continued to thrive throughout the Miocene to the present. We describe a new species of Aulacoseira from an early to middle Eocene site near the Arctic Circle in northern Canada. Methods – Twelve samples taken from the Giraffe Pipe core were analysed in this study. Light and scanning electron microscopy were used to document morphological characters. Morphometric measurements were made from 200 specimens per sample (n = 1200), and used to investigate changes in valve size over time. Key results – The new species, Aulacoseira giraffensis , has valves with a length:width ratio close to 1, a hyaline valve face, straight mantle striae, a shallow ringleiste, branched linking spines, concave-convex complementarity on adjacent valve faces, and rimoportulae with simple papillae-like structure. The suite of characters, especially the highly branched spines, concave-convex valves and simple rimoportulae, is unique for this species. Large numbers of A. giraffensis specimens were found over a ten-metre section of the core, representing thousands of years. These high concentrations are indicative of abundant, bloom-like, growth. Conclusions – The locality represents one of the earliest known records of Aulacoseira dominating a freshwater community. Findings confirm that the morphological body plan for the genus was well established by the Eocene. Although findings indicate evolutionary stasis in morphological structure for A. giraffensis over a time scale of thousands of years, oscillations in valve morphometrics could potentially be used to trace changes in the environment of this ancient Arctic ... Article in Journal/Newspaper Arctic Zenodo Arctic Canada Journal of Hydrology 561 751 763 |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Aulacoseira blooms Cretaceous Eocene freshwater fossil diatoms |
spellingShingle |
Aulacoseira blooms Cretaceous Eocene freshwater fossil diatoms Siver, Peter Wolfe, Alexander Edlund, Mark Sibley, Joel Hausman, Josh Torres, Paula Lott, Anne Marie Aulacoseira giraffensis (Bacillariophyceae), a new diatom species forming massive populations in an Eocene lake |
topic_facet |
Aulacoseira blooms Cretaceous Eocene freshwater fossil diatoms |
description |
Background and aims – Diatoms began to inhabit freshwater by at least the Late Cretaceous, becoming well established by the early to middle Eocene. Aulacoseira , an important diatom in numerous ponds, lakes and rivers today, was one of the earliest known genera to colonize freshwater ecosystems. Members of this genus with characteristics familiar to those found on modern species became increasingly more abundant by the Eocene, and continued to thrive throughout the Miocene to the present. We describe a new species of Aulacoseira from an early to middle Eocene site near the Arctic Circle in northern Canada. Methods – Twelve samples taken from the Giraffe Pipe core were analysed in this study. Light and scanning electron microscopy were used to document morphological characters. Morphometric measurements were made from 200 specimens per sample (n = 1200), and used to investigate changes in valve size over time. Key results – The new species, Aulacoseira giraffensis , has valves with a length:width ratio close to 1, a hyaline valve face, straight mantle striae, a shallow ringleiste, branched linking spines, concave-convex complementarity on adjacent valve faces, and rimoportulae with simple papillae-like structure. The suite of characters, especially the highly branched spines, concave-convex valves and simple rimoportulae, is unique for this species. Large numbers of A. giraffensis specimens were found over a ten-metre section of the core, representing thousands of years. These high concentrations are indicative of abundant, bloom-like, growth. Conclusions – The locality represents one of the earliest known records of Aulacoseira dominating a freshwater community. Findings confirm that the morphological body plan for the genus was well established by the Eocene. Although findings indicate evolutionary stasis in morphological structure for A. giraffensis over a time scale of thousands of years, oscillations in valve morphometrics could potentially be used to trace changes in the environment of this ancient Arctic ... |
format |
Article in Journal/Newspaper |
author |
Siver, Peter Wolfe, Alexander Edlund, Mark Sibley, Joel Hausman, Josh Torres, Paula Lott, Anne Marie |
author_facet |
Siver, Peter Wolfe, Alexander Edlund, Mark Sibley, Joel Hausman, Josh Torres, Paula Lott, Anne Marie |
author_sort |
Siver, Peter |
title |
Aulacoseira giraffensis (Bacillariophyceae), a new diatom species forming massive populations in an Eocene lake |
title_short |
Aulacoseira giraffensis (Bacillariophyceae), a new diatom species forming massive populations in an Eocene lake |
title_full |
Aulacoseira giraffensis (Bacillariophyceae), a new diatom species forming massive populations in an Eocene lake |
title_fullStr |
Aulacoseira giraffensis (Bacillariophyceae), a new diatom species forming massive populations in an Eocene lake |
title_full_unstemmed |
Aulacoseira giraffensis (Bacillariophyceae), a new diatom species forming massive populations in an Eocene lake |
title_sort |
aulacoseira giraffensis (bacillariophyceae), a new diatom species forming massive populations in an eocene lake |
publisher |
Meise Botanic Garden and Royal Botanical Society of Belgium |
publishDate |
2019 |
url |
https://doi.org/10.5091/plecevo.2019.1586 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Plant Ecology and Evolution, 152((2)), 358-367, (2019-07-09) |
op_relation |
https://doi.org/10.1016/S0035-1598(03)00011-4 https://doi.org/10.1007/978-94-017-9597-5_4 https://doi.org/10.1130/0091-7613(2002)030 https://doi.org/10.1017/S2475263000001434 https://doi.org/10.1016/j.lithos.2004.03.047 https://doi.org/10.1098/rstb.1992.0056 https://doi.org/10.4319/lo.2008.53.3.1125 https://doi.org/10.1080/0269249X.2010.9705853 https://doi.org/10.1130/0016-7606(1987)99 https://doi.org/10.3133/pp593E https://doi.org/10.2113/gsmicropal.52.6.545 https://doi.org/10.1127/nova_hedwigia/2015/0270 https://doi.org/10.1086/428702 https://doi.org/10.2110/palo.2007-p07-077r https://doi.org/10.5091/plecevo.2010.419 https://doi.org/10.3732/ajb.1500004 https://doi.org/10.1080/0269249X.2016.1256351 https://doi.org/10.2110/palo.2018.045 https://doi.org/10.1139/e04-051 https://doi.org/10.2110/palo.2005.p05-14e https://doi.org/10.1130/G39002.1 https://zenodo.org/communities/biosyslit https://doi.org/10.5091/plecevo.2019.1586 oai:zenodo.org:10412477 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.5091/plecevo.2019.158610.1016/S0035-1598(03)00011-410.1007/978-94-017-9597-5_410.1130/0091-7613(2002)03010.1017/S247526300000143410.1016/j.lithos.2004.03.04710.1098/rstb.1992.005610.4319/lo.2008.53.3.112510.1080/0269249X.2010.970585310. |
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Journal of Hydrology |
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