Canopy Flow Analysis Reveals the Advantage of Size in the Oldest Communities of Multicellular Eukaryotes
Video abstractAt 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...
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ftcdlib:oai:escholarship.org:ark:/13030/qt46r7q1dh 2023-09-05T13:21:13+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 305 - 309 2014-02-01 application/pdf https://escholarship.org/uc/item/46r7q1dh unknown eScholarship, University of California qt46r7q1dh https://escholarship.org/uc/item/46r7q1dh public Current Biology, vol 24, iss 3 Biological Evolution Eukaryota Biological Sciences Medical and Health Sciences Psychology and Cognitive Sciences Developmental Biology article 2014 ftcdlib 2023-08-21T18:04:42Z Video abstractAt 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 deep-water 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. Article in Journal/Newspaper Newfoundland University of California: eScholarship Canada Mistaken Point ENVELOPE(-55.774,-55.774,53.478,53.478) |
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Open Polar |
collection |
University of California: eScholarship |
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language |
unknown |
topic |
Biological Evolution Eukaryota Biological Sciences Medical and Health Sciences Psychology and Cognitive Sciences Developmental Biology |
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Biological Evolution Eukaryota Biological Sciences Medical and Health Sciences Psychology and Cognitive Sciences Developmental Biology 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 |
topic_facet |
Biological Evolution Eukaryota Biological Sciences Medical and Health Sciences Psychology and Cognitive Sciences Developmental Biology |
description |
Video abstractAt 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 deep-water 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 |
Article in Journal/Newspaper |
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 |
publisher |
eScholarship, University of California |
publishDate |
2014 |
url |
https://escholarship.org/uc/item/46r7q1dh |
op_coverage |
305 - 309 |
long_lat |
ENVELOPE(-55.774,-55.774,53.478,53.478) |
geographic |
Canada Mistaken Point |
geographic_facet |
Canada Mistaken Point |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Current Biology, vol 24, iss 3 |
op_relation |
qt46r7q1dh https://escholarship.org/uc/item/46r7q1dh |
op_rights |
public |
_version_ |
1776201819212480512 |