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Ichnodiversity and ichnodisparity: significance and caveats
Abstract
Ichnodiversity has been used as a proxy for environmental stress and stability in facies interpretations and to reconstruct evolutionary radiations and colonization histories in evolutionary palaeoecology. The three components of global diversity are exported from ecology and adapted for ichnology. Alpha ichnodiversity is used for palaeoenvironmental characterization, being assessed for individual facies. Beta ichnodiversity is commonly overlooked, although it may provide information about degree of similarity between ichnofaunas formed along environmental gradients. Gamma ichnodiversity may provide clues to detect ichnofossil provincialism. The concept of disparity may also prove to be significant in ichnological studies. Whereas ichnodiversity refers to ichnotaxonomic richness, ichnodisparity provides a measure of the variability of morphological plans in biogenic structures. Changes in global ichnodiversity do not necessarily parallel changes in ichnodisparity. For example, while the Cambrian explosion involved a dramatic increase in both, the Ordovician radiation essentially reflects an increase only in the former. Ichnodiversity and ichnodisparity should be used with caution because they are both affected by taphonomic processes. High diversity of superficial to shallow-tier trace fossils may result from enhanced preservation due a poorly developed mixed layer, rather than a true reflection of ecosystem performance, as shown by underexploited infaunal ecospace after biot…
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Ichnodisparity provides a measure of the variability of basic morphological plans in biogenic structures, and consequently best records innovations in body plan, locomotory system and behavioural programme.
“Although ichnodiversity simply refers to trace-fossil richness, ichnodisparity (i.e. number of trace-fossil architectural designs) provides a measure of the variability of basic morphological plans in biogenic structures, and consequently best records innovations in body plan, locomotory system and behavioural programme [20].”
From Decoupling of body-plan diversification and ecological structuring during the Ediacaran–Cambrian transition: evolutionary and geobiological feedbacks (2014) · cites this paper as [20]
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Metadata
- Authors
- Buatois, L. A., & Mángano, M. G.
- Affiliations
- Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK S7N 5E2, Canada;
- University of Saskatchewan (CA)
- ORCID
- Mángano, M. Gabriela
- Venue
- Lethaia
- Publisher
- Scandinavian University Press
- Published
- 2013-07
- Volume
- 46
- Issue
- 3
- Pages
- 281-292
- ISSN
- 0024-1164 (ISSN-L)
- 1502-3931
- OpenAlex
- W2129714803
- Cited by
- 99
- References
- 7
- Citations by year
- 2026: 5 · 2025: 13 · 2024: 8 · 2023: 5 · 2022: 13 · 2021: 11 · 2020: 7 · 2019: 7 · 2018: 12 · 2017: 4 · 2016: 10 · 2015: 1 · 2014: 2 · 2013: 1
- FWCI
- 3.17
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Lethaia (publishedVersion)
- Funders
- Natural Sciences and Engineering Research Council (311727-05/08, 311726-05/08)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Evolution and Paleontology Studies
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Evolutionary Biology
- Keywords
- ichnodiversity, trace fossils, ichnotaxonomy, paleoenvironmental reconstruction, facies analysis, taphonomy, Cambrian explosion, Ordovician radiation, end-Permian mass extinction, biotic crises, environmental stress
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