Canopy Flow Analysis Reveals the Advantage of Size in the Oldest Communities of Multicellular Eukaryotes
At Mistaken Point, Newfoundland, Canada, rangeomorph “fronds” dominate the earliest (579–565 million years ago) fossil communities of large (0.1 to 2 m height) multicellular benthic eukaryotes. They lived in low-flow environments, fueled by uptake [1–3] of dissolved reactants (osmotrophy). However,...
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ftpubmed:oai:pubmedcentral.nih.gov:4428146 2023-05-15T17:22:31+02:00 Canopy Flow Analysis Reveals the Advantage of Size in the Oldest Communities of Multicellular Eukaryotes Ghisalberti, Marco Gold, David A. Laflamme, Marc Clapham, Matthew E. Narbonne, Guy M. Summons, Roger E. Johnston, David T. Jacobs, David K. 2014-01-23 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4428146/ http://www.ncbi.nlm.nih.gov/pubmed/24462003 https://doi.org/10.1016/j.cub.2013.12.017 en eng http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4428146/ http://www.ncbi.nlm.nih.gov/pubmed/24462003 http://dx.doi.org/10.1016/j.cub.2013.12.017 © 2014 Elsevier Ltd All rights reserved Article Text 2014 ftpubmed https://doi.org/10.1016/j.cub.2013.12.017 2015-05-17T00:12:26Z At Mistaken Point, Newfoundland, Canada, rangeomorph “fronds” dominate the earliest (579–565 million years ago) fossil communities of large (0.1 to 2 m height) multicellular benthic eukaryotes. They lived in low-flow environments, fueled by uptake [1–3] of dissolved reactants (osmotrophy). However, prokaryotes are effective osmotrophs, and the advantage of taller eukaryotic osmotrophs in this deepwater community context has not been addressed. We reconstructed flow-velocity profiles and vertical mixing using canopy flow models appropriate to the densities of the observed communities. Further modeling of processes at organismal surfaces documents increasing uptake with height in the community as a function of thinning of the diffusive boundary layer with increased velocity. The velocity profile, produced by canopy flow in the community, generates this advantage of upward growth. Alternative models of upward growth advantage based on redox/resource gradients fail, given the efficiency of vertical mixing. In benthic communities of osmotrophs of sufficient density, access to flow in low-flow settings provides an advantage to taller architecture, providing a selectional driver for communities of tall eukaryotes in contexts where phototropism cannot contribute to upward growth. These Ediacaran deep-sea fossils were preserved during the increasing oxygenation prior to the Cambrian radiation of animals and likely represent an important phase in the ecological and evolutionary transition to more complex eukaryotic forms. Text Newfoundland PubMed Central (PMC) Canada Mistaken Point ENVELOPE(-55.774,-55.774,53.478,53.478) Current Biology 24 3 305 309 |
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Article Ghisalberti, Marco Gold, David A. Laflamme, Marc Clapham, Matthew E. Narbonne, Guy M. Summons, Roger E. Johnston, David T. Jacobs, David K. Canopy Flow Analysis Reveals the Advantage of Size in the Oldest Communities of Multicellular Eukaryotes |
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description |
At Mistaken Point, Newfoundland, Canada, rangeomorph “fronds” dominate the earliest (579–565 million years ago) fossil communities of large (0.1 to 2 m height) multicellular benthic eukaryotes. They lived in low-flow environments, fueled by uptake [1–3] of dissolved reactants (osmotrophy). However, prokaryotes are effective osmotrophs, and the advantage of taller eukaryotic osmotrophs in this deepwater community context has not been addressed. We reconstructed flow-velocity profiles and vertical mixing using canopy flow models appropriate to the densities of the observed communities. Further modeling of processes at organismal surfaces documents increasing uptake with height in the community as a function of thinning of the diffusive boundary layer with increased velocity. The velocity profile, produced by canopy flow in the community, generates this advantage of upward growth. Alternative models of upward growth advantage based on redox/resource gradients fail, given the efficiency of vertical mixing. In benthic communities of osmotrophs of sufficient density, access to flow in low-flow settings provides an advantage to taller architecture, providing a selectional driver for communities of tall eukaryotes in contexts where phototropism cannot contribute to upward growth. These Ediacaran deep-sea fossils were preserved during the increasing oxygenation prior to the Cambrian radiation of animals and likely represent an important phase in the ecological and evolutionary transition to more complex eukaryotic forms. |
format |
Text |
author |
Ghisalberti, Marco Gold, David A. Laflamme, Marc Clapham, Matthew E. Narbonne, Guy M. Summons, Roger E. Johnston, David T. Jacobs, David K. |
author_facet |
Ghisalberti, Marco Gold, David A. Laflamme, Marc Clapham, Matthew E. Narbonne, Guy M. Summons, Roger E. Johnston, David T. Jacobs, David K. |
author_sort |
Ghisalberti, Marco |
title |
Canopy Flow Analysis Reveals the Advantage of Size in the Oldest Communities of Multicellular Eukaryotes |
title_short |
Canopy Flow Analysis Reveals the Advantage of Size in the Oldest Communities of Multicellular Eukaryotes |
title_full |
Canopy Flow Analysis Reveals the Advantage of Size in the Oldest Communities of Multicellular Eukaryotes |
title_fullStr |
Canopy Flow Analysis Reveals the Advantage of Size in the Oldest Communities of Multicellular Eukaryotes |
title_full_unstemmed |
Canopy Flow Analysis Reveals the Advantage of Size in the Oldest Communities of Multicellular Eukaryotes |
title_sort |
canopy flow analysis reveals the advantage of size in the oldest communities of multicellular eukaryotes |
publishDate |
2014 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4428146/ http://www.ncbi.nlm.nih.gov/pubmed/24462003 https://doi.org/10.1016/j.cub.2013.12.017 |
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ENVELOPE(-55.774,-55.774,53.478,53.478) |
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Canada Mistaken Point |
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Canada Mistaken Point |
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Newfoundland |
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Newfoundland |
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4428146/ http://www.ncbi.nlm.nih.gov/pubmed/24462003 http://dx.doi.org/10.1016/j.cub.2013.12.017 |
op_rights |
© 2014 Elsevier Ltd All rights reserved |
op_doi |
https://doi.org/10.1016/j.cub.2013.12.017 |
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Current Biology |
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24 |
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3 |
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305 |
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309 |
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1766109236936310784 |