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Shells, teeth and bones of 'weird and wonderful organisms' provide historical environmental clues

Shells, teeth and bones of 'weird and wonderful organisms' provide historical environmental clues
The taxonomic breadth of chemical sclerochronology studies across the aquatic tree of life, including under-sampled taxa identified in our literature review. Credit: Limnology and Oceanography Letters (2024). DOI: 10.1002/lol2.10448

An international study shows how chemical fingerprints left by "underappreciated" aquatic organisms could help scientists monitor global environmental change.

The study, led by the University of South Australia (UniSA) and in Limnology and Oceanography Letters, reveals how various understudied aquatic species act as "natural data loggers," providing a historical record of the environment.

The team included researchers from the University of South Australia, University of Toronto, Memorial University of Newfoundland and Labrador, Institute of Oceanography and Fisheries and the University of Southampton.

Lead scientist Dr. Zoe Doubleday, from UniSA's Future Industries Institute, collaborated with researchers from Canada, Croatia and the U.K. to synthesize hundreds of studies that analyze chemical variations in the shells, teeth, and bones of weird and wonderful organisms.

"Many —like whales, seals, octopus and even algae—harbor that can give us a record of the environment over time, from historical water temperatures, pollution levels, and ecosystem health," Dr. Doubleday says. "They can also be used to predict the future."

"Unlike traditional environmental monitoring, which can be costly and time consuming, or simply impossible, these organisms provide cheap, ready-made, archival data, which can be extracted using a scientific method called chemical sclerochronology."

The research team compiled an extensive database of studies on "underappreciated" organisms, ranging from sponges and barnacles to marine mammals, and everything in between.

The team's analysis has uncovered gaps in the current research landscape, highlighting previously understudied species and structures as alternative environmental indicators.

"These findings are crucial, as data on is both scarce and challenging to gather, especially in remote regions like the polar seas or deep oceans, both of which are sensitive to ," Dr. Doubleday says.

"Expanding our focus beyond traditional methods and species will allow scientists to tap into a wealth of data that's been largely overlooked until now. It will help us to track environmental changes, species ecology, pollution and , informing conservation strategies so we can manage our ecosystems more effectively."

More information: Zoë A. Doubleday et al, Capitalizing on the wealth of chemical data in the accretionary structures of aquatic taxa: Opportunities from across the tree of life, Limnology and Oceanography Letters (2024).

Journal information: Limnology and Oceanography Letters

Citation: Shells, teeth and bones of 'weird and wonderful organisms' provide historical environmental clues (2024, November 27) retrieved 26 August 2025 from /news/2024-11-shells-teeth-bones-weird-historical.html
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