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Co-occurrence structure of late Ediacaran communities and influence of emerging ecosystem engineers.

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Title: Co-occurrence structure of late Ediacaran communities and influence of emerging ecosystem engineers.
Authors: Craffey, M.1 (AUTHOR) mcraffe2@gmail.com, Wagner, P. J.2 (AUTHOR) peterjwagner@unl.edu, Watkins, David K.2 (AUTHOR) dwatkins1@unl.edu, Darroch, S. A. F3 (AUTHOR) simon.darroch@senckenberg.de; simon.a.darroch@vanderbilt.edu, Lyons, S. K.1 (AUTHOR) katelyons@unl.edu
Source: Proceedings of the Royal Society B: Biological Sciences. 12/4/2025, Vol. 291 Issue 2036, p1-12. 12p.
Subjects: Bioturbation, Ediacaran fossils, Dispersal (Ecology), Biotic communities, Sessile organisms, Habitat selection
Abstract: Understanding the roles of habitat filtering, dispersal limitations and biotic interactions in shaping the organization of animal communities is a central research goal in ecology. Attempts to extend these approaches into deep time have the potential to illuminate the role of these processes over key intervals in evolutionary history. The Ediacaran marks one such interval, recording the first macroscopic benthic communities and a stepwise intensification in animal ecosystem engineering. Here, we use taxonomic co-occurrence analysis to evaluate how community structure shifted through the late Ediacaran and the role of different community assembly processes in driving these changes. We find that community structure shifted significantly throughout the Ediacaran, with the most dramatic shift occurring at the White Sea–Nama boundary (approx. 550 Ma) characterized by a split between older, more enigmatic taxonomic groups (the 'Ediacara-type' fauna) and more recognizable ('Cambrian-type') metazoans. While ecosystem engineering via bioturbation is implicated in this shift, dispersal limitations also played apart in separating biota types. We hypothesize that bioturbation acted as a local habitat filter in the late Ediacaran, selecting against genera adapted to microbial mat ecosystems. Ecosystem engineering regime shifts in the Ediacaran may thus have had a large impact on the development of subsequent metazoan communities. [ABSTRACT FROM AUTHOR]
Copyright of Proceedings of the Royal Society B: Biological Sciences is the property of Royal Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 191432260
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Co-occurrence structure of late Ediacaran communities and influence of emerging ecosystem engineers.
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  Data: <searchLink fieldCode="AR" term="%22Craffey%2C+M%2E%22">Craffey, M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> mcraffe2@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Wagner%2C+P%2E+J%2E%22">Wagner, P. J.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> peterjwagner@unl.edu</i><br /><searchLink fieldCode="AR" term="%22Watkins%2C+David+K%2E%22">Watkins, David K.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> dwatkins1@unl.edu</i><br /><searchLink fieldCode="AR" term="%22Darroch%2C+S%2E+A%2E+F%22">Darroch, S. A. F</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> simon.darroch@senckenberg.de; simon.a.darroch@vanderbilt.edu</i><br /><searchLink fieldCode="AR" term="%22Lyons%2C+S%2E+K%2E%22">Lyons, S. K.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> katelyons@unl.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22Proceedings+of+the+Royal+Society+B%3A+Biological+Sciences%22">Proceedings of the Royal Society B: Biological Sciences</searchLink>. 12/4/2025, Vol. 291 Issue 2036, p1-12. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Bioturbation%22">Bioturbation</searchLink><br /><searchLink fieldCode="DE" term="%22Ediacaran+fossils%22">Ediacaran fossils</searchLink><br /><searchLink fieldCode="DE" term="%22Dispersal+%28Ecology%29%22">Dispersal (Ecology)</searchLink><br /><searchLink fieldCode="DE" term="%22Biotic+communities%22">Biotic communities</searchLink><br /><searchLink fieldCode="DE" term="%22Sessile+organisms%22">Sessile organisms</searchLink><br /><searchLink fieldCode="DE" term="%22Habitat+selection%22">Habitat selection</searchLink>
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  Label: Abstract
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  Data: Understanding the roles of habitat filtering, dispersal limitations and biotic interactions in shaping the organization of animal communities is a central research goal in ecology. Attempts to extend these approaches into deep time have the potential to illuminate the role of these processes over key intervals in evolutionary history. The Ediacaran marks one such interval, recording the first macroscopic benthic communities and a stepwise intensification in animal ecosystem engineering. Here, we use taxonomic co-occurrence analysis to evaluate how community structure shifted through the late Ediacaran and the role of different community assembly processes in driving these changes. We find that community structure shifted significantly throughout the Ediacaran, with the most dramatic shift occurring at the White Sea–Nama boundary (approx. 550 Ma) characterized by a split between older, more enigmatic taxonomic groups (the 'Ediacara-type' fauna) and more recognizable ('Cambrian-type') metazoans. While ecosystem engineering via bioturbation is implicated in this shift, dispersal limitations also played apart in separating biota types. We hypothesize that bioturbation acted as a local habitat filter in the late Ediacaran, selecting against genera adapted to microbial mat ecosystems. Ecosystem engineering regime shifts in the Ediacaran may thus have had a large impact on the development of subsequent metazoan communities. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Proceedings of the Royal Society B: Biological Sciences is the property of Royal Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1098/rspb.2024.2029
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      – SubjectFull: Habitat selection
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              Text: 12/4/2025
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