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Data from: Palaeoecological implications of the preservation potential of soft-bodied organisms in sediment-density flows: testing turbulent waters

Data from: Palaeoecological implications of the preservation potential of soft-bodied organisms in sediment-density flows: testing turbulent waters
Data from: Palaeoecological implications of the preservation potential of soft-bodied organisms in sediment-density flows: testing turbulent waters
Interpreting how far organisms within fossil assemblages may have been transported and if they all originated from the same location is fundamental to understanding whether they represent true palaeocommunities. In a three-factorial experimental design, we used an annular flume to generate actualistic sandy sediment-density flows that were fast (2 ms−1) and fully turbulent in order to test the effects of flow duration, sediment concentration, and grain angularity on the states of bodily damage experienced by the freshly euthanized polychaete Alitta virens. Results identified statistically significant effects of flow duration and grain angularity. Increasing sediment concentration had a statistically significant effect with angular sediment but not with rounded sediment. Our experiments demonstrate that if soft-bodied organisms such as polychaetes were alive and then killed by a flow then they would have been capable of enduring prolonged transport in fast and turbulent flows with little damage. Dependent upon sediment concentration and grain angularity, specimens were capable of remaining intact over flow durations of between 5 and 180 min, equating to transport distances up to 21.6 km. This result has significant palaeoecological implications for fossil lagerstätten preserved in deposits of sediment-density flows because the organisms present may have been transported over substantial distances and therefore may not represent true palaeocommunities.,Table of experimental trials with recorded states of bodily damageExperimental combinations of flow duration, sediment concentration and grain angularity with corresponding recorded states of bodily damage.Table of raw data.docx,
DRYAD
Bath Enright, Orla G.
cf0c02c8-bbff-4b34-81e0-382236696619
Minter, Nicholas John
d8c531a1-e918-494f-b838-0a7319e7ac04
Sumner, Esther J.
dbba4b92-89cc-45d9-888e-d0e87e5c10ac
Bath Enright, Orla G.
cf0c02c8-bbff-4b34-81e0-382236696619
Minter, Nicholas John
d8c531a1-e918-494f-b838-0a7319e7ac04
Sumner, Esther J.
dbba4b92-89cc-45d9-888e-d0e87e5c10ac

(2017) Data from: Palaeoecological implications of the preservation potential of soft-bodied organisms in sediment-density flows: testing turbulent waters. DRYAD doi:10.5061/dryad.22c0m [Dataset]

Record type: Dataset

Abstract

Interpreting how far organisms within fossil assemblages may have been transported and if they all originated from the same location is fundamental to understanding whether they represent true palaeocommunities. In a three-factorial experimental design, we used an annular flume to generate actualistic sandy sediment-density flows that were fast (2 ms−1) and fully turbulent in order to test the effects of flow duration, sediment concentration, and grain angularity on the states of bodily damage experienced by the freshly euthanized polychaete Alitta virens. Results identified statistically significant effects of flow duration and grain angularity. Increasing sediment concentration had a statistically significant effect with angular sediment but not with rounded sediment. Our experiments demonstrate that if soft-bodied organisms such as polychaetes were alive and then killed by a flow then they would have been capable of enduring prolonged transport in fast and turbulent flows with little damage. Dependent upon sediment concentration and grain angularity, specimens were capable of remaining intact over flow durations of between 5 and 180 min, equating to transport distances up to 21.6 km. This result has significant palaeoecological implications for fossil lagerstätten preserved in deposits of sediment-density flows because the organisms present may have been transported over substantial distances and therefore may not represent true palaeocommunities.,Table of experimental trials with recorded states of bodily damageExperimental combinations of flow duration, sediment concentration and grain angularity with corresponding recorded states of bodily damage.Table of raw data.docx,

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Published date: 1 January 2017

Identifiers

Local EPrints ID: 448460
URI: http://eprints.soton.ac.uk/id/eprint/448460
PURE UUID: 08c2a076-0acf-4d1e-9620-a53a8ea14515

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Date deposited: 22 Apr 2021 16:47
Last modified: 22 Apr 2021 16:47

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Contributors

Contributor: Orla G. Bath Enright
Contributor: Nicholas John Minter
Contributor: Esther J. Sumner

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