Λεπτομέρειες βιβλιογραφικής εγγραφής
| Τίτλος: |
Comparison of taphonomic estimates for two common underwater sampling methodologies. |
| Συγγραφείς: |
Torres Jr., Luis1,2 (AUTHOR) Ltorres2@ufl.edu, Kowalewski, Michał1 (AUTHOR) |
| Πηγή: |
Historical Biology. Mar2026, Vol. 38 Issue 3, p589-597. 9p. |
| Θεματικοί όροι: |
*Sediment sampling, *Sampling (Process), *Marine sediment analysis, *Taphonomy, *Sea urchins, *Mollusks |
| Περίληψη: |
Whereas all sampling methods induce biases, implementation of different methodologies may amplify challenges associated with numerical comparisons within and across case studies. SCUBA-based underwater sediment sampling, commonly utilised in marine biology and palaeontology, employs two popular methodologies: hand collection and HVAC-suction sampling. Here, we compared relative mass proportions of mollusc and echinoid remains extracted from hand and HVAC sourced sediment samples collected from four sites representing three distinct depositional and climatic settings. Collected specimens were classified as fragmentary, complete dead, or live-collected, with relative abundances estimated via total mass (g) measurements. Hand and HVAC sample comparisons indicated consistent, statistically indistinguishable mass proportion estimates of live-collected molluscs, complete dead molluscs/echinoids, and fragmentary molluscs, including the mass proportions of mollusc fragments relative to complete dead molluscs (Hand: 0.807; HVAC: 0.788; p = 0.77), complete dead echinoids relative to combined complete mollusc/echinoid mass (Hand: 0.01; HVAC: 0.004; p = 0.62) and live-collected molluscs relative to complete dead molluscs (Hand: 0.067; HVAC: 0.064; p = 0.96). The results of this study do not necessarily indicate an unbiased sampling process but rather that both methodologies produced comparable, statistically indistinguishable estimates, thus justifying their joint usage when obtaining benthic samples for analyses. [ABSTRACT FROM AUTHOR] |
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